CN210685070U - Replaceable built-in profile steel inclined strut assembly type prestress energy dissipation shear wall - Google Patents

Replaceable built-in profile steel inclined strut assembly type prestress energy dissipation shear wall Download PDF

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Publication number
CN210685070U
CN210685070U CN201921366804.8U CN201921366804U CN210685070U CN 210685070 U CN210685070 U CN 210685070U CN 201921366804 U CN201921366804 U CN 201921366804U CN 210685070 U CN210685070 U CN 210685070U
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shear
steel
energy
prefabricated
embedded
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CN201921366804.8U
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谭平
米鹏
张亚飞
陈洋洋
龙耀球
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Guangzhou University
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Guangzhou University
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Abstract

The utility model discloses a removable built-in shaped steel bracing assembled prestressing force power consumption shear wall, including shear force wall body, prestressing tendons, prefabricated hidden post, consumer, go up restraint roof beam and restraint roof beam down, the top of shear force wall body sets up restraint roof beam, and the bottom of shear force wall body sets up restraint roof beam down, and prestressing tendons has one or many, and every prestressing tendons runs through in last restraint roof beam, between shear force wall body and the restraint roof beam down, and one side or both sides of shear force wall body are equipped with prefabricated hidden post, are connected through the consumer between prefabricated hidden post and the shear force wall body. In the assembled prestress energy dissipation shear wall, the horizontal connection between the prefabricated embedded columns and the shear wall body is realized by utilizing the mild steel energy dissipater, the shear wall body is prevented from being damaged as a yield failure element, and meanwhile, the structural stability of the shear wall body can be effectively improved by arranging the prestress ribs, so that the shear wall body has larger bearing capacity. The use of the prestress technology enables the shear wall body to have good self-resetting capability.

