CN106381930A - Three-dimensional vibration isolation device capable of presetting vertical initial rigidity - Google Patents
Three-dimensional vibration isolation device capable of presetting vertical initial rigidity Download PDFInfo
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- CN106381930A CN106381930A CN201610905760.6A CN201610905760A CN106381930A CN 106381930 A CN106381930 A CN 106381930A CN 201610905760 A CN201610905760 A CN 201610905760A CN 106381930 A CN106381930 A CN 106381930A
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- 238000002955 isolation Methods 0.000 title claims abstract description 55
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 208
- 239000010959 steel Substances 0.000 claims abstract description 208
- 238000007667 floating Methods 0.000 claims abstract description 52
- 238000003825 pressing Methods 0.000 claims abstract description 45
- 230000006835 compression Effects 0.000 claims abstract description 42
- 238000007906 compression Methods 0.000 claims abstract description 42
- 230000035939 shock Effects 0.000 claims description 54
- 238000009413 insulation Methods 0.000 claims description 22
- 230000000149 penetrating effect Effects 0.000 claims description 10
- 230000003068 static effect Effects 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- 230000005489 elastic deformation Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/36—Bearings or like supports allowing movement
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/022—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising laminated structures of alternating elastomeric and rigid layers
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Abstract
The invention relates to a three-dimensional vibration isolation device capable of presetting the vertical initial rigidity. The three-dimensional vibration isolation device comprises a vertical isolation vibration support seat and a laminated rubber vibration isolation support seat which are mutually connected in series. The three-dimensional vibration isolation device is characterized in that a back pressure device is also arranged in a guide sleeve of the vertical vibration isolation support seat; the back pressure device comprises more than three pre-pressing steel wire ropes, steel wire rope direction changing elements with the same number as the pre-pressing steel wire rope and a floating back pressure steel plate; the pre-pressing steel wire ropes are in a folding line state; in addition, one end of each pre-pressing steel wire rope is symmetrically fixed on the floating back pressure steel plate by using the axial line of the guide sleeve as the symmetry axis; the other end of each pre-pressing steel wire rope is folded back after passing and bypassing through the corresponding steel wire rope direction changing element, and then passes through the floating back pressure steel plate beside the fixing point of the pre-pressing steel wire rope on the floating back pressure steel plate to be fixed on the base; the pre-pressing steel wire rope is tensioned to the tension required by the pre-setting of the vertical initial rigidity, so that a cylindrical spiral compression spring is always clamped between a driving press plate and the floating back pressure steel plate.
Description
Technical Field
The invention relates to a building anti-vibration (or shock) device, in particular to a three-dimensional shock isolation device formed by connecting an interlayer steel plate rubber pad and a vertical shock isolation support in series.
Background
The shock isolation device is a shock isolation device arranged between a building and a foundation. The early seismic isolation devices were mainly two-dimensional seismic isolation bearings (laminated rubber seismic isolation bearings) constructed by alternately laminating rubber and thin steel plates, which could only isolate the horizontal component of seismic waves. With the improvement of the knowledge of the multidimensional characteristics of the earthquake, the three-dimensional shock isolation device is gradually paid more attention by researchers in the field. The most common three-dimensional shock isolation device is formed by connecting a laminated rubber shock isolation support and an existing vertical shock isolation support in series.
The invention patent application with publication number CN 102409777A discloses a three-dimensional shock-insulation and anti-overturning device, the main body mechanism of the device is formed by connecting a laminated rubber shock-insulation support 14 and a spring shock-insulation support 15 in series, the upper side and the lower side of the main body structure are respectively provided with an upper connecting plate 1 and a lower connecting plate 18, and the device is characterized in that: tensile steel wire ropes 16 which are uniformly distributed around the main body structure in a staggered mode are arranged between the upper connecting plate 1 and the lower connecting plate 18, and the ultimate deformation of the tensile steel wire ropes 16 in the horizontal direction is larger than the horizontal shearing elastic deformation of the main body structure. Although the proposal of the patent application can improve the tensile strength of the three-dimensional seismic isolation device to resist the great tensile force generated by the swinging and even overturning of high-rise buildings in the earthquake, the proposal still has the following defects: 1. the spring shock insulation support can only compress energy dissipation and shock absorption, and cannot stretch the energy dissipation and shock absorption; 2. the spring shock insulation support can not preset initial rigidity, and is not convenient for presetting seismic intensity and reducing shock insulation cost.
