WO2023124969A1

WO2023124969A1 - Friction energy dissipation type wind-resistant support and method

Info

Publication number: WO2023124969A1
Application number: PCT/CN2022/138659
Authority: WO
Inventors: 徐源庆; 过超; 王冰; 徐军; 吴玲正; 朱超; 张精岳; 陈占力; 李冲; 丛波; 刘海亮
Original assignee: 中交公路长大桥建设国家工程研究中心有限公司
Priority date: 2021-12-30
Filing date: 2022-12-13
Publication date: 2023-07-06
Also published as: CN114232469B; CN114232469A

Abstract

A friction energy dissipation type wind-resistant support, and a method. The support comprises a planar friction pair and a rotating friction pair, and further comprises a rotating shaft (5), a middle lining plate (6), a guide shaft (9), a first elastic body (10), a friction damper spring assembly (13) and a bottom basin assembly (14), an inner concave hole being provided in the center of a convex spherical surface of a spherical crown; the rotating shaft (5) is arranged in the center of the middle lining plate (6), and the rotating shaft (5) is inserted into the inner concave hole, so that the rotating shaft (5) may adapt to rotation of the support in a horizontal plane; the middle lining plate (6) is arranged on the bottom basin assembly (14), the guide shaft (9) is also arranged on the bottom basin assembly (14); the first elastic body (10) is sleeved on the guide shaft (9), and buffering and restoring force is provided for the movement of a main girder across a bridge by means of the first elastic body (10), which has an energy absorption effect; and the friction damper spring assembly (13) is horizontally arranged in the bottom basin assembly (14) and is perpendicular to the arrangement direction of the guide shaft (9). The function of sliding friction energy dissipation is achieved by applying a pre-tightening force to the friction damper spring assembly (13). The wind-resistant support solves the problems of an impact force on the main girder being large, and the spherical crown of the support easily falling off, under the action of transverse wind on the bridge.

Description

A frictional energy dissipation type wind-resistant support and its method

technical field

The invention relates to the technical field of bridge wind-resistant bearings, and more specifically, to a frictional energy-dissipating wind-resistant bearing and a method thereof.

Background technique

With the rapid development and construction of domestic highway bridges, the number of long-span cable-stayed bridges and suspension bridges is increasing day by day. However, due to the structural system of long-span bridges, the transverse direction of the bridge is more sensitive to wind loads, and the transverse direction of the bridge has always been the focus of wind resistance. Concerns. In the long-span bridge structure, the wind-resistant bearing is set between the inner side of the bridge tower and the outer side of the main girder, which can limit the transverse swing of the bridge caused by wind load or earthquake load, bear and transmit the horizontal force of the transverse bridge direction, and A device that can adapt to the longitudinal/lateral displacement, vertical displacement and rotation angle of the beam body.

At present, wind-resistant bearings are mainly divided into steel bearings and basin-type rubber bearings. The existing technology has the following disadvantages: (1) Conventional wind-resistant bearings are basically rigid bearings, which do not have the function of vibration reduction and energy consumption. Vibration under the action of wind load will lead to greater stress on the structure, which is prone to damage and difficult to repair after damage. Judging from the current situation of the use of the existing bridge wind-resistant bearings, the wind-resistant bearings in the direction of the main girder cross-bridge often appear empty, while the wind-resistant bearings with conventional structures are prone to fall off of spherical crowns, slide plates and other parts Risks; (2) The vibration-reducing and energy-consuming wind-resistant bearing adopts energy-consuming components such as disc springs and viscous dampers. Due to the small displacement and low speed of the wind-resistant bearing, the disc spring and viscous damp The effect of vibration reduction and energy consumption of the device and the like is not obvious, resulting in that although it has the function of vibration reduction and energy consumption, the effect is poor.

Contents of the invention

Aiming at the above defects or improvement needs of the prior art, the present invention provides a frictional energy consumption type wind-resistant support and its method. The support includes a plane friction pair, a rotating friction pair, a rotating shaft, an intermediate liner, a guide shaft, a An elastic body, a fixed plate, a friction copper plate assembly, a friction damper spring assembly, a bottom basin assembly and a side plate, the plane friction pair and the rotation friction pair are arranged on the middle liner, and the side plate is vertically fixed It is arranged on the bottom basin assembly, the intermediate liner is parallel to the bottom basin assembly, the guide shaft is fixed on the bottom basin assembly, and the first elastic body is provided on the guide shaft, Both ends of the elastic body are respectively supported on the middle liner and the bottom basin assembly, and when the middle liner slides up and down along the inner wall of the side plate, it compresses the first elastic body to play the role of energy absorption and vibration reduction , the fixed plate is arranged parallel to the side plate, and is fixedly installed on the bottom basin assembly. Both sides of the friction copper plate assembly are slidably connected with the side plate and the fixed plate to form a plane friction pair. The top of the friction copper plate assembly contacts the middle liner, and when the liner pushes the friction copper plate assembly down, the plane friction pair absorbs the kinetic energy of the middle liner, and the friction damper spring assembly passes through the side plate . The friction copper plate assembly and the fixed plate are arranged to make the friction copper plate assembly close to the fixed plate, the rotating shaft is vertically fixed on the middle liner, and the top is inserted into the rotating friction pair Its displacement is limited within the bridge, which solves the problems that the main girder of the bridge has a large impact force under the action of cross wind and the spherical crown of the support is easy to fall off.