Description

Replaceable built-in profile steel inclined strut assembly type prestress energy dissipation shear wall
Technical Field
The utility model relates to an assembled concrete building field among the civil engineering, in particular to removable built-in shaped steel bracing assembled prestressing force power consumption shear force wall.
Background
The fabricated building has the advantages of resource saving, environmental protection, construction period saving and the like, wherein the fabricated shear wall structure is a widely used structural form due to the characteristics of high bearing capacity, good earthquake resistance and the like. The common precast concrete shear wall has large bearing capacity but insufficient ductility and energy consumption capacity, and particularly under the condition of large deformation, the wall body is easy to have more diagonal cracks in the diagonal direction, so that the structural safety is endangered. When the structural member needs to bear a large acting force, the common concrete wall needs a large section to provide corresponding resistance, which is not favorable for space utilization and economic index control. But in fact, the existing common shear wall has a weakness, namely insufficient energy consumption capacity, seismic energy can be well dissipated only through nonlinear deformation of components, residual deformation is large after earthquake, and the shear wall cannot be reset automatically; the prefabricated prestressed wall body which is not directly connected with the upper and lower restraint beams swings under the action of an earthquake, and relatively large relative displacement can occur between the wall body and the upper and lower restraint beams, so that the four corners of the wall body bear large pressure, the shear wall is damaged due to excessive displacement and deformation, the replacement and repair of the damaged shear wall are very difficult, and the maintenance cost is quite high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's is not enough, provides a removable built-in shaped steel bracing assembled prestressing force power consumption shear force wall, and the shear force wall of this structure has great bearing capacity and better shock resistance power consumption ability, possesses better easily realizes changing and restoreing simultaneously from the ability of restoring to the throne, can realize the purpose of the normal service function of quick recovery building.
The technical scheme of the utility model is that: the replaceable built-in type steel inclined strut assembly type prestress energy dissipation shear wall comprises a shear wall body, prestress ribs, prefabricated hidden columns, energy dissipaters, an upper constraint beam and a lower constraint beam, wherein the upper constraint beam is arranged at the top of the shear wall body, the lower constraint beam is arranged at the bottom of the shear wall body, one or more prestress ribs are arranged, each prestress rib penetrates through the upper constraint beam, the shear wall body and the lower constraint beam, the prefabricated hidden columns are arranged on one side or two sides of the shear wall body, and the prefabricated hidden columns are connected with the shear wall body through the energy dissipaters.
And the four corners of the shear wall body are respectively provided with a damage-prevention steel plate embedded in the shear wall body. Because the shear wall body is not directly connected with the upper constraint beam and the lower constraint beam, the shear wall body is easy to rotate in an earthquake, and therefore the damage-preventing steel plates are pre-buried at four corners of the shear wall body, and damage caused by large local stress can be effectively prevented.
The loss prevention steel plate is L-shaped, and the surface of the loss prevention steel plate is flush with the surface of the shear wall body. The damage-proof steel plate is vertically arranged along a cross-section corner, and the rear side of the damage-proof steel plate is provided with shear-resistant studs and is anchored in concrete forming the shear wall body. The length of the damage-proof steel plate along the height direction of the shear wall body is 2-3 times of the width of the section of the damage-proof steel plate, and the length of the damage-proof steel plate along the length direction of the shear wall body is not less than 1/6 of the length of the shear wall body. The damage-proof steel plate can be directly connected with the pre-buried inclined strut to form a reliable stress path, and local damage to the concrete of the shear wall body is reduced.
Two inclined struts are arranged in the shear wall body and distributed in a cross mode along the diagonal line of the shear wall body to form an X shape. Two ends of each inclined strut are just positioned at the inner sides of the two anti-damage steel plates at the opposite corners. The angle steel is made of angle steel and arranged at the diagonal position of a steel bar framework of the shear wall body, the angle steel is not connected with the prestressed steel bars, the angle steel is not connected with the upper constraint beam and the lower constraint beam, the height of the section of the angle steel is smaller than (h-2c-d)/2, wherein h is the thickness of the shear wall body, c is the thickness of the protective layer, and d is the outer diameter of a reserved pipeline of the prestressed steel bars. Connecting steel plates are embedded in the positions with the heights of 1/6H and 5/6H (H is the height of the shear wall body) on the two sides of the shear wall body respectively, the width of each connecting steel plate is B, the length of each connecting steel plate is L, and the surfaces of the connecting steel plates are flush with the surface of the shear wall body.
