CN117432101B - Assembled CFRP-slotted steel plate shear wall structure and assembling method thereof - Google Patents
Assembled CFRP-slotted steel plate shear wall structure and assembling method thereof Download PDFInfo
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- CN117432101B CN117432101B CN202311768849.9A CN202311768849A CN117432101B CN 117432101 B CN117432101 B CN 117432101B CN 202311768849 A CN202311768849 A CN 202311768849A CN 117432101 B CN117432101 B CN 117432101B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 246
- 239000010959 steel Substances 0.000 title claims abstract description 246
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000004918 carbon fiber reinforced polymer Substances 0.000 claims abstract description 135
- 239000004744 fabric Substances 0.000 claims abstract description 57
- 230000007246 mechanism Effects 0.000 claims description 28
- 230000002787 reinforcement Effects 0.000 claims description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 239000003822 epoxy resin Substances 0.000 claims description 11
- 229920000647 polyepoxide Polymers 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 5
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 description 13
- 238000005452 bending Methods 0.000 description 11
- 230000009471 action Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 6
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011208 reinforced composite material Substances 0.000 description 1
- 230000035939 shock Effects 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
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
-
- 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
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
- E04B2/58—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
- E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
- E04C2/292—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and sheet metal
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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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses an assembled CFRP-slotted steel plate shear wall structure and an assembly method thereof, and relates to the field of shear walls, wherein the shear wall structure comprises a frame structure formed by sequentially enclosing a first frame beam, a first frame column, a second frame beam and a second frame column, and further comprises a first slotted steel plate and a second slotted steel plate which are connected inside the frame structure, wherein the slotting directions of the first slotted steel plate and the second slotted steel plate are the same; a CFRP cloth is clamped between the first slotted steel plate and the second slotted steel plate; and CFRP plates are paved on one side surface of the first slotted steel plate, which is away from the second slotted steel plate, and one side surface of the second slotted steel plate, which is away from the first slotted steel plate. The invention provides an assembled CFRP-slotted steel plate shear wall structure and an assembly method thereof, which aim to solve the problem that the slotted steel plate shear wall in the prior art is relatively insufficient in anti-seismic performance and realize the purpose that the slotted steel plate shear wall is more suitable for earthquake-prone areas.
Description
Technical Field
The invention relates to the field of shear walls, in particular to an assembled CFRP-slotted steel plate shear wall structure and an assembly method thereof.
Background
With the development of socioeconomic performance and productivity, steel construction foundations have made rapid progress in the civil engineering direction. The steel plate shear wall belongs to an efficient energy-consuming and shock-absorbing component, and under the action of an earthquake, the steel plate is filled in to form a symmetrical oblique tension belt which resists horizontal load together with the main body. The sheet steel shear wall has the characteristics of light dead weight, high lateral rigidity, good economy, high bearing capacity and the like, and is widely applied to multi-story and high-rise residential structures.
Along with the increase of steel plate shear wall buildings and the increase of service time, the problems of the steel plate shear wall in actual engineering are also revealed: in the transportation process, the steel plate shear wall member is easy to deform due to the factors of improper placement, collision and the like; the steel structure is often applied to a frequent earthquake area, and after an earthquake, the structure can not meet the earthquake-resistant performance requirement and needs to be replaced integrally; under the action of horizontal load, the non-stiffened thin steel plate is easy to deform out of plane, so that the rigidity of the frame column is degraded, and large buckling noise is generated; part of steel plate shear wall buildings cannot meet the standard of earthquake resistance identification and reinforcement of the current national buildings.
In recent years, a steel plate shear wall with slits is proposed and gradually introduced into practical engineering application. When the slotted steel plate shear wall is used as a side force resisting component, the tensile force belt is not formed to generate additional bending moment on the column, and the stress deformation performance of the slotted steel plate shear wall is improved through the bending of the wall limbs between the adjacent vertical slots, so that the energy consumption capacity and the ductility of the slotted steel plate shear wall are improved. But the rigidity, the out-of-plane stability and the ultimate bearing capacity of the slotted steel plate shear wall are reduced due to the slotting. Chinese patent CN220014106U filed earlier by the applicant discloses "a ribbed CFRP-unequal height slotted steel plate shear wall", which improves the ultimate bearing capacity and fatigue resistance of the slotted steel plate shear wall by providing a ribbed carbon fiber reinforced composite material flush with the slots on the surface of the slotted steel plate; however, with the continuous and intensive research, the applicant finds that in order to ensure the energy consumption performance of the middle wall limb, the structure has limited reinforcing effect on the whole shear wall, and relatively insufficient earthquake-resistant performance, and is difficult to be applied to the steel structure building in the earthquake-prone area.