The invention patent application with the publication number of CN1932324A discloses an adjustable disc spring mechanical shock absorption damper, which comprises a shell, a load connecting rod and two groups of disc springs, wherein the load connecting rod and the two groups of disc springs are arranged in the shell, the middle part of the load connecting rod is provided with an adjusting gear fixedly connected with the load connecting rod, the load connecting rods on the two sides of the adjusting gear are respectively provided with a left-handed nut and a right-handed nut which are in threaded fit with the load connecting rod, and the two groups of disc springs are respectively arranged on the outer sides of the left-handed nut and the right-handed nut and are respectively clamped between the left-handed nut or the right-handed nut and a sealing plate at the. The damping coefficient of the damper can be adjusted by only turning the adjusting gear on the load connecting rod to enable the left-handed nut and the right-handed nut to be close to or far away from each other, so that the pretightening force of the two groups of disk springs can be adjusted, and the use requirements of different frequencies and different amplitudes are met. However, the invention still has the following disadvantages: 1. the load connecting rod is kept in balance under the combined action of the two groups of disc springs, although the pretightening force of the two groups of disc springs can be adjusted, no matter how the pretightening force is adjusted, the acting forces of the two groups of disc springs on the load connecting rod are equal in one group, and opposite in direction, and the balance can be damaged only by applying any external force on the load connecting rod, so that the two groups of disc springs deform, and the damper cannot preset initial rigidity; 2. two groups of disc springs are matched to provide damping when the damper is under pressure or tension load, so that certain waste is caused, and the length of the damper is greatly increased.
The invention patent application with the publication number of CN101457553A discloses a tuned mass damper with adjustable spring stiffness, which is a composite damper, the characteristic frequency of the damper is changed by changing the thickness of a mass block, the damping ratio of the damper is changed by changing the flow of a working medium of the viscous damper, and the stiffness of the damper is changed by changing the effective working length of a spring, wherein three means are adopted for changing the effective working length of the spring, firstly, a section of the spring positioned in a curing cylinder is cured by adopting a curing material, secondly, a constraint block is inserted into the center of a spiral spring and is in interference fit with the spring, so that a section of the spring contacted with the constraint block fails, thirdly, a spiral bulge is arranged on the surface of the constraint block, and the spiral bulge is clamped between spring wires, so that a section of the spring clamped with the spiral bulge between the spring wires fails. It can be seen that although the spring in the patent application can change the stiffness, the effective working length of the spring is obviously shortened, and the spring can only compress energy consumption and reduce vibration but cannot stretch the energy consumption and reduce vibration.
Disclosure of Invention
The invention aims to solve the technical problem of providing a three-dimensional shock isolation device capable of presetting vertical initial stiffness, wherein the three-dimensional shock isolation device not only can compress energy consumption and shock absorption, but also can stretch energy consumption and shock absorption, and also keeps the effective working length of a cylindrical spiral compression spring in a vertical shock isolation support.
The technical scheme for solving the technical problems is as follows:
a three-dimensional shock isolation device capable of presetting vertical initial rigidity comprises a laminated rubber shock isolation support and a vertical shock isolation support which are sequentially connected in series from top to bottom; wherein,
the laminated rubber shock-insulation support comprises an upper connecting plate, a lower connecting plate, a laminated rubber pad clamped between the upper connecting plate and the lower connecting plate and at least three tensile steel wire ropes uniformly distributed around the laminated rubber pad; one end of the tensile steel wire rope is fixed on the upper connecting plate, the other end of the tensile steel wire rope is fixed on the lower connecting plate, and the connecting line of the upper fixing point and the lower fixing point is parallel to the central axis of the laminated rubber pad;
the vertical shock insulation support comprises a base, and a guide sleeve extending upwards is arranged on the upper surface of the base; a cylindrical spiral compression spring is coaxially arranged inside the guide sleeve, and a driving pressing plate is arranged at the upper head of the cylindrical spiral compression spring; the middle part of the lower surface of the lower connecting plate of the laminated rubber shock-insulation support extends into the guide sleeve to form a bulge which is fixedly connected with the driving pressure plate;
it is characterized in that the preparation method is characterized in that,
a back pressure device is also arranged in the guide sleeve of the vertical shock insulation support, the back pressure device comprises more than three pre-pressed steel wire ropes, steel wire rope turning elements with the same number as the pre-pressed steel wire ropes and a floating back pressure steel plate, wherein,
the floating back pressure steel plate is arranged between the cylindrical spiral compression spring and the base;
the steel wire rope turning element is symmetrically fixed on the driving pressing plate around the axis of the guide sleeve;
the prepressing steel wire ropes are distributed in the central hole of the cylindrical spiral compression spring in a broken line state, one end of each prepressing steel wire rope is symmetrically fixed on the floating back pressure steel plate around the axis of the guide sleeve, the other end of each prepressing steel wire rope passes through the opposite steel wire rope turning element and then turns back, and then the prepressing steel wire rope passes through the floating back pressure steel plate beside the fixed point of the prepressing steel wire rope on the floating back pressure steel plate and is fixed on the base;
on the floating back pressure steel plate, a through hole for penetrating the pre-pressed steel wire rope is arranged at the penetrating position of each pre-pressed steel wire rope, and the aperture of the through hole is larger than the diameter of the pre-pressed steel wire rope;
tensioning the pre-pressed steel wire rope to a tension required by a preset vertical initial stiffness, so that the cylindrical spiral compression spring is always clamped between the driving pressing plate and the floating back-pressure steel plate;
and tensioning the tensile steel wire rope to provide a pre-pressure equal to the designed static load for the laminated rubber pad.
