CN109057392B - Construction method of steel structure for reinforcement - Google Patents
Construction method of steel structure for reinforcement Download PDFInfo
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- CN109057392B CN109057392B CN201810995893.6A CN201810995893A CN109057392B CN 109057392 B CN109057392 B CN 109057392B CN 201810995893 A CN201810995893 A CN 201810995893A CN 109057392 B CN109057392 B CN 109057392B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G23/0237—Increasing or restoring the load-bearing capacity of building construction elements of storey floors
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0288—Repairing or restoring floor slabs
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Abstract
The invention discloses a construction method of a steel knot for reinforcement, which is mainly applied to the reinforcement and reconstruction of building structures in the technical field of building science. The structure of the concrete floor comprises steel plates, wherein the steel plates comprise a plate top steel plate and a plate bottom steel plate, the plate top steel plate is positioned on the top surface of the concrete floor, the plate bottom steel plate is positioned on the bottom surface of the concrete floor, the plate top steel plate and the plate bottom steel plate are aligned in the longitudinal direction, and the plate top steel plate and the plate bottom steel plate are fixedly arranged at the edge of a hole-opened part on the concrete floor to realize the reinforcement of the concrete floor; and a rigid connecting device for connecting the top steel plate and the bottom steel plate is arranged between the top steel plate and the bottom steel plate. The steel structure space system is combined with the concrete floor into a whole, the anchoring effect is good, and the bearing capacity and the rigidity can be improved to a great extent; the construction and installation are convenient, and the problem of steel plate anchoring is solved; the use space is not occupied, the steel consumption is less and the cost is low.
Description
Technical Field
The invention relates to the technical field of building science, in particular to a construction method of a steel knot for reinforcement, which is mainly applied to reinforcement and transformation of a building structure.
Background
In concrete structure engineering reinforcement and reconstruction projects, holes are required to be formed in concrete floors sometimes due to the consideration of installation equipment, post-addition of stairs and the like. The floor slab is provided with holes, so that the integrity of the original floor slab is damaged, and the bearing capacity of the floor slab is reduced; and the installed equipment, stairs and the like increase the load on the floor slab, and the safety and the applicability of the structure can be ensured only by reinforcing.
In the national standard 'concrete structure design code' GB50010-2010, for new construction, when a hole is reserved on a concrete cast-in-place slab, reinforcing bars are generally required to be additionally arranged on the periphery of the hole, and when the hole is large, a concrete beam can be additionally arranged.
No treatment method for a post-arranged hole is adopted in the national standard GB50367-2013, and only a section enlarging method and a surface steel plate or composite fiber material (FRP) pasting method can be applied to the existing reinforcing method.
In the existing reinforcing method, a method for reinforcing a section steel beam is added, section steel is arranged at the bottom of a plate and is used for bearing load transmitted by a plate surface, the bearing capacity of the structure can be improved, but the method reduces the use clearance, and supports are required to be added at two ends of the section steel beam.
In the existing reinforcing method, a steel plate is adhered to the surface of a plate, in the method, the top and/or bottom steel plates of the plate deform along with the deformation of the plate and generate certain tensile pressure to improve the bearing capacity of the plate, but in the method, the steel plate deforms only depending on the deformation of a floor slab, a relatively independent space system cannot be formed, the influence on the increase of the rigidity of the floor slab is small, and the degree of improving the bearing capacity is limited.
The method of increasing the cross section inevitably sacrifices the use space, the methods of surface pasting and the like slightly increase the rigidity of the floor slab, and the improvement of the bearing capacity is limited.
The existing roof reinforcing and leakage preventing device adopts a roof leakage preventing technology to fully utilize a wafer type flange to reinforce a roof, so that the edge cut by a hole is converted from line contact into surface contact, the contact area is increased, and the aims of pressure resistance and leakage prevention of a plate type roof are fulfilled; in the existing construction method for opening the prestressed floor slab in the structural reinforcement project, a steel member support pad is additionally arranged on the inner side of a newly-added hole, an anchorage device is installed and tensioned, and the steel member support pad is used for cutting and anchoring prestressed tendons when the prestressed floor slab is opened; in the prior art, holes are drilled on a shear wall, angle steel is adopted for reinforcement and transformation, but the stress of the shear wall is different from that of a floor slab, and the transformation method can not well solve the problem of stress concentration caused by the drilled holes on two sides of the floor slab.