In order to achieve the above purpose, according to one aspect of the present invention, a frictional energy dissipation type wind-resistant bearing and method are provided, including:

Plane friction pair, rotating friction pair, rotating shaft, intermediate liner, guide shaft, first elastic body, fixed plate, friction copper plate assembly, friction damper spring assembly, bottom basin assembly and side plate, the plane friction pair and all The rotating friction pair is arranged on the middle liner, the side plate is vertically fixed on the bottom basin assembly, the middle liner is parallel to the bottom basin assembly, and the bottom basin assembly is fixed with The guide shaft is provided with the first elastic body, and the two ends of the elastic body are respectively supported on the middle liner and the bottom basin assembly, and the middle liner is along the side plate When the inner wall slides up and down, the first elastic body is compressed to realize energy absorption and vibration reduction;

The fixed plate is arranged parallel to the side plate and is fixedly installed on the bottom basin assembly. Both sides of the friction copper plate assembly are slidably connected with the side plate and the fixed plate to form a plane friction pair. The top of the copper plate assembly contacts the middle liner, and when the liner pushes the friction copper plate assembly down, the plane friction pair absorbs the kinetic energy of the middle liner, and the friction damper spring assembly passes through the side plate, The friction copper plate assembly and the fixing plate are arranged for making the friction copper plate assembly close to the fixing plate;

The rotating shaft is vertically fixed on the middle liner, the top is inserted into the rotating friction pair to limit its displacement, and the friction damper spring assembly is horizontally arranged in the bottom pan assembly, perpendicular to the arrangement direction of the guide shaft, through friction The pretightening force is applied in the damper spring assembly to absorb the bridge kinetic energy when the plane friction pair works.

Further, the plane friction pair includes an upper bearing plate assembly and a plane wear plate, the rotating friction pair includes a spherical crown and a spherical wear plate, and the upper bearing plate assembly is slidably connected with the plane wear plate , the plane wear-resistant plate is arranged on the top of the spherical cap, the bottom of the spherical cap is rotatably connected with the spherical wear-resistant plate, and the spherical wear-resistant plate is arranged on the top of the intermediate liner.

Further, the rotating shaft includes a clamping seat and a rotating shaft, the clamping seat is fixed on one side of the intermediate liner, and the rotating shaft passes through the other side to fit with the bottom of the spherical cap in a clearance.

Further, it includes a pressure plate and a limiting plate, the limiting plate is bolted to the top of the side plate, and its bottom surface is in contact with the top surface of the intermediate liner, so as to limit the displacement of the intermediate liner, the The limiting plate is fixedly installed on the bottom basin assembly, and when the intermediate liner moves down, it contacts the limiting plate. The limiting plate acts as support and limiting. The pressing plate and the limiting plate limit the The minimum and maximum compression displacements of the first elastic body are described.

Further, the friction copper plate assembly includes a tension-compression plate and a wear-resistant plate, and the wear-resistant plates are respectively welded and fixed to both sides of the tension-compression plate along the centerline of the tension-compression plate, and the wear-resistant plates on both sides are respectively It is slidably connected with the fixing plate and the side plate.

Further, the friction damper spring assembly includes an anchor rod, a second elastic body, a pressure ring and a fixing nut, the anchor rod is slidably connected to the pressure ring, and the fixing nut is screwed to the anchor rod, so The second elastic body is sleeved on the anchor rod, the two sides of the pressure ring are respectively in contact with the fixing nut and the second elastic body, and the two ends of the second elastic body are respectively supported by the pressure ring. The outer side of the ring and the side plate, the anchor rod is set through the tension and compression plate and the side plate.