Disclosure of Invention
The invention provides an assembled CFRP-slotted steel plate shear wall structure and an assembly method thereof, which aim to solve the problem that the slotted steel plate shear wall in the prior art is relatively insufficient in anti-seismic performance and realize the purpose that the slotted steel plate shear wall is more suitable for earthquake-prone areas.
The invention is realized by the following technical scheme:
the assembled CFRP-slotted steel plate shear wall structure comprises a frame structure formed by sequentially enclosing a first frame beam, a first frame column, a second frame beam and a second frame column, and further comprises a first slotted steel plate and a second slotted steel plate which are connected inside the frame structure, wherein the slotting directions of the first slotted steel plate and the second slotted steel plate are the same; a CFRP cloth is clamped between the first slotted steel plate and the second slotted steel plate; and CFRP plates are paved on one side surface of the first slotted steel plate, which is away from the second slotted steel plate, and one side surface of the second slotted steel plate, which is away from the first slotted steel plate.
The inventor finds that in the intensive research process, as the two-sided connection structure is adopted in the slotted steel plate shear wall in the prior art, the mechanical property can be greatly reduced, and particularly when a high intensity earthquake occurs, the integral instability phenomenon is easy to occur when the middle wall limb does not reach the full energy consumption, and the traditional slotted steel plate shear wall is difficult to be suitable for the earthquake high-rise area, so the invention provides an assembled CFRP-slotted steel plate shear wall structure, wherein the frame structure is formed by encircling a first frame beam, a first frame column, a second frame beam and a second frame column. The CFRP cloth is clamped between the two slotted steel plates, and the CFRP plates are paved on the outer sides of the two slotted steel plates. It should be understood by those skilled in the art that CFRP is a carbon fiber reinforced matrix composite, CFRP cloth is a cloth made of a carbon fiber reinforced matrix composite, and CFRP plates are plates made of a carbon fiber reinforced matrix composite.
The CFRP cloth and the CFRP plate are combined for common use in the field of slotted steel plate shear walls, the overall shear capacity of the shear wall can be remarkably improved through the CFRP cloth clamped between the two slotted steel plates, and the overall tensile capacity of the shear wall can be remarkably improved through the CFRP plates paved on the outer surfaces of the two sides of the slotted steel plates, so that under the earthquake action, the CFRP cloth and the CFRP plate cooperate with the two slotted steel plates to jointly bear shear loads, the overall rigidity loss of the slotted steel plates is effectively reduced, the overall deformation of the slotted steel plates is restrained, premature buckling is prevented, and the earthquake resistance of the overall structure is improved; secondly, CFRP cloth is clamped between two slotted steel plates, and because the CFRP cloth has certain toughness and deformability, the two slotted steel plates have small-range deformability in the direction perpendicular to the shear wall, and further compared with a mode of directly rigidly attaching a plurality of slotted steel plates to each other, the middle wall limb of the slotted steel plate has better small-amplitude bending capability, so that the stress deformability and the energy consumption performance of the middle wall limb of the slotted steel plate are improved, and the defect that the wall limbs of the adjacent slotted steel plates interfere with each other, deform and energy consumption capability are blocked and additional bending moment is greatly transferred to a frame beam to cause integral instability due to the fact that the slotted steel plates are directly rigidly attached when the slotting directions are different is avoided; in addition, because CFRP plates are integrally paved on the outer sides of the two slotted steel plates, compared with the mode that rib-shaped pieces are additionally arranged near slots of the steel plates in the prior art, the rigidity, the stability and the ultimate bearing capacity of the traditional slotted steel plate shear wall are obviously improved, the surface flatness of the shear wall is obviously improved, and the slotted steel plate shear wall still can keep better energy consumption capacity due to the existence of CFRP cloth.
Further, a plurality of strip-shaped slits with the same slit directions as the first slit steel plate and the second slit steel plate are cut out from the CFRP cloth, and the fiber extending direction of the CFRP cloth is perpendicular to the slit directions of the strip-shaped slits. The strip-shaped seam is formed by utilizing the tailorable performance of the CFRP cloth, and the person skilled in the art can understand that the fiber on the CFRP cloth has a specific extending direction.