When the number of the prestressed tendons is multiple, the prestressed tendons are arranged in parallel along the vertical direction of the shear wall body, and the upper end and the lower end of each prestressed tendon respectively extend out of the upper restraint beam and the lower restraint beam. And a reserved pipeline for mounting prestressed tendons is arranged in the middle of the shear wall body, so that prestress is applied after the shear wall body is mounted in place.
Connecting steel plates are embedded in the two sides of the energy dissipater, the side face of the shear wall body and the side face of the prefabricated embedded column, and the two sides of the energy dissipater are respectively connected with the connecting steel plates; the surface of the connecting steel plate is flush with the surface of the shear wall body or the surface of the prefabricated embedded column. The width of the connecting steel plate is B, the length of the connecting steel plate is L, and the surface of the connecting steel plate is flush with the surface of the prefabricated embedded column or the surface of the shear wall body. When two energy dissipaters are arranged between the shear wall body and the prefabricated embedded columns, the central height positions of the two groups of connecting steel plates with different heights are 1/6H and 5/6H respectively, and H is the height of the shear wall body.
The energy dissipater is a mild steel energy dissipater with small yield displacement and comprises end plates, energy dissipation steel plates and stiffening ribs, wherein the end plates are arranged on two sides of each energy dissipation steel plate respectively, the energy dissipation steel plates are arranged vertically to the end plates, and the stiffening ribs are arranged on two sides of each energy dissipation steel plate respectively; the end plates positioned on the two sides are respectively connected with the shear wall body and the prefabricated embedded columns.
In the energy dissipater, stiffening ribs on the same surface are distributed in a shape like a Chinese character 'yi', a 'wang' or a 'cross'. The energy dissipation steel plate is a mild steel plate. The width of the end plate is smaller than that of the connecting steel plate, and the length of the end plate is smaller than that of the connecting steel plate. The width of the end plate is B, the length of the end plate is L, and the condition that B is smaller than the width B of the connecting steel plate and L is smaller than the length L of the connecting steel plate is met to adapt to construction errors; during actual construction, the actual size of the energy-consuming steel plate mainly depends on the requirement of energy-consuming capacity and the size of a space required to be reserved between members, and two ends of the energy-consuming steel plate are welded with the end plates; stiffening ribs are welded on two sides of the energy consumption steel plate, and can be arranged in different arrangement forms such as a straight shape, a Chinese character 'wang' shape and a cross shape according to the size of the energy consumption steel plate, so that the bearing capacity is improved, and the buckling of the mild steel can be restrained; the end plates of the energy dissipater are respectively welded with the connecting steel plates which are pre-embedded on the prefabricated embedded columns and the shear wall body.
Two energy dissipaters are arranged between one side of the shear wall body and the prefabricated embedded column, the heights of the central positions of the two energy dissipaters are 1/6H and 5/6H respectively, wherein H is the height of the shear wall body; the thickness of the prefabricated embedded columns is equal to that of the shear wall body.
The top of the prefabricated embedded column is separated from the upper restraint beam and a gap is reserved between the top of the prefabricated embedded column and the upper restraint beam, and the bottom of the prefabricated embedded column is hinged with the lower restraint beam.
The bottom of the prefabricated hidden column is embedded with first section steel, and the first section steel is provided with a first through hole; second section steel is pre-embedded on the lower restraint beam, and a second through hole is formed in the second section steel; the first through hole and the second through hole are hinged.
When the replaceable built-in steel inclined strut assembly type prestress energy dissipation shear wall is used, the principle is as follows: when the shear wall body is under the action of vertical force, part of the vertical force is transmitted to the prefabricated embedded column through the energy dissipater, so that the vertical bearing capacity of the shear wall body is improved; when lateral acting force exists, the axial force borne by the prefabricated embedded column can additionally provide overall stable bending moment, so that the lateral resistance is improved; when lateral displacement occurs, the prestress of the shear wall body can pull the shear wall body back to the original position, so that residual deformation is greatly reduced; the prefabricated hidden columns are hinged with the lower constraint beam, so that the prefabricated hidden columns are convenient to disassemble, when the energy dissipater is damaged in the earthquake process, the prefabricated hidden columns can be quickly disassembled, the energy dissipater is replaced, and the prefabricated hidden columns are installed again, so that the quick replacement effect is achieved; compared with the existing energy dissipater between shear walls, the replaceable built-in profile steel inclined strut assembly type prestress energy dissipation shear wall has a better energy dissipation effect, under lateral displacement, four corners of a shear wall body and upper and lower constraint beams are lifted away from each other to form a larger displacement difference, and a hidden column is hinged with the lower constraint beam to keep the rotating distance between a connecting position and a foundation unchanged, so that the relative displacement between two ends of the energy dissipater is larger, and the energy dissipation effect is better.