According to another aspect of the present invention, a method for using a frictional energy-dissipating wind-resistant bearing is provided, including the following steps:

S100, pre-compression of the support, pre-compression of the whole support after the assembly of all parts, the displacement stroke of the transverse bridge of the support is -S ₀ to S ₀ , and the first elastic body axially moves through the upper plate of the support by external force Pre-compress S ₁ , the range of S ₁ is 1.2S ₀ to 1.3S ₀ , and then use a temporary connecting plate to fix and connect the upper plate of the support and the bottom basin, and the elastic body is always in a compressed state during the normal operation of the support;

S200, apply pre-tightening force to the friction damper, by adjusting the position of the fixing nut and the pressure ring, support the two ends of the second elastic body on the pressure ring and the side plate, and apply the pre-tightening force on the friction damper assembly to F ₀ , the sliding friction force produced by a single friction damper assembly on the friction copper plate assembly and the fixed plate is f=N μ F ₀ (N is the number of friction pairs, the coefficient of sliding friction of μ friction pairs);

S300, install the support, connect the support cross bridge to the bottom basin assembly and the main beam with bolts, and weld the upper support plate assembly and the embedded plate in the bridge tower. After the support is installed, remove the temporary connecting plate and release The first elastic member, the support is restrained in the direction of the bridge, so that the main girder and the bridge tower are elastically connected;

S400, the displacement and rotation of the support, the longitudinal bridge and vertical displacement of the support are completed by the plane friction pair, that is, the plane wear-resistant plate and the upper support plate assembly are attached and slidably connected, and the horizontal plane rotation of the support is mainly completed by the rotating friction pair. The bottom of the spherical crown is attached to the spherical wear-resistant plate on the inner concave surface of the intermediate lining, the rotating shaft is fixed to the intermediate lining, and the rotating shaft is embedded in the bottom of the spherical crown to rotate with the rotating friction pair;

For S500, the bearing absorbs vibration and energy consumption in the direction of the bridge, and the wind-resistant bearing is installed symmetrically on both sides of the main girder. When the main girder moves in the direction of the bridge, the preloading and limiting measures of the bearing ensure that the elastic body of the bearing is always under compression state, S ₀ is the maximum compression displacement of the first elastic body, the force and displacement curve of the support is divided into two stages, when the displacement is greater than S ₀ , it is the second-order stiffness stage K ₂ of the support, and the displacement is less than S ₀ When is the first-order stiffness K ₁ stage of self-resetting, when the displacement is zero, it represents the initial displacement of the first elastic body after precompression, and the first elastic body of the support provides restoring force for the support within the stroke range, the first stage The frictional damper dissipates frictional energy during the horizontal displacement of the support, thereby reducing the vibration of the main girder in the horizontal direction and dissipating structural energy;

S600, replace the friction energy-dissipating element of the support. The friction element in the friction damper is set on the inside or outside of the bottom basin, and the installation and replacement space is reserved for later maintenance and replacement. When the friction element is replaced, use a temporary connection device to fix it on the support. Plate and bottom plate, then disassemble the pretensioning device of the friction damper energy dissipation component, replace the friction element, and remove the temporary connection device after the replacement to restore the normal function of the support.

Generally speaking, compared with the prior art, the above technical solutions conceived by the present invention can achieve the following beneficial effects:

1. The present invention provides a frictional energy-dissipating wind-resistant bearing, which includes a plane friction pair and a rotating friction pair, and also includes a rotating shaft, an intermediate liner, a guide shaft, a first elastic body, a friction damper spring assembly and a bottom basin Assemblies, a concave hole is provided in the center of the convex spherical surface of the spherical crown, and a rotating shaft is fixed in the center of the middle liner, which is inserted into the concave hole, so that the rotating shaft can adapt to the horizontal plane rotation of the support. On the bottom basin assembly, a guide shaft is also arranged on the assembly, and the first elastic body is set on the guide shaft, and the first elastic body adapts to the bridge displacement in the direction of the transverse bridge to absorb energy, and the friction damper spring assembly is horizontally arranged on the In the bottom basin assembly, it is perpendicular to the direction of the guide shaft arrangement. By applying pre-tightening force in the friction damper spring assembly to absorb the bridge kinetic energy when the plane friction pair is working, this support solves the problem of large wind-resistant displacement of the bridge and spherical cap. There is no problem with the anti-off function.

2. The present invention provides a frictional energy-dissipating wind-resistant support, which includes a bottom basin assembly, a guide shaft elastic body, and an intermediate liner. The guide shaft is vertically and fixedly installed on the inner bottom surface of the bottom basin assembly. Elastic body, the two ends of the elastic body are respectively supported on the middle liner and the bottom basin assembly. When the bridge moves in the direction of the bridge, the middle liner moves downward to compress the elastic body. The elastic body includes the first elastic body and the second elastic body. Body, the first elastic body plays the role of absorbing energy and promoting rebound.

