CN108104308B - Repairable multistage energy consumption dry-type mixed assembled concrete shear wall - Google Patents

Repairable multistage energy consumption dry-type mixed assembled concrete shear wall Download PDF

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Publication number
CN108104308B
CN108104308B CN201711347315.3A CN201711347315A CN108104308B CN 108104308 B CN108104308 B CN 108104308B CN 201711347315 A CN201711347315 A CN 201711347315A CN 108104308 B CN108104308 B CN 108104308B
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shear wall
energy consumption
steel
concrete shear
steel pipe
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CN108104308A (en
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朱张峰
臧旭磊
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Nanjing Tech University
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Nanjing Tech University
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/56Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02Buildings, 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
    • E04H9/021Bearing, supporting or connecting constructions specially adapted for such buildings

Abstract

The invention discloses a repairable multistage energy consumption dry type mixed assembled concrete shear wall, wherein high-strength steel pipes are buried in edge members of the precast concrete shear wall, and the steel pipes are filled with high-strength concrete; the edge components of the precast concrete shear wall are connected through multistage energy consumption pieces, the multistage energy consumption pieces are connected with the embedded high-strength steel pipes through end plate bolts, and the middle parts of the multistage energy consumption pieces are connected through post-tensioned unbonded prestressed screw-thread steel bars; the multistage energy consumption piece is made of a top plate, a bottom plate, a steel pipe concrete rod body with constraint steel pipes, a connecting plate and energy consumption steel plates with diagonal stiffening ribs, wherein only the energy consumption steel plates are connected with the connecting plate through high-strength bolts, and other rod pieces are welded. The invention establishes the repairable multistage energy-consumption hybrid connection assembled shear wall while realizing dry connection without cast-in-place concrete or grouting construction, has clear working mechanism, excellent anti-seismic performance and obvious technical and economic benefits, and is particularly suitable for popularization and application in earthquake fortification areas.