The working principle of the vertical shock insulation of the three-dimensional shock insulation device is as follows: when the vertical dynamic load is relatively acted along the axis of the guide sleeve, the pressure is transmitted to the driving pressure plate through the laminated rubber shock-insulation support, so that the cylindrical helical compression spring is compressed by downward movement; when the dynamic load acts along the axis of the guide sleeve in the opposite direction, the tensile force is transmitted to the driving pressure plate through the tensile steel wire rope, the driving pressure plate moves upwards, and the prepressing steel wire rope reversely hoists the floating counter-pressure steel plate through the steel wire rope turning element to compress the cylindrical spiral compression spring. Therefore, no matter the axial dynamic load is oppositely or reversely acted on the three-dimensional shock isolation device, the cylindrical spiral compression spring can be compressed, and the cylindrical spiral compression spring is elastically deformed to consume energy.
According to the working principle, the prepressing steel wire rope and the hole wall of the through hole in the floating back pressure steel plate cannot generate friction in the working process, otherwise, the up-and-down movement of the floating back pressure steel plate is interfered, so that the diameter of the through hole is larger than that of the prepressing steel wire rope, and the up-and-down movement of the floating back pressure steel plate is preferably not interfered and influenced.
In the above scheme, the wire rope direction changing element is a common fixed pulley or a hoisting ring-shaped member with a direction changing function similar to that of the common fixed pulley, such as a hoisting ring screw, a U-shaped member and the like.
According to the three-dimensional shock isolation device capable of presetting the vertical initial stiffness, two ends of the prepressing steel wire rope can be fixed by welding or can be fixedly tied by similar lifting bolts, however, if the two ends are fixedly tied by welding or lifting bolts, the tension can be preset only by calculating in advance and strictly controlling the length of the prepressing steel wire rope to achieve the purpose of presetting the initial stiffness, and further the purpose of presetting the initial stiffness is achieved. However, in the actual production and debugging process, the purpose of presetting the initial stiffness by adopting the method for controlling the length of the pre-pressed steel wire rope has two major problems, namely, errors are generated in the welding or tying process, and even if the errors generated in the welding or tying process are controlled, the steel wire rope can also cause the change of characteristic parameters in the cutting and placing processes. In order to solve the technical problem, an improved scheme of the invention is as follows:
the other end of the prepressing steel wire rope of the vertical shock insulation support is fixed on the base through a steel wire rope self-locking anchorage device; the steel wire rope self-locking anchorage device consists of a mounting hole, a clamping jaw and a check bolt, wherein,
the mounting hole is formed in the base; the mounting hole consists of a section of taper hole and a section of threaded hole, wherein the taper hole is positioned at one side close to the guide sleeve, the pointed end points into the guide sleeve, and the threaded hole is positioned at the other side far away from the guide sleeve;
the clamping jaw is conical and matched with the taper hole, and consists of 3-5 petals, and a clamping hole for clamping and prepressing the steel wire rope is formed in the clamping jaw along the axis;
the anti-loosening bolt is matched with the threaded hole, and a round hole with the diameter larger than that of the corresponding prepressing steel wire rope is arranged in the anti-loosening bolt along the axis;
the clamping jaw is installed in the taper hole, and the anti-loosening bolt is installed in the threaded hole.
It can be seen from the above improved scheme that one end of each prepressing steel wire rope is fixed on the floating counter-pressure plate, and the other end of each prepressing steel wire rope penetrates through the clamping hole and the round hole of the steel wire rope self-locking anchorage device, so that the exposed rope end can be tied on a traction tensioning machine, and tension is monitored by adopting a tension detector while traction tensioning is carried out. When the pre-pressing steel wire rope is tensioned to the tension required by the preset initial rigidity, the anti-loosening bolt is screwed to push the clamping jaw to clamp and lock the pre-pressing steel wire rope, and the pre-pressing steel wire rope cannot be loosened even in the repeated relaxation vibration process.
Compared with the prior art, the three-dimensional shock isolation device capable of presetting the vertical initial stiffness has the following effects:
(1) in the vertical direction, the energy dissipation and the shock absorption can be compressed and stretched; the huge pulling force of the high-rise building on the building foundation due to swinging can be effectively reduced; and only one spiral compression spring is needed, the vertical length is small, and the stability is good.