3. The present invention provides a frictional energy-dissipating wind-resistant bearing, including a friction copper plate assembly and a friction damper spring assembly, wherein the friction copper plate assembly is arranged between the fixed plate and the side plate, and the friction damper spring assembly is arranged on the side plate On the outside, the anchor rod in this assembly passes through the side plate, the friction copper plate assembly and the fixed plate, and presses the wear plate in the friction copper plate assembly to the fixed plate, and the top of the wear plate is close to being pressed down by the middle liner When, it will push the wear-resistant plate to rub against the fixed plate, so as to play the role of frictional energy consumption.

4. The present invention provides a frictional energy-dissipating wind-resistant support, which includes a middle liner, a limit plate, a bottom basin assembly, side plates and a pressure plate, and the side plates are vertically fixed on the bottom basin assembly to form a box-like space. The middle liner covers the opening of the box-shaped space and can slide down along the side plates. A limit plate is fixed vertically on the basin assembly. When the middle liner moves down, the first elastic body is compressed, When the maximum compression displacement is reached, the limiting plate contacts the middle liner for support, which protects the first elastic body.

Description of drawings

Fig. 1 is a semi-sectional view in the transverse bridge direction of a frictional energy-dissipating wind-resistant bearing according to an embodiment of the present invention;

Fig. 2 is a half-sectional view in the front direction of a frictional energy-dissipating wind-resistant support according to an embodiment of the present invention;

Fig. 3 is a half-sectional view in the side view direction of a frictional energy-dissipating wind-resistant support according to an embodiment of the present invention;

Fig. 4 is a front view of a frictional copper plate assembly of a frictional energy dissipation type wind-resistant bearing according to an embodiment of the present invention;

Fig. 5 is a full cross-sectional view of a rotating shaft of a frictional energy dissipation type wind-resistant support according to an embodiment of the present invention;

Fig. 6 is a front view of a friction damper spring assembly of a frictional energy dissipation type anti-wind bearing according to an embodiment of the present invention;

Fig. 7 is a flow chart of the use of a frictional energy-dissipating wind-resistant bearing according to an embodiment of the present invention;

Fig. 8 is a force-displacement curve diagram of a frictional energy dissipation type wind-resistant bearing according to an embodiment of the present invention.

In all the drawings, the same reference numerals represent the same technical features, specifically: 1-upper bearing plate assembly, 2-plane wear plate, 3-spherical crown, 4-spherical wear plate, 5-rotation Shaft, 6-intermediate liner, 7-pressure plate, 8-limiting plate, 9-guiding shaft, 10-first elastic body, 11-fixing plate, 12-friction copper plate assembly, 13-friction damper spring assembly, 14 -Basin assembly, 15-side plate, 51-cassette, 52-rotating shaft, 121-tension plate, 122-wear plate, 131-anchor rod, 132-second elastic body, 133-pressure ring, 134-fixation nuts.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as there is no conflict with each other.

As shown in Figures 1 to 6, the present invention provides a frictional energy-dissipating wind-resistant support, which includes an upper support plate assembly 1, a flat wear-resistant plate 2, a spherical crown 3, a spherical wear-resistant plate 4, The rotating shaft 5, the intermediate lining plate 6, the guide shaft 9, the first elastic body 10, the friction damper spring assembly 13 and the bottom pan assembly 14, wherein the upper support plate assembly 1 is slidably connected with the plane wear-resistant plate 2 to form a plane The friction pair can slide freely along the longitudinal and vertical directions. The flat wear-resistant plate 2 is fixed on the flat side of the spherical crown 3. The other side of the spherical crown 3 is a convex spherical surface. This side is bonded with the spherical wear-resistant plate 4. The rotating connection forms a rotating friction pair, which meets the requirements of the horizontal angle of the bridge. The center of the convex spherical surface of the spherical crown 3 is provided with a concave hole, and the center of the middle liner 6 is fixed with a rotating shaft 5, and the rotating shaft 5 is inserted into the concave hole. , so that the rotating shaft 5 can adapt to the rotation in the horizontal plane of the support, and can also prevent the spherical cap 3 from falling off. Further, the intermediate liner 6 is fixed on the bottom basin assembly 14, and the assembly is also provided with a guide shaft 9. On the guide shaft 9 The first elastic body 10 is sleeved, through which the first elastic body 10 adapts to the bridge displacement in the transverse bridge direction, and acts as an energy absorber. The friction damper spring assembly 13 is horizontally arranged in the bottom basin assembly 14, perpendicular to the arrangement direction of the guide shaft 9, By applying a pre-tightening force in the friction damper spring assembly 13 to absorb the kinetic energy of the bridge when the plane friction pair is working, this support solves the problems of large wind-resistant displacement of the bridge and no anti-off function of the spherical crown.