None of the above prior art techniques can serve to reinforce a floor slab, increase its load bearing capacity, and help to eliminate pre-stress.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a steel structure space system for reinforcement and a construction method, in order to make up the deficiency of bearing capacity of a concrete floor after a hole is formed in the concrete structure reinforcement and reconstruction and ensure the structural safety and the applicability of the concrete floor after the hole is formed.
The technical scheme adopted by the invention for solving the technical problem comprises the following steps: a steel structure space system for reinforcement comprises steel plates, wherein the steel plates comprise a plate top steel plate and a plate bottom steel plate, the plate top steel plate is located on the top surface of a concrete floor, the plate bottom steel plate is located on the bottom surface of the concrete floor, the plate top steel plate and the plate bottom steel plate are aligned in the longitudinal direction, and the plate top steel plate and the plate bottom steel plate are fixedly installed at the edge of a hole formed in the concrete floor to realize reinforcement of the concrete floor; the rigid connection device is arranged between the plate top steel plate and the plate bottom steel plate and is used for connecting the plate top steel plate and the plate bottom steel plate, two bolt caps which are arranged in an up-down symmetrical mode are arranged on the rigid connection device and are embedded in a concrete floor, the size of one end, close to the top surface or the bottom surface of the floor, of each bolt cap is larger than that of the other end, the bolt caps are specially arranged for reducing the stress concentration phenomenon of the joint, and due to the fact that the holes are formed, the stress of the concrete floor around the holes is concentrated, particularly the top and the bottom of the floor are arranged, the bolt caps with one ends larger than the other ends are adopted, the stress is well dispersed to a steel structure space system through the bolt caps, and the.
From the viewpoints of economy, practicability, connection reliability and the like, the further technical scheme is as follows: the rigid connection device is a steel bolt, threads are arranged at two ends of the steel bolt, the steel bolt penetrates through the plate top steel plate, the concrete floor and the plate bottom steel plate simultaneously, and two ends of the steel bolt are locked through nuts.
The further technical scheme is as follows: the joint of steel sheet and steel bolt is equipped with the cap of tieing respectively, the cap of tieing is the toper connecting piece between steel sheet and steel bolt, the cap of tieing is established in one side relative with the nut, and for processing convenience, the cap of tieing can be the toper, and the outward appearance is equipped with decorative pattern or screw thread in order to increase the area of contact with the floor.
In order to further restrain the relative displacement between the steel plate and the concrete floor and avoid the slipping damage between the steel plate and the concrete floor, the further technical scheme is as follows: the joint of the steel plate and the concrete floor slab is provided with structural adhesive, and structural adhesive is arranged in a gap between the steel bolt and the concrete floor slab.
The further technical scheme is as follows: the steel plates are arranged along the opening part of the concrete floor in a one-way or two-way mode. When the concrete floor is designed according to the unidirectional slab, a steel structure space system which is arranged in a unidirectional way can be adopted, namely the steel plates are arranged along the calculation span direction of the concrete floor on two sides of the opening part; when the concrete floor is designed according to bidirectional plates, a steel structure space system arranged in two directions can be adopted, namely, the transverse steel plates and the longitudinal steel plates are arranged along the periphery of the opening part of the concrete floor at the same time.
In order to ensure the reliability of the reinforcing effect, the further technical scheme is as follows: and two ends of the steel plate extend to the end part of the concrete floor where the steel plate is positioned.
The steel plate for reinforcement is preferably a strip steel belt.
The technical scheme for solving the technical problem of the invention also comprises the following steps: a construction method of a steel structure space system for reinforcement comprises the following steps:
step 1): arranging a positioning line of a steel plate mounting position on the outer side of a hole on the concrete floor;
step 2): arranging steel plates on the top surface and the bottom surface of the concrete floor according to the positioning lines, wherein the steel plate on the top surface of the floor is a plate top steel plate, and the steel plate on the bottom surface of the floor is a plate bottom steel plate;
step 3): the plate top steel plate, the concrete floor and the plate bottom steel plate are fixedly connected into a whole through the rigid connecting device.