(2) When the vertical dynamic load is larger than the preset resisting capacity of the vertical initial rigidity, the two-way elastic deformation of the vertical shock insulation support is symmetrical, so that the compression deformation energy consumption effect of the vertical shock insulation support is not influenced by the change of the positive direction and the negative direction of the vertical load;
(3) the vertical initial rigidity of the whole device can be changed by changing the length of the prepressing steel wire rope, the shock insulation device cannot generate vertical deformation by external force before the vertical initial rigidity is overcome, the shaking of the building under the action of small earthquake and weak wind vibration is effectively inhibited, the wind and shock resistance grade of the building can be preset, and the wind and shock resistance cost is obviously reduced;
(4) in the process of presetting the initial stiffness, the effective working length of the cylindrical spiral compression spring is unchanged, and the original characteristic parameters of the cylindrical spiral compression spring cannot be changed.
(5) The tension and compression impact on the building foundation caused by the building shaking trend of the building can be effectively buffered, and the risk of overturning of the building is further reduced.
Drawings
Fig. 1 to 6 are schematic structural views of an embodiment of a three-dimensional seismic isolation apparatus according to the present invention, in which fig. 1 is a front view (D-D rotation section of fig. 3), fig. 2 is a cross-sectional view a-a (with pre-stressed steel wire rope omitted) of fig. 1, fig. 3 is a cross-sectional view B-B (with pre-stressed steel wire rope omitted) of fig. 1, fig. 4 is a cross-sectional view C-C (with tensile steel wire rope omitted) of fig. 1, fig. 5 is an enlarged structural view of a part i of fig. 1, and fig. 6 is an enlarged structural view of a part ii.
Fig. 7 to 12 are schematic structural views of a three-dimensional seismic isolation device according to a second embodiment of the present invention, in which fig. 7 is a front view (cross-sectional view), fig. 8 is a cross-sectional view from E to E of fig. 7 (pre-stressed steel wire rope is omitted), fig. 9 is a cross-sectional view from F to F of fig. 7 (pre-stressed steel wire rope is omitted), fig. 10 is an enlarged view from G to G of fig. 8, fig. 11 is an enlarged view of a structure of a part iii of fig. 7, and fig. 12 is an enlarged cross-sectional view from H to H of.
Fig. 13 to 17 are schematic structural views of a third embodiment of the three-dimensional seismic isolation device according to the present invention, in which fig. 13 is a front view (cross section), fig. 14 is a cross section I-I (with the pre-stressed wire rope omitted) of fig. 13, fig. 15 is a cross section J-J (with the pre-stressed wire rope omitted) of fig. 13, fig. 16 is an enlarged structural view of a portion iv of fig. 13, and fig. 17 is an enlarged structural view of a portion v of fig. 13.
Detailed Description
Example 1
Referring to fig. 1, the three-dimensional isolation bearing in this example is composed of a laminated rubber isolation bearing and a vertical isolation bearing which are connected in series up and down.
Referring to fig. 1 and 4, the laminated rubber vibration-isolating support comprises an upper connecting plate 15, a lower connecting plate 8, a laminated rubber pad 17 clamped between the upper connecting plate and the lower connecting plate, and six tensile steel wire ropes 16; the upper connecting plate 15 and the lower connecting plate 8 are both disc-shaped, and the edge of the upper connecting plate 15 is provided with a mounting hole 6; the main body of the laminated rubber pad 17 is formed by alternately laminating a layer of rubber 17-1 and a layer of steel plate 17-2 and then performing mould pressing vulcanization, and a rubber protective layer 17-3 is naturally formed on the periphery of the laminated rubber pad in the mould pressing vulcanization process. The upper end face and the lower end face of the laminated rubber pad 17 main body are respectively provided with a connecting steel plate 17-4, and the two connecting steel plates 17-4 are respectively welded and fixed with the upper connecting plate 15 and the lower connecting plate 8. The six tensile steel wire ropes 16 are symmetrically distributed around the central axis of the laminated rubber pad 17, one end of each tensile steel wire rope 16 is fixed on the upper connecting plate 15 through a lifting bolt 10, and the other end of each tensile steel wire rope is fixed on the lower connecting plate 8 through the lifting bolt 10. Each tensile steel wire rope 16 is tensioned, so that the sum of the tensions of the six tensile steel wire ropes 16 is equal to the designed vertical static load of the three-dimensional vibration isolation device in the embodiment, and after tensioning, each tensile steel wire rope 16 is parallel to the central axis of the laminated rubber pad 17.