Compared with the prior art, the utility model, following beneficial effect has:
in the replaceable built-in profile steel inclined strut assembly type prestress energy dissipation shear wall, the horizontal connection between the prefabricated embedded columns and the shear wall body is realized by utilizing the mild steel energy dissipater and serves as a yield failure element to prevent the shear wall body from being damaged, and meanwhile, the prestress ribs are arranged between the shear wall body and the upper and lower restraint beams, so that the structural stability of the shear wall body can be effectively improved, and the shear wall body has larger bearing capacity. The use of the prestress technology enables the shear wall body to have good self-resetting capability; the energy dissipater and the prefabricated embedded column which are damaged after the earthquake can be quickly replaced, and the use function of the building can be quickly recovered.
In the replaceable built-in steel inclined strut assembly type prestress energy dissipation shear wall, the prefabricated embedded columns are connected with the lower restraint beam in a bolt hinged connection mode, the energy dissipation steel plate can be further favorably used for better exerting the effect, and the energy dissipater is convenient to replace and repair.
In this removable built-in shaped steel bracing assembled prestressing force power consumption shear force wall, still be equipped with the loss prevention steel sheet around the shear force wall body, the loss prevention steel sheet can form reliable stress path with pre-buried bracing cooperation, reduces the local damage to shear force wall body concrete.
In the replaceable built-in steel inclined strut assembly type prestress energy dissipation shear wall, the inclined strut is further arranged in the shear wall body, so that the strength of the shear wall body can be effectively enhanced, cracks are prevented from being generated on the shear wall body, the service life of the shear wall body is prolonged, and the replacement frequency and the maintenance cost of the shear wall body are reduced.
In the assembled energy consumption shear wall of this removable built-in shaped steel bracing, because shear wall body, prefabricated hidden column etc. are the prefabricated construction, wet operation is few in the installation, simple to operate and easy operation, can effectively improve the industrialization level of building trade.
Drawings
Fig. 1 is a structural schematic diagram of the replaceable assembled energy dissipation shear wall with built-in profiled bar diagonal braces.
Fig. 2 is a cross-sectional view a-a of fig. 1 with the lower restraint beam removed.
Fig. 3 is a schematic view of a hinge structure between the prefabricated embedded column and the lower restraint beam in fig. 1.
Fig. 4 is a schematic view of the hinge bolt at the hinge in fig. 3.
Fig. 5 is a schematic structural diagram of a shear wall body with a damage-preventing steel plate and a connecting steel plate.
Fig. 6 is a schematic structural view of a prefabricated dark column.
Fig. 7 is a schematic structural diagram of the energy consumer.
In the above figures, the reference numerals are as follows: the prefabricated hidden column comprises a prefabricated hidden column 1, a shear wall body 2, an energy dissipater 3, an end plate 3-1, an energy dissipation steel plate 3-2, stiffening ribs 3-3, a connecting steel plate 4, an upper constraint beam 5, a lower constraint beam 6, an inclined strut 7, section steel 8, a hinge bolt 9, a prestressed tendon 10, a loss prevention steel plate 11 and a reserved pipeline 12.
Detailed Description
The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.
Examples
The assembled energy-consuming shear wall with the replaceable built-in steel diagonal braces comprises a prefabricated embedded column 1, a shear wall body 2, an energy consumer 3, a connecting steel plate 4, an upper restraint beam 5 above the shear wall body, a lower restraint beam 6 below the shear wall body, a prestressed tendon 10, a loss-preventing steel plate 11 and the like, as shown in fig. 1 or fig. 2. The specific structure of each part is as follows:
the prefabricated embedded columns and the shear wall body are as thick as each other, namely the thickness of the prefabricated embedded columns is the same as that of the shear wall body. In this embodiment, two energy dissipators are disposed between a single side of the shear wall body and the prefabricated embedded columns, and therefore, as shown in fig. 5 or fig. 6, two connection steel plates 4 (the connection steel plates are located at two sides of the energy dissipators in pairs, that is, the number of pairs of the connection steel plates is equal to the number of the energy dissipators) are embedded in the connection surface between the shear wall body and the prefabricated embedded columns, wherein the connection steel plates have a width of B and a length of L, and the surfaces of the connection steel plates are flush with the surfaces of the prefabricated embedded columns or the surfaces of. The rear side of the connecting steel plate is welded with a shear-resistant stud anchor and is fixed in concrete, the central height positions of the connecting steel plate are 1/6H and 5/6H respectively, and H is the height of the shear wall body. As shown in fig. 3, the bottom of the prefabricated embedded column and the corresponding position of the lower restraint beam are respectively reserved with section steel 8 with holes, hinged through a hinge bolt 9 (the specific structure is shown in fig. 4), and hinged to enable the mild steel energy dissipater to better exert energy dissipation effect. The top of the prefabricated embedded column is not directly connected with the upper restraint beam, and a proper height is reserved to prevent the embedded column from damaging the shear wall body in the rotating process. The prefabricated hidden column has higher rigidity, and the hooping inside the prefabricated hidden column is full-height-encrypted.