Further, the inner walls of the first frame beam and the second frame beam are respectively connected with two mutually parallel fishplates, the two CFRP plates are positioned between the two fishplates, and the top ends and the bottom ends of the CFRP plates are respectively abutted with the fishplates on the same side.
Since the two CFRP plates are positioned between the two fishplates, the first slotted steel plate, the CFRP cloth and the second slotted steel plate which are positioned between the two CFRP plates are also positioned between the two fishplates, so that the structural members for reinforcement are limited in a designated area through the two fishplates, and stable limiting and mounting of the structural members for reinforcement are realized.
Further, the top end of the CFRP cloth is lower than the bottom end of the fishplate positioned above; the bottom end of the CFRP cloth is higher than the top end of the lower fishplate.
Considering that the CFRP cloth in the application needs to be adhered between the first slotted steel plate and the second slotted steel plate by adopting epoxy resin, the thickness of the epoxy resin coated each time cannot be guaranteed to be equal in the actual operation process, so that the total thickness of the two CFRP plates can be different in different assembly operations; also, since the interval between the two fishplates is fixed, if the epoxy resin is coated too thick, there may be a problem in that the total thickness between the two CFRP plates is too large, and it is inconvenient to fit between the two fishplates. In order to overcome the problems, the CFRP cloth in the scheme is not completely paved between two slotted steel plates, but is arranged through the size and the height of the CFRP cloth, so that gaps are reserved between the top end and the bottom end of the CFRP cloth and the top end and the bottom end of the slotted steel plates respectively, and further, the top end and the bottom end of the first slotted steel plate and the top end and the bottom end of the second slotted steel plate are in a hollow state of unfilled CFRP cloth, and therefore, when the two CFRP plates and a component in the middle of the two CFRP plates are inserted between the two fishplates, the top ends and the bottom ends of the two CFRP plates can be inwards extruded to enable the two CFRP plates to be deformed inwards, so that the mounting and the use of the CFRP cloth are effectively ensured, and the problem of difficult assembly caused by uneven and unstable coating thickness of epoxy resin is overcome.
Further, a plurality of first bolt holes are formed in the fishplate, second bolt holes corresponding to the first bolt holes one by one are formed in the CFRP plate, and third bolt holes corresponding to the second bolt holes one by one are formed in the first slotted steel plate and the second slotted steel plate; the two opposite fishplates are connected through bolts.
After two CFRP plates and a first slotted steel plate, a second slotted steel plate and CFRP cloth between the two CFRP plates are assembled between the fishplates at the upper end and the lower end, the scheme can sequentially pass through the first bolt hole at one side, the second bolt hole at one side, the third bolt hole at the other side, the second bolt hole at the other side and the first bolt hole at the other side through bolts, and nuts are screwed at two ends to realize locking assembly of a reinforcing member, so that sliding of the slotted steel plate under a high-intensity earthquake is reduced, and the mechanical property of the internally filled slotted steel plate is exerted as much as possible. And, slotting steel plate and CFRP board all carry out bolted connection through reserving bolt hole and fishplate, and then realize being connected with frame construction, be favorable to after the shake quick replacement first slotting steel plate and/or second slotting steel plate, reduce the shake and change the degree of difficulty.
Further, the aperture of the second bolt hole is larger than the apertures of the first bolt hole and the third bolt hole.
This scheme is through the mode in increase second bolt hole aperture for when the shear force wall bears horizontal load under the earthquake effect, CFRP board does not directly participate in resisting horizontal load, but is in elasticity stage all the time, just need change first slotting steel sheet and second slotting steel sheet after the earthquake like this can, need not to change the CFRP board of both sides after every earthquake, and then obviously practiced thrift the material and used, make this application more be applicable to in the steel construction building of earthquake multiple region.
Further, gaps between the two lateral side walls of the first slotted steel plate and the second slotted steel plate and the frame structure are smaller than or equal to 5cm; the inner walls of the first frame column and the second frame column are respectively connected with a buffer mechanism, and the buffer mechanisms are in butt joint with the side walls of the first slotted steel plate and the second slotted steel plate.