Referring to fig. 1-6, the vertical shock insulation support comprises a guide sleeve 1, a base 3, a cylindrical spiral compression spring 4 and a back pressure device.
Referring to fig. 1-3, the guide sleeve 1 is in a circular tube shape, the upper end of the guide sleeve contracts inwards and radially to form an annular flange 2 for limiting and guiding, and the lower end of the guide sleeve extends outwards and radially to form a flange 5. The base 3 is disc-shaped, mounting holes 6 are formed in the peripheral edge, and the guide sleeve 1 is fixed in the middle of the upper surface of the guide sleeve through a flange 5 arranged at the lower end of the guide sleeve.
Referring to fig. 1 to 3, the cylindrical helical compression spring 4 is arranged in the guide sleeve 1, a driving pressure plate 7 which is in movable fit with the guide sleeve 1 is arranged at the upper end of the cylindrical helical compression spring 4, wherein a cylindrical protrusion extends into the guide sleeve 1 from the middle of the lower surface of the lower connecting plate 8, and the protrusion and the driving pressure plate 7 are fixedly connected together through screws.
Referring to fig. 1, a gap 14 larger than the amplitude is formed between the lower connecting plate 8 and the annular flange 2; in order to avoid the impact between the driving pressure plate 7 and the annular flange 2 during the vibration process, an anti-collision gap 13 is arranged between the driving pressure plate 7 and the annular flange 2.
Referring to fig. 1-3, the back pressure device is arranged in the guide sleeve 1, and the specific scheme is as follows:
referring to fig. 1 to 6, the back pressure device comprises three pre-pressed steel wire ropes 9, three lifting ring screws 10 serving as steel wire rope turning elements, a floating back pressure steel plate 11 and six other lifting ring screws 10 for fixing the pre-pressed steel wire ropes 9. Wherein,
the floating back pressure steel plate 11 is arranged between the cylindrical spiral compression spring 4 and the base 3;
the three lifting ring screws 10 serving as steel wire rope direction changing elements are symmetrically fixed on the driving pressing plate 7 around the axis of the guide sleeve 1;
three lifting ring screws 10 are symmetrically arranged on the floating back-pressure steel plate 11 around the axis of the guide sleeve 1, and another three lifting ring screws 10 are correspondingly arranged on the floating back-pressure steel plate 11 beside the opposite positions of the three lifting ring screws 10 on the base 3; three pre-pressing steel wire ropes 9 are all arranged in a central hole of the cylindrical spiral compression spring 4 in a broken line state, one end of each pre-pressing steel wire rope 9 is tied and fixed on one lifting bolt 10 arranged on the floating counter-pressure steel plate 11, the other end of each pre-pressing steel wire rope 9 bypasses the lifting bolt 10 which is used as a steel wire rope turning element and then turns back, and then the pre-pressing steel wire rope 9 penetrates through the floating counter-pressure steel plate 11 from the position, corresponding to the lifting bolt 10 arranged on the base 3, beside the fixed point of the pre-pressing steel wire rope on the floating counter-pressure steel plate 11 and is tied and fixed on; on the floating back pressure steel plate 11, a through hole 12 penetrating the pre-pressing steel wire rope 9 is arranged at the penetrating position of each pre-pressing steel wire rope 9, and the diameter of the through hole 12 is larger than the diameter of the pre-pressing steel wire rope 9.
Referring to fig. 1 to 3, in order to achieve the purpose of presetting the vertical initial stiffness, the three-dimensional seismic isolation device mounting method comprises the following steps: (1) firstly, determining the compression amount of the cylindrical spiral compression spring 4 according to the vertical initial stiffness required to be preset and the elastic coefficient of the cylindrical spiral compression spring 4, and further calculating the length of each pre-pressed steel wire rope 9 meeting the vertical initial stiffness requirement; (2) after connecting the cylindrical helical compression spring 4, the back pressure device and the driving pressure plate 7 according to fig. 1-3, firstly compressing the cylindrical helical compression spring 4, exposing three lifting ring screws 10 on the floating back pressure steel plate 11 and three through holes 12 on the base 3, then repeatedly adjusting to make the actual length of each prepressing steel wire rope 9 equal to the calculated length, then tying the prepressing steel wire rope to the lifting ring screws 10 on the base 3, fixing the prepressing steel wire rope by common steel wire rope clamps (not shown in the figure), and clamping the cylindrical helical compression spring 4 between the driving pressure plate 7 and the floating back pressure steel plate 11 all the time; (3) putting the assembled components in the step (2) into a guide sleeve 1, fixing the guide sleeve 1 and a base 3 together, and fixing a lower connecting plate 8 and a driving pressure plate 7 together; (4) and finally, installing the laminated rubber shock-isolating support above the lower connecting plate 8 according to the figures 1 and 4 to obtain the three-dimensional shock-isolating device.