The further technical scheme is as follows: the slab top steel plate, the concrete floor slab and the slab bottom steel plate are connected through steel bolts and structural adhesive, and the connecting method comprises the following steps:
step a: drilling holes at positions on the concrete floor where steel plates need to be installed, and drilling holes with the same diameter and spacing on the steel plates;
step b: grinding the position of the concrete floor where the steel plate needs to be installed to meet the requirement of adhering the steel plate;
step c: removing rust on the sticking surface of the steel plate;
step d: the method comprises the following steps of adhering a bottom steel plate, connecting a steel bolt with the bottom steel plate by adopting a conical bolt cap, injecting structural adhesive between the steel bolt and a hole for installing the steel bolt on a concrete floor, adhering a top steel plate, and connecting the steel bolt with the top steel plate by adopting the bolt cap, wherein the bolt cap is a conical connecting piece between the steel plate and the steel bolt.
In order to exert the best reinforcing effect, the further technical scheme is as follows: the positioning line is positioned at the position of 50-100 mm outside the position of the opening on the concrete floor.
In order to ensure that the drilling process is not influenced by the existing steel bars, the further technical scheme is as follows: in the step a, the aperture of the hole drilled in the concrete floor is 4-6 mm larger than the diameter of the steel bolt, and the distance is 1-3 times of the distance between the steel bars in the concrete floor.
The invention has the beneficial effects that:
1. the steel structure space system and the concrete floor are combined into a whole through the rigid connecting device, the anchoring effect is good, and the bearing capacity and the rigidity can be improved to a great extent; meanwhile, the construction method of the invention has strong operability and convenient installation, solves the problem of steel plate anchoring, does not increase the section of the concrete floor slab, does not occupy the use space, uses less steel and has low cost.
2. The rigid connecting device effectively restrains the relative displacement between the steel plate and the concrete, and the structural adhesive is arranged to avoid the slippage and damage between the steel plate and the concrete.
3. The steel structure space system is simple in structure, the problem of stress concentration of the floor slabs in the middle of two sides of the hole due to excavation of the hole can be well solved by adopting the conical bolt caps, and the steel structure space system is easy to popularize and implement.
Drawings
FIG. 1 is a front view of an embodiment of the present invention;
FIG. 2 is a schematic perspective view of an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of an assembled steel plate and concrete floor slab according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a unidirectional arrangement of an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a bi-directional arrangement according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a steel plate according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a steel bolt, a bolt cap and a nut according to an embodiment of the invention;
FIGS. 8(a) -8 (d) are force analysis diagrams of embodiments of the present invention;
FIG. 9 is a load-deflection plot for an example of the present invention.
In the figure: 1 steel plate, 2 steel bolts, 3 bolt caps, 4 nuts, 5 concrete floors, 6 holed parts and 7 mounting holes.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1, fig. 2 and fig. 3, a steel structure space system for reinforcement includes steel sheet 1, the steel sheet includes steel sheet at the bottom of the board top steel sheet and the board, the board top steel sheet is located concrete floor 5's top surface, the steel sheet is located concrete floor 5's bottom surface at the bottom of the board, board top steel sheet and board bottom steel sheet align on vertical, board top steel sheet and board bottom steel sheet fixed mounting are in concrete floor 5 goes up the edge of trompil position 6 and is in order to realize concrete floor 5's reinforcement.
The steel plate 1 and the concrete floor 5 are connected through the steel bolts 2, the bolt caps 3 and the nuts 4, as shown in fig. 6, the steel plate 1 is provided with mounting holes 7 for the steel bolts 2 to pass through, and meanwhile, the concrete floor 5 is also provided with holes for the steel bolts 2 to pass through. As shown in fig. 7, the steel bolt 2 is a stud, the nut 4 is provided with a thread matched with the steel bolt 2, the steel bolt 2 simultaneously penetrates through the plate top steel plate, the concrete floor 5 and the plate bottom steel plate and is locked at two ends by the nut 4, the bolt cap 3 is a conical connecting piece between the steel plate 1 and the steel bolt 2, the stress concentration phenomenon at the connecting part can be reduced, and the bolt cap 3 is arranged at one side opposite to the nut 4.
The joint of the steel plate 1 and the concrete floor 5 is provided with structural adhesive, and the gap between the steel bolt 2 and the concrete floor 5 is filled with the structural adhesive. The steel structure space system is tightly combined with the concrete floor 5 through the structural adhesive and the steel bolts 2 to form a commonly stressed whole, and the structural bearing capacity and the rigidity are greatly improved.