In the prior art, in order to avoid the formation of tension bands to generate additional bending moment on frame columns at two sides in the slotted steel plate shear wall, a larger distance is generally formed between the slotted steel plate and the frame columns at two sides, but the method is not friendly to the overall strength and stability of the shear wall. The gaps between the first slotted steel plate and the second slotted steel plate and the first frame column and the second frame column on two sides are smaller than or equal to 5cm, and the gaps are obviously smaller than those of the prior art, namely the widths of the first slotted steel plate and the second slotted steel plate are widened; this scheme sets up a plurality of buffer gear in this clearance department to make buffer gear install the inner wall at first frame post and second frame post, make the horizontal both sides lateral wall of first slotting steel plate and second slotting steel plate, respectively with the buffer gear butt of both sides. The arrangement of the scheme can obviously improve the integrity and mechanical stability of the slotted steel plate shear wall, and simultaneously, due to the plurality of buffer mechanisms at the two sides, the moment transmitted to the two sides through the slotted steel plate is consumed through the energy consumption effect of the buffer mechanisms, so that the large additional bending moment to the frame columns at the two sides can be effectively avoided; meanwhile, the buffer mechanisms at two sides can not interfere the capacity of the middle wall limbs of the first slotted steel plate and the second slotted steel plate to generate small-amplitude bending deformation, so that the deformation performance and the energy consumption performance of the first slotted steel plate and the second slotted steel plate can be ensured; in addition, the buffer mechanisms on the two sides are in contact with the first slotted steel plate and the second slotted steel plate, but not in contact with the CFRP plates, so that torque can be guaranteed not to be transmitted to the frame columns on the two sides through the rigid CFRP plates, and redundant bending moment can be guaranteed not to be generated on the frame columns on the two sides on the premise of fully playing the functions of the CFRP plates in the application.
Further, the buffer mechanism comprises a mounting piece, sliding grooves and sleeves, wherein the mounting piece is used for being fixed on the inner wall of the first frame column or the second frame column, the sliding grooves are formed in the two opposite side walls of the mounting piece, the sleeves are sleeved outside the mounting piece and are in sliding fit with the sliding grooves in the two sides of the mounting piece, and a plurality of elastic pieces are connected between the mounting piece and the sleeves.
In the scheme, the mounting piece is fixed on the inner wall of the first frame column or the second frame column, the sleeve is in sliding fit on the mounting piece and is used as a part which is abutted against the first slotted steel plate and the second slotted steel plate, and the energy consumption effect of the buffer mechanism is realized by compressing the inner elastic piece; in addition, due to the action of the elastic pieces on the two sides, the vibration reduction and shock resistance effect of the earthquake-resistant vehicle can be improved, and the earthquake-resistant vehicle is more suitable for the use of multiple earthquake areas.
An assembly method of an assembled CFRP-slotted steel plate shear wall structure, comprising the following steps:
connecting the first frame beam, the first frame column and the second frame beam to obtain a C-shaped semi-finished frame;
coating epoxy resin on the surface of the first slotted steel plate, and adhering CFRP cloth on the first slotted steel plate; coating epoxy resin on the surface of CFRP cloth, adhering a second slotting steel plate on one side of the CFRP cloth, which is away from the first slotting steel plate, and enabling slotting directions of the first slotting steel plate and the second slotting steel plate to be the same, so as to obtain a reinforcing component;
completely covering the CFRP plates on both sides of the reinforcing component;
the CFRP plate and the reinforcement component are jointly installed in the semi-finished frame, and the CFRP plate and the reinforcement component are fixedly connected with the first frame beam and the second frame beam through bolts;
and installing a second frame column to finish assembly.
Further, before obtaining the semi-finished frame of type C: two mutually parallel fishplates are welded on the inner walls of the first frame beam and the second frame beam, and a plurality of buffer mechanisms which are longitudinally arranged are welded on the inner walls of the first frame column and the second frame column; and the distance between the two mutually parallel fishplates is equal to the sum of the thicknesses of the two CFRP plates, the first slotted steel plate, the second slotted steel plate and the CFRP cloth.
Further, the method of co-installing the CFRP panel and the reinforcement assembly into the semi-finished frame includes: the top ends and the bottom ends of the two CFRP plates are extruded inwards, so that the top ends and the bottom ends of the two CFRP plates enter between the two corresponding mutually parallel fishplates; and continuing to push the CFRP plate and the reinforcing assembly inwards to enable the end parts of the first slotted steel plate and the second slotted steel plate to be abutted with the buffer mechanism on the first frame column.