As shown in fig. 1 or fig. 2, two angle steels are adopted in the shear wall body as the inclined struts 7, and are arranged at diagonal positions of the steel reinforcement framework of the shear wall body. The section height of the angle steel is smaller than (h-2c-d)/2, wherein h is the thickness of the shear wall body, c is the thickness of the protective layer, and d is the outer diameter of the reserved pipeline 12 corresponding to the prestressed tendons. Connecting steel plates 4 (corresponding to the prefabricated hidden columns) are respectively embedded at 1/6H and 5/6H (H is the height of the prefabricated shear wall) on two sides of the shear wall, horizontal ribs are appropriately arranged at the embedded parts of the connecting steel plates of the shear wall body, the connecting width B and the length L are connected, the surfaces of the connecting steel plates are flush with the surface of the shear wall body, and shear-resistant studs are welded on the rear sides of the connecting steel plates and anchored in the shear wall body. As shown in fig. 5, a reserved pipe 12 for installing a prestressed tendon 10 is arranged in the middle of the shear wall body and is used for applying prestress after the wall body is installed in place, and the stress level and the diameter of the prestressed tendon of the prestress can be determined according to the specific use condition of the shear wall body; because the shear wall body is not directly connected with the upper constraint beam and the lower constraint beam, the shear wall body is easy to rotate in an earthquake, and the damage-preventing steel plates 11 are pre-embedded at four corners of the shear wall body, so that damage caused by large local stress can be effectively prevented.
In this embodiment, the energy dissipater 3 is a mild steel energy dissipater with a small yield displacement, and dissipates seismic energy by bending and shearing deformation of mild steel. As shown in fig. 7, the energy dissipater includes an end plate 3-1, an energy dissipation steel plate 3-2 and a stiffener 3-3, wherein the end plate has a width B and a length L, and B is smaller than the width B of the connection steel plate and L is smaller than the length L of the connection steel plate, so as to adapt to construction errors. The end plates are connected with the connecting steel plates pre-buried on the prefabricated embedded columns and the connecting steel plates pre-buried on the shear wall body in a welding mode. And selecting the mild steel plate with the corresponding section size according to the size of the damping force and the size of the reserved position. The arrangement of the stiffening ribs can improve the bearing capacity and restrain the buckling of the soft steel, the arrangement mode can be in a straight shape, a shape like a Chinese character 'wang', or a cross shape, the number of the stiffening ribs can be determined according to the actual calculation result, the bearing capacity is improved, and the buckling of the soft steel is restrained.
As shown in figure 3, the column base lower restraint beams of the prefabricated hidden column 1 are all pre-embedded with section steel 8 with bolt holes, the rear sides of the section steel are welded with shear-resistant studs and anchored into concrete, and the two section steel are hinged through a single hinge bolt 9 (the specific structure of which is shown in figure 4). The relative displacement between the mild steel energy dissipater and the shear wall body is larger due to the hinging, the energy dissipation effect is better, and the shear wall body can be rapidly reset under the action of prestress. Meanwhile, the energy dissipater is convenient to replace in a hinged connection mode, and the use function of the integral structure of the shear wall can be quickly recovered. In the hinged bolt, the diameter of the screw can be determined and selected according to the actual stress of the prefabricated embedded column.
As shown in fig. 1 or 5, the damage-proof steel plate is a steel plate vertically arranged along a section corner, and is mainly used for dispersing concentrated stress and deformation of a corner of the shear wall body in a rotating process, so that premature failure of the corner is avoided. The length of the damage-proof steel plate along the height direction of the shear wall body is 2-3 times of the width of the section of the damage-proof steel plate, and the length of the damage-proof steel plate along the length direction of the shear wall body is not less than 1/6 of the length of the shear wall body. The damage-proof steel plate is directly connected with the pre-buried diagonal brace to form a reliable stress path.
As described above, the present invention can be realized well, and the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; all equivalent changes and modifications made according to the present invention are intended to be covered by the scope of the claims of the present invention.