Description

Repairable multistage energy consumption dry-type mixed assembled concrete shear wall
Technical Field
The invention relates to a repairable multistage energy consumption dry-type mixed assembled concrete shear wall, and belongs to the technical field of assembled concrete shear wall structures of constructional engineering.
Background
The industrial upgrading and reconstruction are needed in the building industry in China, an assembled concrete structure serving as one of important realization ways of building industrialization becomes a research and development hot spot, and an assembled concrete shear wall structure suitable for residential buildings with wide application markets becomes an important research object. Because the earthquake-proof fortification requirements in China are strict, the shear wall structure is generally higher, the prior 'equivalent cast-in-place' fabricated concrete shear wall usually requires edge member concrete to be cast in place, and meanwhile, the vertical steel bar connection of the shear wall is generally in sleeve grouting connection or slurry anchor connection, so that a large amount of concrete pouring, grouting and other wet operations exist on site, the advantages of the precast concrete technology cannot be fully exerted, and the real development of the fabricated concrete shear wall structure is severely restricted.
The middle part of the wall body of the shear wall is connected in a crimping way through post-tensioned unbonded prestressed screw steel bars, and the edge components are connected through multi-stage energy dissipation pieces, so that dry mixed connection is realized, and on-site wet operation is thoroughly avoided; the shear wall edge member realizes high bearing capacity of the wall body by embedding the high-strength steel pipe and pouring high-strength concrete, thereby effectively reducing or avoiding member damage and reducing post-earthquake repair difficulty; the multistage energy dissipation piece utilizes a secondary yield mechanism of the thin steel plate and the steel pipe concrete filled rod body to realize good anti-seismic energy dissipation capacity, and the high bearing capacity of the steel pipe concrete rod body realizes reliable connection of shear wall edge members; the unbonded prestressed twisted steel can be subjected to tensioning after earthquake, or the multistage energy consumption piece can be replaced, so that the efficient post-earthquake repairability is realized, the service life of the structure is prolonged, and the maintenance cost is reduced. The invention forms a technology which can be well applied to areas with earthquake-proof fortification requirements and has obvious technical and economic benefits, and breaks through the existing technical system of the assembled concrete shear wall structure.
Disclosure of Invention
The invention aims to provide a repairable multistage energy consumption dry type mixed assembled concrete shear wall, which breaks through the technical system of the traditional assembled concrete shear wall structure and thoroughly solves the inherent problems of the traditional cast-in-situ assembled concrete shear wall technology.
The invention adopts the technical scheme that: a repairable multistage energy consumption dry type mixed assembled concrete shear wall comprises an upper precast concrete shear wall, a lower precast concrete shear wall, a pre-buried high-strength steel pipe, a middle pre-buried steel pipe, a pre-stressed twisted steel, an end plate and a multistage energy consumption piece;
the upper precast concrete shear wall and the lower precast concrete shear wall are internally provided with embedded high-strength steel pipes respectively, the embedded high-strength steel pipes are filled with high-strength concrete, the upper precast concrete shear wall and the lower precast concrete shear wall are internally provided with through middle embedded steel pipes, the middle embedded steel pipes are internally penetrated with prestressed screw bars, and the upper precast concrete shear wall and the lower precast concrete shear wall are in compression connection through a unbonded post-tensioning process;
the embedded high-strength steel pipe extends out of the concrete surface of the edge member for a certain distance, an end plate is welded, and the upper precast concrete shear wall and the lower precast concrete shear wall are connected with the multistage energy dissipation member through the end plate and the multistage energy dissipation member through bolts at the edge member;
the multistage energy dissipation piece comprises a top plate, a bottom plate and steel pipe concrete rods, wherein the two steel pipe concrete rods are welded between the top plate and the bottom plate, constraint steel pipes which constrain the steel pipe concrete rods and freely slide are sleeved outside the steel pipe concrete rods, energy dissipation steel plates are arranged between the two steel pipe concrete rods, and the energy dissipation steel plates are connected with the top plate, the bottom plate and the steel pipe concrete rods through connecting steel plates arranged at corners through bolts.
Preferably, the energy-consumption steel plate is provided with cross stiffening ribs on two sides along diagonal lines, so that the buckling performance of the energy-consumption steel plate is improved.
Preferably, two sides of the energy consumption steel plate are vertically beveled to provide space for the installation of the constraint steel pipe.
The beneficial effects are that: (1) According to the precast concrete shear wall edge member, the high-strength steel pipe is embedded, and the steel pipe is filled with high-strength concrete, so that the stress performance of the shear wall key stress part-edge member is effectively improved; (2) The energy-consumption steel plate of the multi-stage energy-consumption piece is connected with the energy-consumption piece main body through the four-corner bolts, so that the stress of the energy-consumption steel plate is reasonably simplified, the anti-instability capability of the steel plate is further improved through the stiffening ribs arranged along the opposite angles of the steel plate, and the full play of the energy-consumption capability of the steel plate is ensured; (3) The steel pipe concrete rod body of the multistage energy dissipation piece provides higher bearing capacity, ensures reliable connection of edge members, freely constrains the steel pipe by the outer sleeve, improves the instability resistance of the steel pipe, and further ensures split exertion of the bearing capacity and the energy dissipation capacity of the steel pipe concrete rod body; (4) The unbonded prestressed twisted steel can be subjected to tensioning again after the earthquake, and the multi-stage energy consumption piece can be replaced after the earthquake, so that repairability is realized, and obvious technical and economic benefits are achieved.
Drawings
FIG. 1 is an overall schematic of a shear wall connection of the present invention;
fig. 2 is a schematic diagram of a multi-stage energy consuming device of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description.
As shown in fig. 1 and 2: a repairable multistage energy consumption dry type mixed assembled concrete shear wall comprises an upper precast concrete shear wall 1, a lower precast concrete shear wall 2, a pre-buried high-strength steel pipe 3, a middle pre-buried steel pipe 4, a pre-stress twisted steel 5, an end plate 6 and multistage energy consumption pieces;
the inside of the upper precast concrete shear wall 1 and the inside of the lower precast concrete shear wall 2 are respectively provided with an embedded high-strength steel pipe 3, the embedded high-strength steel pipes 3 are filled with high-strength concrete, the inside of the upper precast concrete shear wall 1 and the inside of the lower precast concrete shear wall 2 are also provided with a through middle embedded steel pipe 4, the middle embedded steel pipe 4 is internally penetrated with a prestressed screw thread steel bar 5, and the upper precast concrete shear wall 1 and the lower precast concrete shear wall 2 are in pressure connection through a unbonded post-tensioning process;
the embedded high-strength steel pipe 3 extends out of the concrete surface of the edge member for a certain distance, an end plate 6 is welded, and the upper precast concrete shear wall 1 and the lower precast concrete shear wall 2 are connected with the multistage energy dissipation member 7 at the edge member through the end plate 6 by bolts;
the multistage energy dissipation device 7 comprises a top plate 8, a bottom plate 9 and steel pipe concrete rods 10, wherein the two steel pipe concrete rods 10 are welded between the top plate 8 and the bottom plate 9, constraint steel 11 pipes which are used for constraining the steel pipe concrete rods and can slide freely are sleeved outside the steel pipe concrete rods 10, energy dissipation steel plates 12 are arranged between the two steel pipe concrete rods 10, and the energy dissipation steel plates 12 are connected with the top plate 8, the bottom plate 9 and the steel pipe concrete rods 10 through connecting steel plates 13 arranged at corners through bolts. The energy consumption steel plate 12 is provided with the cross stiffening ribs 14 along the diagonal on both sides, the buckling performance of the energy consumption steel plate 12 is improved, grooves 15 are formed on both sides of the energy consumption steel plate 12, and space is provided for the installation of the constraint steel pipe 11.
When the repairable multistage energy consumption dry type mixed assembled concrete shear wall is installed on site, firstly, installing prestressed screw bars on the top of the completed precast concrete shear wall; hoisting the prefabricated shear wall to be installed in place, and enabling the prestressed twisted steel to penetrate through the embedded steel pipe in the middle of the shear wall; tensioning the prestressed twisted steel to enable the stress to reach the design requirement; and finally, installing multi-stage energy consumption pieces to finish the connection operation of the precast concrete shear wall.
The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the spirit and scope of the invention.