Further, the method for installing the second frame post comprises the following steps: and positioning the second frame column at the notch of the semi-finished frame, enabling a buffer mechanism on the second frame column to be in butt joint with the first slotted steel plate and the second slotted steel plate, and connecting the top end and the bottom end of the second frame column with the first frame beam and the second frame beam respectively.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the assembled CFRP-slotted steel plate shear wall structure and the assembly method thereof, CFRP cloth and CFRP plates are combined for use in the field of slotted steel plate shear walls, the overall shear capacity of the shear wall can be remarkably improved through the CFRP cloth clamped between the two slotted steel plates, and the overall tensile capacity of the shear wall can be remarkably improved through the CFRP plates paved on the outer surfaces of the two sides of the slotted steel plates, so that under the earthquake action, the CFRP cloth and the CFRP plates cooperate with the two slotted steel plates to jointly bear shear loads, the overall rigidity loss of the slotted steel plates is effectively reduced, the overall deformation of the slotted steel plates is restrained, the premature buckling is prevented, and the earthquake resistance of the overall structure is improved.
2. According to the assembled CFRP-slotted steel plate shear wall structure and the assembly method thereof, CFRP cloth is clamped between two slotted steel plates, so that the two slotted steel plates have small-range deformation capability in the direction perpendicular to the shear wall, and further compared with the mode of directly rigidly attaching a plurality of slotted steel plates to each other, the middle wall limb of the slotted steel plate has better small-amplitude bending capability, so that the stress deformation performance and the energy consumption performance of the wall limb are improved, and the defect that the wall limbs of adjacent slotted steel plates interfere with each other, deform and energy consumption capability are blocked, and an additional bending moment is greatly transferred to a frame beam to cause integral instability due to the fact that the slotted steel plates are directly rigidly attached when the slotting directions are different is avoided.
3. Compared with the prior art that rib-shaped pieces are added near the slots of the steel plates, the assembled CFRP-slotted steel plate shear wall structure and the assembly method thereof remarkably improve the rigidity, stability and ultimate bearing capacity of the traditional slotted steel plate shear wall, remarkably improve the surface flatness of the shear wall, and can ensure that the slotted steel plate shear wall still maintains better energy consumption capacity due to the existence of CFRP cloth.
4. According to the assembled CFRP-slotted steel plate shear wall structure and the assembly method thereof, when two CFRP plates and members in the middle of the CFRP plates are inserted between two fishplates, the top ends and the bottom ends of the two CFRP plates can be inwards extruded to enable the two CFRP plates to be inwards deformed, so that the assembly and the use of the assembled CFRP-slotted steel plate shear wall structure are effectively ensured, and the problem of difficult assembly caused by uneven and unstable coating thickness of epoxy resin is solved.
5. According to the assembled CFRP-slotted steel plate shear wall structure and the assembly method thereof, the strip-shaped slots which are the same as the slotting directions of the first slotted steel plate and the second slotted steel plate are cut out on the CFRP cloth, the fiber extending direction on the CFRP cloth is perpendicular to the slotting direction of the strip-shaped slots, the earthquake resistance of the steel plate can be better cooperated, the tensile performance of the steel plate can be fully exerted, and the multi-directional pushing and covering bearing capacity of the shear wall can be improved.
6. According to the assembled CFRP-slotted steel plate shear wall structure and the assembly method thereof, when the shear wall bears horizontal load under the action of an earthquake, the CFRP plates are not directly involved in resisting the horizontal load, but are always in an elastic stage, so that only the first slotted steel plate and the second slotted steel plate are required to be replaced after the earthquake, the CFRP plates on two sides are not required to be replaced after each earthquake, the material use is further obviously saved, and the assembled CFRP-slotted steel plate shear wall structure is more suitable for steel structure buildings in areas with frequent earthquakes.
7. According to the assembled CFRP-slotted steel plate shear wall structure and the assembling method thereof, the integrity and the mechanical stability of the slotted steel plate shear wall can be remarkably improved, meanwhile, the moment transmitted to two sides through the slotted steel plate is consumed through the energy consumption function of the buffer mechanism, and the large additional bending moment on the frame columns at two sides can be effectively avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention. In the drawings:
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is a front view of an embodiment of the present invention;
FIG. 5 is a cross-sectional view of a cushioning mechanism in an embodiment of the present invention;
fig. 6 is an exploded view of a first slit steel plate, a second slit steel plate, and CFRP cloth in an embodiment of the present invention.
In the drawings, the reference numerals and corresponding part names:
1-first frame beam, 2-first frame column, 3-second frame beam, 4-second frame column, 5-first slotted steel plate, 6-second slotted steel plate, 7-CFRP cloth, 8-CFRP plate, 9-fishplate, 10-second bolt hole, 11-buffer mechanism, 111-mounting piece, 112-spout, 113-sleeve, 114-elastic piece, 12-nut, 13-bolt, 14-bar slot.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention. In the description of the present application, it should be understood that the directions or positional relationships indicated by terms such as "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present application.