Further, as shown in Figure 1, Figure 2 and Figure 6, the upper support plate 1 is fixedly connected to the bridge tower, preferably, the upper support plate assembly 1 is welded by the upper support plate and a stainless steel plate 12 , the stainless steel plate is in contact with the flat wear-resistant plate 2 to form a flat friction pair, which can be set in multiple groups according to the requirements of engineering damping force. Further, the flat side of the spherical crown 3 is provided with grooves, and the flat wear-resistant plate 2 is embedded in the groove, the convex spherical surface of the ball cap 3 fits with the concave surface of the intermediate lining plate 6, and a spherical wear-resistant plate 4 is fixed on the concave surface of the intermediate lining plate 6. The wear-resistant plate 4 and the spherical crown 3 Rotational connection, in order to meet the horizontal rotation of the bridge under normal working conditions, while restricting the spherical crown 3 to prevent it from falling off the support, a rotating shaft 5 is provided on the middle liner 6, and the section of the rotating shaft 5 is T-shaped. 5 includes a card seat 51 and a rotating shaft 52, the card seat 51 is larger in diameter than the rotating shaft 52, penetrates from the bottom of the middle liner 6 and fits with it, and the rotating shaft 52 extends upward from the card seat 51 through the concave surface of the middle liner 6, and then from the The convex spherical surface is inserted into the spherical cap 3 , preferably, it should penetrate from the apex of the convex spherical surface, and the rotating shaft 5 is provided to fasten the spherical cap 3 and the intermediate liner 6 .

Further, as shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 8, this support also includes a pressure plate 7, a limit plate 8 and a side plate 15, wherein the bottom pan assembly 14 is fixedly connected to the bridge girder Above, a plurality of side plates 15 are vertically and fixedly installed on the surface of the bottom basin assembly 14, and the side plates 15 and the bottom basin assembly 14 are enclosed to form a boxed structure. The side of the plate 15 and the surface of the bottom basin assembly 14 are used to strengthen the stability of the two. The middle liner 6 covers the opening of the boxed structure. In order to ensure the internal tightness and fix the middle liner 6, the middle liner 6 A pressure plate 7 is provided at the contact position between the periphery and the side plate 15, and the pressure plate 7 is fixedly installed on the top surface of the side plate 15 with bolts. Break out from the enclosed space of the bottom basin assembly 14 and the side plate 15, and further, the guide shaft 9 bolts are fixedly installed on the inner surface of the bottom basin assembly 14, and the top of the vertically installed guide shaft 9 is in contact with the middle liner 6, preferably Specifically, the bottom of the intermediate liner 6 is provided with a groove, and the groove fits with the top of the guide shaft 9 to restrain the displacement of each other. The guide shaft 9 is covered with a first elastic body 10. Preferably, the first elastic body 10 is Disc springs or ring springs can be used for the lateral stiffness and displacement requirements of the support. Further, a preload is applied to the first elastic body 10 to the required stroke of the design, so that the first elastic body 10 can It is in a compressed state, thereby providing a stable restoring force, and relying on the friction copper plate assembly 12 to dissipate energy, the pressure plate 7 limits the minimum compression displacement of the first elastic body 10, ensuring that the first elastic body 10 is always in a compressed state, and the limit plate 8 limits the maximum compression displacement of the first elastic body 10, and provides sufficient lateral stiffness for the support. Based on the above description, the force-displacement curve of the support is divided into two stages k1 and k2, where k1 is the first A stiffness curve, k2 is the second stiffness curve, S is the maximum compression displacement of the first elastic body 10, and the initial displacement after pre-compression is the zero point position in FIG. 8 . Further, the number of the first elastic body 10 is the same as that of the guide shaft 9, and its two ends are respectively supported on the bottom basin assembly 14 and the middle liner 6. The first elastic body 10 has the characteristics of high rigidity, and the displacement in the transverse direction of the bridge At the same time, after the middle liner 6 moves down along the inner wall of the side plate 15, the first elastic body 10 rebounds to reset it, so that the periphery of the middle liner 6 is close to the bottom surface of the pressure plate 7, In the middle of the bottom basin assembly 14, a limit plate 8 is also fixedly installed. The limit plate is arranged perpendicular to the bottom basin assembly 14, and the top is close to the middle liner 6. When the middle liner 6 is compressed, it can play a supporting role in the limit position, preventing the second An elastic body 10 is damaged due to excessive deformation.