When the vertical initial stiffness is preset, the sum of the tensions of the three pre-pressed steel wire ropes 9 is more than or equal to the vertical static load borne by the three-dimensional shock isolation device.
Under ideal conditions, the building should not displace when the vertical waves of the earthquake are transmitted to the building through the shock isolation device. Based on this, the working principle of the three-dimensional vibration isolation device of the embodiment for vertical vibration isolation is as follows: referring to fig. 1, when the dynamic load generated by the vertical wave of the earthquake overcomes the vertical initial stiffness, if the dynamic load pushes up the base 3 along the axis of the guide sleeve 1, the reaction force of the driving platen 7 compresses the cylindrical helical compression spring 4 downward, and the base 3 moves upward along with the ground without the building moving; if the base 3 is pulled down along the axis of the guide sleeve 1 by the dynamic load, the prepressing steel wire rope 9 reversely lifts the floating counter-pressure steel plate 11 by the lifting bolt 10 as a steel wire rope turning element, the cylindrical spiral compression spring 4 is compressed upwards, the base 3 moves downwards along with the ground, but the building is still motionless. Therefore, when the ground vibrates up and down due to the longitudinal seismic wave, the cylindrical spiral compression spring can be compressed to generate elastic deformation so as to consume energy. Similarly, when the building shakes under the action of wind vibration or horizontal seismic waves, the cylindrical spiral compression spring can be compressed to generate elastic deformation and consume energy no matter whether the dynamic load on the three-dimensional shock isolation device is tensile force or pressure.
Example 2
Referring to fig. 7 to 12, the present example is mainly improved based on example 1 in the following points: (1) increasing the number of the pre-pressed steel wire ropes 9 from three to six; (2) replacing the lifting eye screw 10 as a wire rope direction changing element with a U-shaped member 19; (3) replacing a lifting ring screw 10 for fixing the other end of the pre-pressed steel wire rope 9 with a steel wire rope self-locking anchorage 18; (4) the middle part of the base 3 is thickened and is bulged upwards to form an inverted basin shape, so that a steel wire rope self-locking anchorage device 18 is installed conveniently; (5) the counter-pressure device is correspondingly changed to:
the back pressure device consists of six pre-pressed steel wire ropes 9, six U-shaped members 19 serving as steel wire rope turning elements, a floating back pressure steel plate 11, six lifting ring screws 10 for fixing one ends of the pre-pressed steel wire ropes 9 and six steel wire rope self-locking anchors 18 for fixing the other ends of the pre-pressed steel wire ropes 9; wherein,
the floating back pressure steel plate 11 is arranged between the cylindrical spiral compression spring 4 and the base 3;
six U-shaped members 19 as steel wire rope direction changing elements are symmetrically fixed on the driving pressing plate 7 around the axis of the guide sleeve 1; referring to fig. 10, the U-shaped member 19 is formed by bending round steel, and round holes matched with two side edges of the U-shaped member 19 are formed in the corresponding positions of the driving platen 7 where the U-shaped member 19 is arranged, the U-shaped member 19 is inserted into the round holes, and the two are welded and fixed together;
six lifting ring screws 10 are symmetrically arranged on the floating back pressure steel plate 11 around the axis of the guide sleeve 1, and six steel wire rope self-locking anchors 18 are correspondingly arranged beside the opposite positions of the six lifting ring screws 10 arranged on the floating back pressure steel plate 11 on the base 3; six pre-pressing steel wire ropes 9 are distributed in the central hole of the cylindrical spiral compression spring 4 in a broken line state, one end of each pre-pressing steel wire rope 9 is fixed on the floating counter-pressure steel plate 11 by a lifting ring screw 10, the other end of each pre-pressing steel wire rope 9 is folded after passing through a U-shaped member 19 which is used as a steel wire rope turning element and is opposite, then the pre-pressing steel wire rope 9 passes through the floating counter-pressure steel plate 11 from a position which corresponds to a steel wire rope self-locking anchorage 18 arranged on the base 3 beside a fixed point on the floating counter-pressure steel plate 11, and is fixed on the base; on the floating back pressure steel plate 11, a through hole 12 penetrating the pre-pressing steel wire rope 9 is arranged at the penetrating position of each pre-pressing steel wire rope 9, and the diameter of the through hole 12 is larger than the diameter of the pre-pressing steel wire rope 9.