Example 1
The assembled CFRP-slotted steel plate shear wall structure shown in the figures 1 to 3 comprises a frame structure formed by sequentially enclosing a first frame beam 1, a first frame column 2, a second frame beam 3 and a second frame column 4, and further comprises a first slotted steel plate 5 and a second slotted steel plate 6 which are connected inside the frame structure, wherein the slotting directions of the first slotted steel plate 5 and the second slotted steel plate 6 are the same; a CFRP cloth 7 is clamped between the first slotted steel plate 5 and the second slotted steel plate 6; the CFRP plate 8 is paved on one side surface of the first slotted steel plate 5, which is away from the second slotted steel plate 6, and one side surface of the second slotted steel plate 6, which is away from the first slotted steel plate 5.
Wherein,
the inner walls of the first frame beam 1 and the second frame beam 3 are respectively connected with two mutually parallel fishplates 9, two CFRP plates 8 are positioned between the two fishplates 9, and the top ends and the bottom ends of the CFRP plates 8 are respectively abutted with the fishplates 9 on the same side.
The top end of the CFRP cloth 7 is lower than the bottom end of the fishplate 9 above; the bottom end height of the CFRP cloth 7 is higher than the top end height of the fishplate 9 located below. The fishplate 9 is provided with a plurality of first bolt holes, the CFRP plate 8 is provided with second bolt holes 10 which are in one-to-one correspondence with the first bolt holes, and the first slotted steel plate 5 and the second slotted steel plate 6 are provided with third bolt holes which are in one-to-one correspondence with the second bolt holes 10; the two opposite fishplates 9 are connected through bolts. The aperture of the second bolt hole 10 is larger than the apertures of the first bolt hole and the third bolt hole.
In this embodiment, the size of the CFRP plate is the same as the first slit steel plate and the second slit steel plate, so as to achieve complete laying.
Preferably, as shown in fig. 6, the slits on the first slit steel plate 5 and the second slit steel plate 6 are opened longitudinally, so as to better resist the earthquake action and improve the applicability of the shear wall in the earthquake-prone area.
In a more preferred embodiment, as shown in fig. 6, the CFRP cloth 7 is cut with a plurality of strip-shaped slits 14 having the same slit directions as the first slit steel plate 5 and the second slit steel plate 6, and the fiber extending direction of the CFRP cloth is perpendicular to the slit directions of the strip-shaped slits 14.
In a more preferred embodiment, the width of the slits in the first and second slit steel plates 5, 6 is preferably consistent with the thickness of the corresponding slit steel plates, and both sides of the slits are rounded to prevent stress concentration.
Example 2
On the basis of the embodiment 1, as shown in fig. 1 to 5, gaps between the two lateral side walls of the first slotted steel plate 5 and the second slotted steel plate 6 and the frame structure are smaller than or equal to 5cm; as shown in fig. 4, the inner walls of the first frame column 2 and the second frame column 4 are connected with a buffer mechanism 11, and the buffer mechanism 11 is abutted against the side walls of the first slit steel plate 5 and the second slit steel plate 6.
The buffer mechanism in this embodiment, as shown in fig. 5, includes an installation member 111 for fixing on the inner wall of the first frame column 2 or the second frame column 4, sliding grooves 112 formed on two opposite side walls of the installation member 111, and a sleeve 113 sleeved outside the installation member 111 and slidably engaged with the sliding grooves 112 on two sides, wherein a plurality of elastic members 114 are connected between the installation member 111 and the sleeve 113.
Wherein, the width of sleeve 113 terminal surface is greater than CFRP cloth 7 thickness, is less than or equal to the distance between first slotted steel plate 5 and the second slotted steel plate 6 outer wall surface to guarantee that the sleeve can with first slotted steel plate and second slotted steel plate butt, but can not with two CFRP boards direct contact.