Further, as shown in Figures 1-6, the support is fixed on the fixed plate 11 on the bottom basin assembly 14, the fixed plate 11 is arranged perpendicular to the bottom basin assembly 14, the fixed plate 11 is parallel to the side plate 15, both There is space for the friction copper plate assembly 12 to be installed between them. The friction copper plate assembly 12 includes a tension and compression plate 121 and a wear-resistant plate 122. The wear-resistant plate 122 is vertically welded and fixed on both sides of the tension and compression plate 121 along the centerline of the tension and compression plate 121. Preferably Specifically, a plurality of through holes are arranged on the tension and compression plate 121. Further, the wear plate 122 is in contact with the fixed plate 11, and the friction damper assembly 13 passes through the side plate 15, the fixed plate 11 and the tension and compression plate 121, so that the wear resistance The plate 122 is closely attached to the fixed plate 11. When the middle liner 6 moves down and touches the friction copper plate assembly 12, the friction copper plate assembly 12 is pushed to slide in the space between the fixed plate 11 and the side plate 15. At this time, the wear plate 122 and the The friction force of the fixed plate 11 acts as a brake. Preferably, the wear-resistant plate 122 can be replaced by friction elements made of other wear-resistant materials. According to the difference in durability of the materials used, it can be arranged on the inside or outside of the bottom basin, and it is reserved for installation. And the replacement space is convenient for the later replacement of friction elements.

Further, as shown in FIGS. 2-6 , the friction damper assembly 13 includes an anchor rod 131 , a second elastic body 132 , a compression ring 133 and a fixing nut 134 , wherein the second elastic body 132 is sleeved on the anchor rod 131 Above, an annular pressure ring 133 is provided on the anchor rod 131, and the pressure ring 133 is slidably connected or screwed to the anchor rod 131. Further, one side of the pressure ring 133 is in close contact with the second elastic body 132, and the other side is fixed Nut 134 resists, and fixed nut 134 is screwed with anchor rod 131, is used for adjusting the position of pressure ring 133, and described anchor rod 131 penetrates from the outside of side plate 15, passes through copper plate friction assembly 12 and fixed plate 11, the second The elastic body 132 and the pressure ring 133 are located outside the side plate 15, and the second elastic body 132 is supported on the side plate 15. Preferably, in order to ensure stability and better pressing effect, each friction copper plate assembly 12 is equipped with two friction The damper assembly 13 is compressed, and further, by adjusting the fixing nut 134 and the pressure ring 133, the second elastic body 132 can be compressed or loosened, thereby adjusting the compression force at the end of the anchor rod 131, and finally through the second elastic body The pretightening force of 132 ensures frictional energy dissipation between the wear-resistant plate 122 and the fixed plate 11. Preferably, the second elastic body 132 can adopt disc springs or ring springs according to the lateral stiffness and displacement requirements of the support.

As shown in Figures 1-8, according to another aspect of the present invention, the present invention provides a method for using a frictional energy dissipation type wind-resistant bearing, which specifically includes:

S100, support pre-compression;

Specifically, after the assembly of each component is completed, the support is pre-compressed as a whole, and the displacement stroke of the cross-bridge of the support is -S ₀ to S ₀ , and the first elastic body is pre-compressed S ₁ , the range of S ₁ is 1.2S ₀ to 1.3S ₀ , and then the upper plate of the support and the bottom basin are fixedly connected with a temporary connecting plate, and the elastic body is always in a compressed state during the normal operation of the support;

S200, apply preload to the friction damper;

Specifically, a preload is applied to the friction damper, and by adjusting the positions of the fixing nut and the pressure ring, the two ends of the second elastic body are supported on the pressure ring and the side plate, and the preload on the friction damper assembly is F ₀ , the sliding friction force generated by a single friction damper assembly on the friction copper plate assembly and the fixed plate is f=N μ F ₀ (N is the number of friction pairs, and the sliding friction coefficient of μ friction pairs);

S300, mounting bracket;

Specifically, bolts are used to connect the support cross bridge to the bottom basin assembly and the main beam, and the upper support plate assembly and the embedded plate in the bridge tower are fixed by welding. After the support is installed, the temporary connecting plate is removed and the elastic parts are released. The support is restrained in the direction of the bridge, so that the main girder and the bridge tower are elastically connected;

S400, support displacement and rotation;

Specifically, the longitudinal and vertical displacements of the support are completed by the plane friction pair, that is, the flat wear-resistant plate and the upper support plate assembly are attached and slidably connected, and the horizontal rotation of the support is mainly completed by the rotating friction pair. The spherical wear-resistant plate on the inner concave surface of the middle liner is fitted, the rotating shaft and the middle liner are fixed, the rotating shaft is embedded in the bottom of the spherical crown, and rotates with the rotating friction pair;