When the concrete floor 5 is designed as a unidirectional slab, a steel structure space system with unidirectional arrangement can be adopted, namely unidirectional arrangement, namely steel plates are transversely or longitudinally arranged along any two opposite edges of the opening part 6 of the concrete floor 5, as shown in fig. 4; when the concrete floor is designed as 5 bidirectional plates, a steel structure space system with bidirectional arrangement can be adopted, namely, the transverse steel plates and the longitudinal steel plates are simultaneously arranged along the periphery of the opening part 6 of the concrete floor 5, as shown in figure 5.
The two ends of the steel plate 1 extend to the end part of the concrete floor 5 where the steel plate 1 is located, and a strip-shaped steel strip is preferably used as the steel plate 1 for reinforcement.
The construction method of the embodiment comprises the following steps:
firstly, reinforcement preparation is carried out:
step 1): positioning a position to be punched of the concrete floor 5, and determining the specification, the model, the quantity and the sectional area of the longitudinal and transverse reinforcing steel bars when the concrete floor 5 is punched by referring to drawings and site survey;
step 2): determining the sectional area of the steel plate at the bottom of the plate according to the principle of equal-strength substitution in the longitudinal direction and the transverse direction and by considering the weakening influence of the drilled holes of the steel plate 1 and certain safety redundancy;
step 3): the specification and the sectional area of the plate top steel plate are configured the same as those of the plate bottom steel plate;
step 4): the two ends of the newly added plate bottom steel plate and the plate top steel plate extend to the end part of the concrete floor 5.
After the reinforcement preparation is completed, the installation of a space system is carried out:
step 5): the method comprises the steps that a positioning line of the installation position of a steel plate 1 is arranged at the position 50-100 mm outside a hole opening part 6, a hole is drilled perpendicular to a concrete floor 5, the hole diameter is 4-6 mm larger than the diameter of a steel bolt 2, the distance is 1-3 times of the distance between steel bars in a concrete slab, generally 150-400 mm is adopted, and the influence of the existing steel bars in the drilling process is avoided;
step 6): grinding the position of the concrete floor 5 where the steel plate 1 needs to be installed to meet the requirement of adhering the steel plate 1;
step 7): the top surface and the bottom surface of the floor slab at the periphery of the opening part 6 are both provided with steel plates 1, and a plurality of steel bolts 2 penetrating through a concrete floor slab 5 are adopted to connect the upper layer steel plate 1 and the lower layer steel plate 1, the section size and the length of the steel plates 1 are related to the span of the floor slab and the opening size of the floor slab, and the steel plates are determined by calculation so as to ensure that the bending resistance bearing capacity and the bending resistance rigidity of a steel structure space system are not less than those of the original concrete floor slab at the opening;
step 8): drilling holes in the steel plate 1 so as to install the steel bolts 2, wherein the diameter and the distance of the installation holes 7 drilled in the steel plate 1 are equal to those of the holes drilled in the concrete floor 5 in the step 5), and removing rust on the adhering surface of the steel plate;
step 9): preparing structural adhesive, wherein the structural adhesive is prepared by adopting the existing structural adhesive according to the use instruction;
step 10): evenly paint the structure and glue on pasting the face, paste the steel sheet at the bottom of the board, adopt cap 3 to be connected steel peg 2 with the steel sheet at the bottom of the board, then pour into the structure to glue between diaphragm orifice and steel peg 2, paste the board top steel sheet again to adopt cap 3 to connect steel peg 2 and board top steel sheet, form steel construction space system, utilize steel construction space system to open the concrete floor 5 after the hole and consolidate.
The stress situation of the present invention is analyzed below, and the stress analysis is illustrated by a space system arranged in a single direction, and the form of the reinforcing structure is shown in fig. 4:
assuming that the thickness of the floor slab is h, for calculating the span direction (the length direction of the concrete floor slab), the width of the opening of the hole is B, and the sectional area of the cut-off main rib is nAsComparing the bearing capacity change and rigidity change after the floor slab is provided with the hole and reinforced by the invention.
Firstly, bearing capacity variation:
the loss of the bending resistance bearing capacity of the floor slab after the hole is opened is about:
M0＝0.85fy·nAs·h0
in the formula: f. ofyThe tensile strength of the steel bars in the concrete floor 5;
h0the calculated thickness of the concrete floor, i.e. the distance from the slab top to the centroid of the rebar.