Example 3
An assembly method for assembling the assembled slotted steel shear wall shown in fig. 1 to 5 comprises the following steps:
s1, welding two mutually parallel fishplates 9 on the inner walls of a first frame beam 1 and a second frame beam 3, and welding a plurality of buffer mechanisms 11 uniformly distributed along the longitudinal direction on the inner walls of a first frame column 2 and a second frame column 4; the distance between the two parallel fishplates 9 is equal to the sum of the thicknesses of the two CFRP plates 8, the first slotted steel plate 5, the second slotted steel plate 6 and the CFRP cloth 7;
s2, connecting the first frame beam 1, the first frame column 2 and the second frame beam 3 to obtain a C-shaped semi-finished frame;
s3, coating epoxy resin on the surface of the first slotted steel plate 5, and adhering CFRP cloth 7 on the first slotted steel plate 5; coating epoxy resin on the surface of the CFRP cloth 7, adhering a second slotted steel plate 6 on one side of the CFRP cloth 7, which is away from the first slotted steel plate 5, and enabling the slotting directions of the first slotted steel plate 5 and the second slotted steel plate 6 to be the same, so as to obtain a reinforcing component;
s4, completely covering the CFRP plates 8 on both sides of the reinforcing component;
s5, loading the CFRP plate 8 and the reinforcing component into the semi-finished frame together, specifically: the top end and the bottom end of the two CFRP plates 8 are pressed inwards, so that the top end and the bottom end of the two CFRP plates 8 enter between the two corresponding parallel fishplates 9; continuing to push the CFRP plate 8 and the reinforcing assembly inwards to enable the end parts of the first slotted steel plate 5 and the second slotted steel plate 6 to be abutted with the buffer mechanism 11 on the first frame column 2;
s6, fixedly connecting the CFRP plate 8 and the reinforcing component with the first frame beam 1 and the second frame beam 3 through bolts 13 and nuts 12;
s7, installing a second frame column 4 to finish assembly; specific: the second frame column 4 is positioned at the notch of the semi-finished frame, the buffer mechanism 11 on the second frame column 4 is abutted with the first slotted steel plate 5 and the second slotted steel plate 6, and the top end and the bottom end of the second frame column 4 are respectively connected with the first frame beam 1 and the second frame beam 3.
In a more preferred embodiment, after the reinforcement assembly is obtained, the above steps S4 and S5 can be replaced by the following steps:
s4': loading a CFRP plate into the semi-finished frame, enabling the top end and the bottom end of the CFRP plate to enter between two corresponding parallel fishplates 9 and to be abutted against one fishplate 9, and enabling the CFRP plate not to be abutted against a buffer mechanism 11 on the corresponding side; loading the reinforcement assembly into the semi-finished frame, and pressing the reinforcement assembly towards the loaded CFRP plate;
s5': loading another CFRP plate into the semi-finished frame, and pressing the top and bottom ends of the CFRP plate inwards in the loading process to enable the CFRP plate to enter a gap between the reinforcing component and the fishplate at the other side; the reinforcement assembly and the two CFRP plates are pushed integrally inwards, so that the ends of the first slotted steel plate 5 and the second slotted steel plate 6 are abutted against the buffer mechanism 11 on the first frame column 2.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, the term "coupled" as used herein may be directly coupled or indirectly coupled via other components, unless otherwise indicated.
Claims (7)
1. The assembled CFRP-slotted steel plate shear wall structure comprises a frame structure formed by sequentially enclosing a first frame beam (1), a first frame column (2), a second frame beam (3) and a second frame column (4), and is characterized by further comprising a first slotted steel plate (5) and a second slotted steel plate (6) which are connected inside the frame structure, wherein the slotting directions of the first slotted steel plate (5) and the second slotted steel plate (6) are the same; a CFRP cloth (7) is clamped between the first slotted steel plate (5) and the second slotted steel plate (6); a CFRP plate (8) is paved on one side surface of the first slotted steel plate (5) which is away from the second slotted steel plate (6) and one side surface of the second slotted steel plate (6) which is away from the first slotted steel plate (5);
cutting out a plurality of strip-shaped slits on the CFRP cloth (7) in the same slit directions as the first slit steel plate (5) and the second slit steel plate (6), wherein the fiber extending direction on the CFRP cloth is perpendicular to the slit directions of the strip-shaped slits;
the inner walls of the first frame beam (1) and the second frame beam (3) are connected with two mutually parallel fishplates (9), two CFRP plates (8) are positioned between the two fishplates (9), and the top ends and the bottom ends of the CFRP plates (8) are abutted with the fishplates (9) on the same side;
the top end of the CFRP cloth (7) is lower than the bottom end of the fishplate (9) positioned above; the bottom end of the CFRP cloth (7) is higher than the top end of the fishplate (9) positioned below.