S500, vibration reduction energy consumption in the cross-bridge direction of the support;

Specifically, the wind-resistant support is installed symmetrically on both sides of the main girder. When the main girder moves in the transverse bridge direction, the support preload and limit measures ensure that the elastic body of the support is always in a compressed state, and S ₀ is the first elastic body Compress the maximum displacement, the force and displacement curve of the support is divided into two stages, when the displacement is greater than S ₀ , it is the second-order stiffness stage K ₂ of the support, and when the displacement is less than S ₀ , it is the first-order stiffness of self-resetting In stage K ₁ , when the displacement is zero, it represents the initial displacement of the first elastic body after precompression. The first elastic body of the support provides restoring force for the support within the stroke range. Frictional energy dissipation during lateral displacement, thereby reducing lateral vibration of the main girder and dissipating structural energy;

S600, replace the friction energy dissipation element of the support;

Specifically, the friction elements in the friction damper are arranged inside or outside the bottom basin, and space for installation and replacement is reserved for later maintenance and replacement. When the friction elements are replaced, a temporary connection device is used to fix the upper plate and the bottom plate of the support, and then disassemble the friction The pre-tensioning device of the energy-consuming component of the damper, replace the friction element, and remove the temporary connection device after the replacement is completed to restore the normal function of the support.

It is easy for those skilled in the art to understand that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention, etc., All should be included within the protection scope of the present invention.

Claims

A friction energy dissipation type wind-resistant support, characterized in that it includes a plane friction pair, a rotating friction pair, a rotating shaft (5), an intermediate liner (6), a guide shaft (9), a first elastic body (10) , a fixed plate (11), a friction copper plate assembly (12), a friction damper spring assembly (13), a bottom pan assembly (14) and a side plate (15), and the rotating friction pair is arranged on the middle lining plate (6 ), the side plates (15) are fixed vertically on the bottom basin assembly (14), the middle liner (6) is parallel to the bottom basin assembly (14), and the bottom basin assembly (14 ) is fixedly provided with the guide shaft (9), the guide shaft (9) is provided with the first elastic body (10), and the two ends of the elastic body are respectively supported on the middle liner (6) and On the bottom basin assembly (14), the middle liner (6) compresses the first elastic body (10) when sliding up and down along the inner wall of the side plate (15), so as to realize energy absorption and vibration reduction;

The fixed plate (11) is arranged parallel to the side plate (15), and is fixedly installed on the bottom basin assembly (14), and the two sides of the friction copper plate assembly (12) are connected to the side plate (15) and The fixed plate (11) is in sliding contact to form a plane friction pair, the top of the friction copper plate assembly (12) contacts the middle liner (6), and when the liner pushes the friction copper plate assembly (12) down, the The plane friction pair absorbs the kinetic energy of the middle liner (6), and the friction damper spring assembly (13) passes through the side plate (15), the friction copper plate assembly (12) and the fixed plate ( 11) setting, for making the friction copper plate assembly (12) close to the fixed plate (11);