When a steel structure space system is adopted, the type of the steel plate is-txb (-representing the steel plate, t represents the thickness, and b represents the width), the two steel plates at the bottom of the two side plates of the opening are totally two, and the bearing capacity can be improved as follows:
in the formula: f represents the tensile strength of the steel sheet 1.
Secondly, rigidity change:
the rigidity of the original concrete floor slab of the removed opening is as follows without considering the beneficial effect of the steel bars:
in the formula: ecThe modulus of elasticity of the concrete floor slab;
I0the converted section moment of inertia of the concrete floor is used.
By taking the steel plate 1 as an example, when a steel structure space system is adopted, the type of the steel plate is-b x t, the steel plate 1 has four blocks, and the rigidity provided by the steel plates 1 on two sides of the opening is as follows:
in the formula: esIs the modulus of elasticity of the steel plate;
I1the converted moment of inertia of the cross section of the space system formed by the steel plate.
Thirdly, reinforcement requirement:
the bearing capacity and the rigidity improved after the reinforcement are not less than the bearing capacity and the rigidity of the original concrete floor slab with the demolished hole. For a unidirectional sheet, only a single direction of force may be considered; for a bi-directional plate, forces in both span directions should be considered.
Namely: the steel structure space system for reinforcement that sets up needs the condition that satisfies to be:
M1≥M0；
Es·I1≥Ec·I0
when the sectional size and length of the steel sheet are determined, the steel sheet may satisfy the conditions.
The following describes the present invention with reference to the implementation effect of the present invention, still taking the space system with unidirectional arrangement as an example:
firstly, experimental research:
the span of the concrete floor slab is 4200mm, and the width is 2000 mm. C30 concrete is adopted, the plate thickness is 120mm, and the internal reinforcement is 10@100 (the diameter of the steel bar is 10mm, and the distance between the steel bars is 100 mm). The width of the planned opening is 1000mm, the length (span direction) is 2000mm, and the stress of the unidirectional plate is considered. And reinforcing by adopting a steel structure space system, wherein the steel plate is Q235, and the size is-t × b-10 × 150.
Calculating and analyzing:
1. weakening condition of the floor slab after the hole is opened:
as shown in fig. 8(a), the concrete floor flexural capacity loss is about:
M0＝0.85fy·nAs·h0＝0.85×300×10×78.5×90＝18,015,750N·mm
as shown in fig. 8(b), the flexural rigidity loss of the concrete floor is about:
2. and reinforcing by adopting a steel structure space system, wherein the type of the steel plate is-t multiplied by b-10 multiplied by 120.
As shown in fig. 8(c), the steel plates on both sides of the opening part 6 (two steel plates at the bottom of the plate) can improve the bearing capacity:
as shown in fig. 8(d), the bottom and the top of the steel plate are four, and the rigidity provided by the steel plates at the two sides of the opening is:
(II) measured data
The test piece of this test totally has three, according to the unilateral board consideration, the clear span is 4200mm, the board width is 2000mm, the board is 120mm thick. The test piece A is a perfect concrete floor; the test piece B is a concrete floor slab with a hole in the center, the span direction is 2000mm, the slab width direction is 1000mm, and no reinforcing measures are taken; the test piece C is a concrete floor slab reinforced by the steel structure space system based on the test piece B, the model of the steel plate for reinforcement adopted in the test piece C is Q235, and the size is-t × B-10 × 150.
And (3) testing the bearing capacity and deflection deformation conditions of the three test pieces by adopting a plate top graded loading mode.
1. The load bearing situation is shown in the following table:
| name of test piece | Test piece A | Test piece B | Test piece C |
| Breaking load kN/m | 16.0 | 10.5 | 35.5 |
2. The deflection deformation is shown in figure 9.
Secondly, analyzing and concluding:
through the calculation and analysis, after the reinforcing and reinforcing method is adopted for reinforcing, the bearing capacity of the test piece C is improved by 250% compared with that of the unreinforced test piece B, and is improved by 100% compared with that of the concrete floor (test piece A) without the hole; under the original design load of the plate (about 8kN/m), the deflection is 11 percent of that of the test piece A and 42 percent of that of the test piece B. The bearing capacity and the rigidity are both greater than those of the concrete floor before the hole is opened, and the safe use requirement can be met.