2. The assembled CFRP-slotted steel plate shear wall structure according to claim 1, wherein a plurality of first bolt holes are formed in the fishplate (9), second bolt holes (10) which are in one-to-one correspondence with the first bolt holes are formed in the CFRP plate (8), and third bolt holes which are in one-to-one correspondence with the second bolt holes (10) are formed in the first slotted steel plate (5) and the second slotted steel plate (6); the two opposite fishplates (9) are connected through bolts.
3. The fabricated CFRP-slotted steel plate shear wall structure of claim 2 wherein the second bolt hole (10) has a larger aperture than the first and third bolt holes.
4. The fabricated CFRP-slotted steel plate shear wall structure of claim 1, wherein the gaps between the two lateral side walls of the first slotted steel plate (5) and the second slotted steel plate (6) and the frame structure are less than or equal to 5cm; the inner walls of the first frame column (2) and the second frame column (4) are respectively connected with a buffer mechanism (11), and the buffer mechanisms (11) are abutted to the side walls of the first slotted steel plate (5) and the second slotted steel plate (6).
5. The fabricated CFRP-slotted steel plate shear wall structure of claim 4 wherein the buffer mechanism (11) comprises a mounting piece (111) fixed on the inner wall of the first frame column (2) or the second frame column (4), sliding grooves (112) formed on two opposite side walls of the mounting piece (111), and a sleeve (113) sleeved outside the mounting piece (111) and in sliding fit with the sliding grooves (112) on two sides, wherein a plurality of elastic pieces (114) are connected between the mounting piece (111) and the sleeve (113).
6. An assembling method based on the assembled CFRP-slotted steel shear wall structure according to any one of claims 1 to 5, which is characterized by comprising the following steps:
connecting the first frame beam (1), the first frame column (2) and the second frame beam (3) to obtain a C-shaped semi-finished frame;
coating epoxy resin on the surface of the first slotted steel plate (5), and adhering CFRP cloth (7) on the first slotted steel plate (5); coating epoxy resin on the surface of CFRP cloth (7), adhering a second slotted steel plate (6) on one side of the CFRP cloth (7) away from the first slotted steel plate (5), and enabling the slotting directions of the first slotted steel plate (5) and the second slotted steel plate (6) to be the same, so as to obtain a reinforcing component;
completely covering the CFRP plates (8) on both sides of the reinforcement assembly;
the CFRP plate (8) and the reinforcement component are jointly arranged in the semi-finished frame, and the CFRP plate (8) and the reinforcement component are fixedly connected with the first frame beam (1) and the second frame beam (3) through bolts;
and installing a second frame column (4) to finish the assembly.
7. The assembly method according to claim 6, characterized in that, before obtaining the semi-finished frame of C-type: two parallel fishplates (9) are welded on the inner walls of the first frame beam (1) and the second frame beam (3), and a plurality of buffer mechanisms (11) which are longitudinally arranged are welded on the inner walls of the first frame column (2) and the second frame column (4); the distance between two mutually parallel fishplates (9) is equal to the sum of the thicknesses of the two CFRP plates (8), the first slotted steel plate (5), the second slotted steel plate (6) and the CFRP cloth (7);
the method for jointly encasing a CFRP plate (8) and a reinforcement assembly in the semi-finished frame comprises: the top end and the bottom end of the two CFRP plates (8) are pressed inwards, so that the top end and the bottom end of the two CFRP plates (8) enter between the two corresponding mutually parallel fishplates (9); continuously pushing the CFRP plate (8) and the reinforcing component inwards to enable the end parts of the first slotted steel plate (5) and the second slotted steel plate (6) to be abutted with a buffer mechanism (11) on the first frame column (2);
the method of installing the second frame column (4) comprises: positioning the second frame column (4) at a notch of the semi-finished frame, enabling a buffer mechanism (11) on the second frame column (4) to be in butt joint with the first slotted steel plate (5) and the second slotted steel plate (6), and connecting the top end and the bottom end of the second frame column (4) with the first frame beam (1) and the second frame beam (3) respectively.
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| CN202311768849.9A CN117432101B (en) | 2023-12-21 | 2023-12-21 | Assembled CFRP-slotted steel plate shear wall structure and assembling method thereof |
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| CN202311768849.9A CN117432101B (en) | 2023-12-21 | 2023-12-21 | Assembled CFRP-slotted steel plate shear wall structure and assembling method thereof |
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| CN117432101A (en) | 2024-01-23 |
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