The rotating shaft (5) is vertically arranged in the central through hole of the intermediate liner (6), the top is inserted into the rotating friction pair to limit its displacement, and the friction damper spring assembly (13) is horizontally arranged in the bottom basin In the component, perpendicular to the arrangement direction of the guide shaft, the function of sliding frictional energy dissipation is realized by applying pretightening force to the friction damper spring component (13).
A frictional energy-dissipating wind-resistant bearing according to claim 1, wherein the plane friction pair includes an upper bearing plate assembly (1) and a plane wear-resistant plate (2), and the rotating friction pair It includes a spherical cap (3), a spherical wear-resistant plate (4), the upper support plate assembly (1) is in sliding contact with the flat wear-resistant plate (2), and the flat wear-resistant plate (2) is arranged on the The top of the spherical cap (3), the bottom of the spherical cap (3) is in rotational contact with the spherical wear-resistant plate (4), and the spherical wear-resistant plate (4) is arranged on the intermediate liner (6) the top of.
A frictional energy dissipation type wind-resistant support according to claim 2, characterized in that, the rotating shaft (5) includes a card seat (51) and a rotating shaft (52), and the card seat (51) is arranged on One side of the intermediate liner (6), the rotating shaft (52) passes through the other side, and is connected and fixed with the bottom threaded hole of the spherical cap (3).
A frictional energy dissipation type wind-resistant bearing according to claim 1, characterized in that it comprises a pressure plate (7) and a limiting plate (8), and the limiting plate (8) is bolted to the side plate Inside (15), there is a certain gap between the top surface and the bottom surface of the intermediate liner (6), which is used to limit the overrun displacement of the intermediate liner (6), and the limit plate (8) is fixedly installed In the bottom basin assembly (14), when the middle liner (6) moves down, it contacts the limiting plate (8), and the limiting plate (8) acts as a support and a limiting function, and the pressing plate (7 ) and the limiting plate (8) respectively limit the minimum and maximum compression displacement of the first elastic body (10).
A friction energy dissipation type wind-resistant bearing according to claim 1, characterized in that, the friction copper plate assembly (12) includes a tension and compression plate (121), a wear plate (122), and the wear plate ( 122) along the center line of the tension and compression plate (121), respectively weld and fix on both sides of the tension and compression plate (121), the wear-resistant plates (122) on both sides are respectively connected with the fixed plate (11) and the Said side plate (15) is slidingly connected.
A friction energy dissipation type wind-resistant support according to claim 5, characterized in that, the friction damper spring assembly (13) includes an anchor rod (131), a second elastic body (132), a pressure ring ( 133) and fixing nut (134), the anchor rod (131) is slidingly connected with the pressure ring (133), the fixing nut (134) is screwed with the anchor rod (131), and the second elastic The body (132) is sleeved on the anchor rod (131), and the two sides of the pressure ring (133) are respectively in contact with the fixing nut (134) and the second elastic body (132). The two ends of the elastic body (132) are respectively in contact with the outside of the pressure ring (133) and the side plate (15), and the anchor rod (131) passes through the tension and pressure plate (121) and the side plate (15) )set up.
A method for using a frictional energy-dissipative wind-resistant bearing, characterized in that it is realized by applying a frictional energy-dissipative wind-resistant bearing and method according to any one of claims 1-6, comprising the following steps:

S100, pre-compression of the support, pre-compression of the whole support after the assembly of all parts, the displacement stroke of the transverse bridge of the support is -S 0 to S 0 , and the first elastic body axially moves through the upper plate of the support by external force Pre-compress S 1 , the range of S 1 is 1.2S 0 to 1.3S 0 , and then use a temporary connecting plate to fix and connect the upper plate of the support and the bottom basin, and the elastic body is always in a compressed state during the normal operation of the support;

S200, apply pre-tightening force to the friction damper, by adjusting the position of the fixing nut and the pressure ring, support the two ends of the second elastic body on the pressure ring and the side plate, and apply the pre-tightening force on the friction damper assembly to F 0 , the sliding friction generated by a single friction damper assembly on the friction copper plate assembly and the fixed plate is f=N·μ·F 0 ;

S300, install the support, connect the support cross bridge to the bottom basin assembly and the main beam with bolts, and weld the upper support plate assembly and the embedded plate in the bridge tower. After the support is installed, remove the temporary connecting plate and release The first elastic member, the support is restrained in the direction of the bridge, so that the main girder and the bridge tower are elastically connected;

S400, the displacement and rotation of the support, the longitudinal bridge and vertical displacement of the support are completed by the plane friction pair, that is, the plane wear-resistant plate and the upper support plate assembly are attached and slidably connected, and the horizontal plane rotation of the support is mainly completed by the rotating friction pair. The bottom of the spherical crown is attached to the spherical wear-resistant plate on the inner concave surface of the intermediate lining, the rotating shaft is fixed to the intermediate lining, and the rotating shaft is embedded in the bottom of the spherical crown to rotate with the rotating friction pair;

For S500, the bearing absorbs vibration and energy consumption in the direction of the bridge, and the wind-resistant bearing is installed symmetrically on both sides of the main girder. When the main girder moves in the direction of the bridge, the preloading and limiting measures of the bearing ensure that the elastic body of the bearing is always under compression state, S 0 is the maximum compression displacement of the first elastic body, the force and displacement curve of the support is divided into two stages, when the displacement is greater than S 0 , it is the second-order stiffness stage K 2 of the support, and the displacement is less than S 0 When is the first-order stiffness K 1 stage of self-resetting, when the displacement is zero, it represents the initial displacement of the first elastic body after precompression, and the first elastic body of the support provides restoring force for the support within the stroke range, the first stage The frictional damper dissipates frictional energy during the horizontal displacement of the support, thereby reducing the vibration of the main girder in the horizontal direction and dissipating structural energy;

S600, replace the friction energy-dissipating element of the support. The friction element in the friction damper is set on the inside or outside of the bottom basin, and the installation and replacement space is reserved for later maintenance and replacement. When the friction element is replaced, use a temporary connection device to fix it on the support. Plate and bottom plate, then disassemble the pretensioning device of the friction damper energy dissipation component, replace the friction element, and remove the temporary connection device after the replacement to restore the normal function of the support.