Referring to fig. 11 and 12, in the above-mentioned counter-pressure device, the steel wire rope self-locking anchorage 18 is composed of a mounting hole 18-1, a clamping jaw 18-2 and a locking bolt 18-3, wherein the mounting hole 18-1 is arranged on the base 3; the mounting hole 18-1 consists of a section of taper hole and a section of threaded hole, wherein the taper hole is positioned at one side in the guide sleeve 1, the pointed end points to the inside of the guide sleeve 1, and the threaded hole is positioned at one side outside the guide sleeve 1; the clamping jaw 18-2 is conical and matched with the taper hole, and consists of 3 petals, and a clamping hole for clamping and prepressing the steel wire rope 9 is arranged in the clamping jaw along the axis; the check bolt 18-3 is matched with the threaded hole, and a round hole with the diameter larger than that of the pre-pressing steel wire rope 9 is arranged in the body along the axis; the clamping jaw 18-2 is arranged in the taper hole, and the anti-loose bolt 18-3 is arranged in the threaded hole.
And (3) assembling the three-dimensional shock isolation device according to the figures 7-12, and enabling the other end of the corresponding pre-pressed steel wire rope 9 to penetrate out of the corresponding clamping hole in the clamping jaw 18-2 and the round hole of the anti-loosening bolt 18-3. Then the rope head of the exposed prepressing steel wire rope 9 is tied on a traction tensioning machine, and the tension of the prepressing steel wire rope 9 is monitored by a tension detector while the traction tensioning is carried out. When the pre-pressing steel wire rope 9 is tensioned to the tension required by the preset vertical initial stiffness, the locking bolt 18-3 is screwed to push the clamping jaw 18-2 to clamp and lock the pre-pressing steel wire rope 9, so that the cylindrical spiral compression spring 4 is always clamped between the floating back-pressure steel plate 11 and the driving pressure plate 7.
The other embodiments other than the above-described embodiment are the same as those of embodiment 1.
The working principle of the three-dimensional shock isolation device is the same as that of the three-dimensional shock isolation device in the embodiment 1, and the public can analyze the three-dimensional shock isolation device by referring to the embodiment 1.
Example 3
Referring to fig. 13 to 17, the present example is mainly improved based on example 2 as follows: (1) replacing a U-shaped member 19 as a wire rope direction changing element with a fixed pulley 20; (2) the counter-pressure device is correspondingly changed to:
the back pressure device consists of four pre-pressed steel wire ropes 9, four fixed pulleys 20 serving as steel wire rope turning elements, a floating back pressure steel plate 11, four lifting ring screws 10 for fixing one end of the pre-pressed steel wire ropes 9 and four steel wire rope self-locking anchors 18 for fixing the other end of the pre-pressed steel wire ropes 9. Wherein,
the floating back pressure steel plate 11 is arranged between the cylindrical spiral compression spring 4 and the base 3;
four fixed pulleys 20 which are used as steel wire rope turning elements symmetrically fix the lower surface of the driving pressure plate 7 in the central hole of the cylindrical spiral compression spring 4 around the axis of the guide sleeve 1; wherein, the fixed pulley 20 is hinged on a bracket which is welded on the driving pressure plate 7;
four lifting ring screws 10 are symmetrically arranged on the floating back pressure steel plate 11 around the axis of the guide sleeve 1, and four steel wire rope self-locking anchors 18 are correspondingly arranged on the base 3 beside the opposite positions of the four lifting ring screws 10 arranged on the floating back pressure steel plate 11; four pre-pressing steel wire ropes 9 are distributed in the central hole of the cylindrical spiral compression spring 4 in a broken line state, one end of each pre-pressing steel wire rope 9 is fixed on a floating counter-pressure steel plate 11 through a lifting ring screw 10, the other end of each pre-pressing steel wire rope 9 is folded after passing through a fixed pulley 20 which is used as a steel wire rope turning element and is opposite, then the pre-pressing steel wire rope 9 passes through the floating counter-pressure steel plate 11 from a position which corresponds to a steel wire rope self-locking anchorage device 18 arranged on the base 3 beside a fixed point on the floating counter-pressure steel plate 11, and is fixed on the; on the floating back pressure steel plate 11, a through hole 12 penetrating the pre-pressing steel wire rope 9 is arranged at the penetrating position of each pre-pressing steel wire rope 9, and the diameter of the through hole 12 is larger than the diameter of the pre-pressing steel wire rope 9.
Other embodiments other than the above-described embodiment are the same as those of embodiment 2.
The working principle of the three-dimensional shock isolation device is the same as that of the three-dimensional shock isolation device in the embodiment 1, and the public can analyze the three-dimensional shock isolation device by referring to the embodiment 1.