Claims (10)

1. The replaceable built-in type steel inclined strut assembly type prestress energy dissipation shear wall is characterized by comprising a shear wall body, prestress ribs, prefabricated hidden columns, energy dissipaters, an upper constraint beam and a lower constraint beam, wherein the upper constraint beam is arranged at the top of the shear wall body, the lower constraint beam is arranged at the bottom of the shear wall body, one or more prestress ribs are arranged, each prestress rib penetrates through the upper constraint beam, the shear wall body and the lower constraint beam, the prefabricated hidden columns are arranged on one side or two sides of the shear wall body, and the prefabricated hidden columns are connected with the shear wall body through the energy dissipaters.
2. The replaceable built-in steel inclined strut fabricated prestressed energy-dissipating shear wall as claimed in claim 1, wherein the four corners of the shear wall body are respectively provided with an anti-damage steel plate embedded in the shear wall body.
3. The replaceable built-in section steel diagonal bracing fabricated prestressed energy-dissipation shear wall as claimed in claim 2, wherein the damage-proof steel plate is L-shaped, and the surface of the damage-proof steel plate is flush with the surface of the shear wall body.
4. The replaceable built-in steel inclined strut fabricated prestressed energy-dissipation shear wall as claimed in claim 1, wherein two inclined struts are arranged in the shear wall body, and are distributed in a cross manner along a diagonal line of the shear wall body to form an X shape.
5. The replaceable built-in steel inclined strut fabricated prestressed energy-consuming shear wall as claimed in claim 1, wherein when there are a plurality of prestressed tendons, each prestressed tendon is arranged in parallel along a vertical direction of the shear wall body, and upper and lower ends of each prestressed tendon respectively extend out of the upper and lower constraining beams.
6. The replaceable built-in section steel diagonal bracing fabricated prestressed energy-dissipating shear wall as claimed in claim 1, wherein connecting steel plates are pre-embedded in both sides of the energy dissipater, the side surface of the shear wall body and the side surface of the prefabricated embedded column, and both sides of the energy dissipater are respectively connected with the connecting steel plates; the surface of the connecting steel plate is flush with the surface of the shear wall body or the surface of the prefabricated embedded column.
7. The replaceable built-in section steel diagonal bracing fabricated prestressed energy-dissipating shear wall as claimed in claim 1, wherein the energy dissipater is a mild steel energy dissipater, the energy dissipater comprises end plates, energy-dissipating steel plates and stiffening ribs, the end plates are respectively arranged on two sides of each energy-dissipating steel plate, the energy-dissipating steel plates and the end plates are vertically arranged, and the stiffening ribs are respectively arranged on two sides of each energy-dissipating steel plate; the end plates positioned on the two sides are respectively connected with the shear wall body and the prefabricated embedded columns.
8. The replaceable built-in steel inclined strut fabricated prestressed energy-dissipating shear wall as claimed in claim 1, wherein two energy dissipaters are arranged between one side of the shear wall body and the prefabricated embedded column, the heights of the central positions of the two energy dissipaters are 1/6H and 5/6H, respectively, wherein H is the height of the shear wall body; the thickness of the prefabricated embedded columns is equal to that of the shear wall body.
9. The replaceable built-in profiled bar brace assembled prestressed energy-consuming shear wall as claimed in claim 1, wherein the top of the prefabricated embedded column is separated from the upper restraint beam with a gap, and the bottom of the prefabricated embedded column is hinged to the lower restraint beam.
10. The replaceable built-in section steel diagonal bracing fabricated prestressed energy-consuming shear wall as claimed in claim 9, wherein a first section steel is pre-embedded in the bottom of the prefabricated embedded column, and a first through hole is formed in the first section steel; second section steel is pre-embedded on the lower restraint beam, and a second through hole is formed in the second section steel; the first through hole and the second through hole are hinged.
CN201921366804.8U 2019-08-21 2019-08-21 Replaceable built-in profile steel inclined strut assembly type prestress energy dissipation shear wall Active CN210685070U (en)

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Application Number Priority Date Filing Date Title
CN201921366804.8U CN210685070U (en) 2019-08-21 2019-08-21 Replaceable built-in profile steel inclined strut assembly type prestress energy dissipation shear wall

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921366804.8U CN210685070U (en) 2019-08-21 2019-08-21 Replaceable built-in profile steel inclined strut assembly type prestress energy dissipation shear wall

Publications (1)

Publication Number Publication Date
CN210685070U true CN210685070U (en) 2020-06-05

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