The stress analysis of the bidirectional plate is the same as that of the bidirectional plate, and is not repeated.
The structural adhesive in the invention is not limited to the structural adhesive described in the embodiment, and other building adhesives can be adopted.
The above description is only exemplary of the present invention, and not intended to limit the present invention, and any modifications, equivalents, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Other technical features than those described in the specification are known to those skilled in the art, and are not described in detail herein in order to highlight the novel features of the present invention.
Claims (3)
1. A construction method of a steel structure space system for reinforcement is characterized by comprising the following steps:
step 1): arranging a positioning line of a steel plate mounting position on the outer side of a hole on the concrete floor;
step 2): arranging steel plates on the top surface and the bottom surface of the concrete floor according to the positioning lines, wherein the steel plate on the top surface of the floor is a plate top steel plate, and the steel plate on the bottom surface of the floor is a plate bottom steel plate;
step 3): fixedly connecting the plate top steel plate, the concrete floor and the plate bottom steel plate into a whole through a rigid connecting device;
the slab top steel plate, the concrete floor slab and the slab bottom steel plate are connected through steel bolts and structural adhesive, and the connecting method comprises the following steps:
step a: drilling holes at positions on the concrete floor where steel plates need to be installed, and drilling holes with the same diameter and spacing on the steel plates;
step b: grinding the position of the concrete floor where the steel plate needs to be installed to meet the requirement of adhering the steel plate;
step c: removing rust on the sticking surface of the steel plate;
step d: the method comprises the following steps of adhering a steel plate at the bottom of a plate, connecting the steel bolt with the steel plate at the bottom of the plate by adopting a conical bolt cap, injecting structural adhesive between the steel bolt and a hole for installing the steel bolt on a concrete floor, adhering a steel plate at the top of the plate, connecting the steel bolt with the steel plate at the top of the plate by adopting the bolt cap, wherein the bolt cap is a conical connecting piece between the steel plate and the steel bolt, and patterns or threads are arranged on the outer surface of the bolt cap.
2. The construction method according to claim 1, wherein the positioning line is located at a position 50mm to 100mm outside the portion of the concrete floor where the hole is formed.
3. The construction method according to claim 1, wherein in the step a, the hole drilled in the concrete floor has a diameter 4mm to 6mm larger than that of the steel bar, and the spacing is 1 to 3 times of the spacing between the steel bars in the concrete floor.
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| CN107338861B (en) * | 2016-11-22 | 2019-08-02 | 浙江绿筑集成科技有限公司 | The method for improving staggered truss chord member part anti-bending bearing capacity |
| CN107100376A (en) * | 2017-04-15 | 2017-08-29 | 福州大学 | Superstructure reinforcing device and its construction method |
| CN108678417B (en) * | 2018-07-31 | 2023-07-21 | 天津市建筑设计院 | Steel construction floor reforms transform node |
| CN110284728B (en) * | 2019-07-19 | 2023-12-29 | 华侨大学 | Slab-column structure floor reinforcing structure capable of preventing impact cutting damage and construction method thereof |
| CN112431436B (en) * | 2020-12-14 | 2022-10-21 | 东莞理工学院 | Anti-punching reinforcement construction method for flat slab |
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| CN104179364B (en) * | 2014-07-24 | 2016-06-29 | 北京筑福国际工程技术有限责任公司 | Punch after a kind of shear wall ruggedized construction and construction method thereof |
| CN104763161B (en) * | 2014-09-24 | 2017-05-31 | 温州振华建设有限公司 | Punched after a kind of reinforced concrete floor and add the construction method of beam reinforced structure |
| CN204703495U (en) * | 2015-04-01 | 2015-10-14 | 广东合迪科技股份有限公司 | Aluminum alloy pattern plate back cord system |
| CN205476581U (en) * | 2016-04-15 | 2016-08-17 | 山东省建筑科学研究院 | Consolidate and use steel construction three -dimensional system |
-
2016
- 2016-04-15 CN CN201610237156.0A patent/CN105863289B/en not_active Expired - Fee Related
- 2016-04-15 CN CN201810995893.6A patent/CN109057392B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN105863289B (en) | 2018-10-02 |
| CN109057392A (en) | 2018-12-21 |
| CN105863289A (en) | 2016-08-17 |
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