Claims (3)
1. A three-dimensional shock isolation device capable of presetting vertical initial rigidity comprises a laminated rubber shock isolation support and a vertical shock isolation support which are sequentially connected in series from top to bottom; wherein,
the laminated rubber shock-insulation support comprises an upper connecting plate, a lower connecting plate, a laminated rubber pad clamped between the upper connecting plate and the lower connecting plate and at least three tensile steel wire ropes uniformly distributed around the laminated rubber pad; one end of the tensile steel wire rope is fixed on the upper connecting plate, the other end of the tensile steel wire rope is fixed on the lower connecting plate, and the connecting line of the upper fixing point and the lower fixing point is parallel to the central axis of the laminated rubber pad;
the vertical shock insulation support comprises a base, and a guide sleeve extending upwards is arranged on the upper surface of the base; a cylindrical spiral compression spring is coaxially arranged inside the guide sleeve, and a driving pressing plate is arranged at the upper head of the cylindrical spiral compression spring; the middle part of the lower surface of the lower connecting plate of the laminated rubber shock-insulation support extends into the guide sleeve to form a bulge which is fixedly connected with the driving pressure plate;
it is characterized in that the preparation method is characterized in that,
a back pressure device is also arranged in the guide sleeve of the vertical shock insulation support, the back pressure device comprises more than three pre-pressed steel wire ropes, steel wire rope turning elements with the same number as the pre-pressed steel wire ropes and a floating back pressure steel plate, wherein,
the floating back pressure steel plate is arranged between the cylindrical spiral compression spring and the base;
the steel wire rope turning element is symmetrically fixed on the driving pressing plate around the axis of the guide sleeve;
the prepressing steel wire ropes are distributed in the central hole of the cylindrical spiral compression spring in a broken line state, one end of each prepressing steel wire rope is symmetrically fixed on the floating back pressure steel plate around the axis of the guide sleeve, the other end of each prepressing steel wire rope passes through the opposite steel wire rope turning element and then turns back, and then the prepressing steel wire rope passes through the floating back pressure steel plate beside the fixed point of the prepressing steel wire rope on the floating back pressure steel plate and is fixed on the base;
on the floating back pressure steel plate, a through hole for penetrating the pre-pressed steel wire rope is arranged at the penetrating position of each pre-pressed steel wire rope, and the aperture of the through hole is larger than the diameter of the pre-pressed steel wire rope;
tensioning the pre-pressed steel wire rope to a tension required by a preset vertical initial stiffness, so that the cylindrical spiral compression spring is always clamped between the driving pressing plate and the floating back-pressure steel plate;
and tensioning the tensile steel wire rope to provide a pre-pressure equal to the designed static load for the laminated rubber pad.
2. The three-dimensional seismic isolation device capable of presetting vertical initial stiffness according to claim 1, wherein the other end of the prepressing steel wire rope of the vertical seismic isolation support is fixed on a base through a steel wire rope self-locking anchorage; the steel wire rope self-locking anchorage device consists of a mounting hole, a clamping jaw and a check bolt, wherein,
the mounting hole is formed in the base; the mounting hole consists of a section of taper hole and a section of threaded hole, wherein the taper hole is positioned at one side close to the guide sleeve, the pointed end points into the guide sleeve, and the threaded hole is positioned at the other side far away from the guide sleeve;
the clamping jaw is conical and matched with the taper hole, and consists of 3-5 petals, and a clamping hole for clamping and prepressing the steel wire rope is formed in the clamping jaw along the axis;
the anti-loosening bolt is matched with the threaded hole, and a round hole with the diameter larger than that of the corresponding prepressing steel wire rope is arranged in the anti-loosening bolt along the axis;
the clamping jaw is installed in the taper hole, and the anti-loosening bolt is installed in the threaded hole.
3. The three-dimensional seismic isolation device capable of presetting initial vertical rigidity according to claim 1 or 2, wherein the steel wire rope direction changing element is a fixed pulley, a lifting ring screw or a U-shaped component.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610905760.6A CN106381930A (en) | 2016-10-17 | 2016-10-17 | Three-dimensional vibration isolation device capable of presetting vertical initial rigidity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610905760.6A CN106381930A (en) | 2016-10-17 | 2016-10-17 | Three-dimensional vibration isolation device capable of presetting vertical initial rigidity |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113789879A (en) * | 2021-09-07 | 2021-12-14 | 湖南省潇振工程科技有限公司 | Pulley type tuned mass eddy current damper |
| CN113911395A (en) * | 2021-09-29 | 2022-01-11 | 北京空间飞行器总体设计部 | Variable-rigidity unfolding mechanism for asteroid sampling detection |
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| CN87100223A (en) * | 1987-02-07 | 1987-08-12 | 华东建筑设计院 | Prestressed damping spring vibration-reducing apparatus |
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| CN113911395B (en) * | 2021-09-29 | 2024-03-26 | 北京空间飞行器总体设计部 | Variable-rigidity unfolding mechanism for asteroid sampling detection |
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Application publication date: 20170208 |