Claims (1)

1. A repairable multistage energy consumption dry-type hybrid assembled concrete shear wall is characterized in that: the device comprises an upper precast concrete shear wall, a lower precast concrete shear wall, a pre-embedded high-strength steel pipe, a middle pre-embedded steel pipe, a pre-stressed twisted steel, an end plate and a multi-stage energy consumption piece;
the upper precast concrete shear wall and the lower precast concrete shear wall are internally provided with embedded high-strength steel pipes respectively, the embedded high-strength steel pipes are filled with high-strength concrete, the upper precast concrete shear wall and the lower precast concrete shear wall are internally provided with through middle embedded steel pipes, the middle embedded steel pipes are internally penetrated with prestressed screw bars, and the upper precast concrete shear wall and the lower precast concrete shear wall are in compression connection through a unbonded post-tensioning process;
the embedded high-strength steel pipe extends out of the concrete surface of the edge member for a certain distance, an end plate is welded, and the upper precast concrete shear wall and the lower precast concrete shear wall are connected with the multistage energy dissipation member through the end plate and the multistage energy dissipation member through bolts at the edge member;
the multistage energy consumption piece comprises a top plate, a bottom plate and steel pipe concrete rods, wherein the two steel pipe concrete rods are welded between the top plate and the bottom plate, constraint steel pipes which constrain the steel pipe concrete rods and freely slide are sleeved outside the steel pipe concrete rods, energy consumption steel plates are arranged between the two steel pipe concrete rods, and the energy consumption steel plates are connected with the top plate, the bottom plate and the steel pipe concrete rods through connecting steel plates arranged at corners through bolts;
the two sides of the energy-consumption steel plate are provided with cross stiffening ribs along diagonal lines;
and grooves are formed in the two sides of the energy consumption steel plate vertically.
CN201711347315.3A 2017-12-15 2017-12-15 Repairable multistage energy consumption dry-type mixed assembled concrete shear wall Active CN108104308B (en)

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CN108442575B (en) * 2018-06-04 2023-06-16 福建工程学院 Prefabricated lattice combined shear wall assembly monomer and connecting method thereof
CN110593417A (en) * 2018-06-12 2019-12-20 迈瑞司(北京)抗震住宅技术有限公司 Assembled shear wall
CN110714552A (en) * 2018-07-13 2020-01-21 天津大学 Steel construction assembled shear force wall connection structure
CN111321821B (en) * 2020-02-28 2021-06-22 南京工程学院 Adopt prefabricated shear force wall steel bar connection structure tied in a bundle of full assembled level seam
CN112832385A (en) * 2020-12-25 2021-05-25 黑龙江中晟绿色建筑产业发展有限公司 Round steel tube concrete longitudinal connecting device of assembled shear wall
CN114277943A (en) * 2020-12-25 2022-04-05 珠海动和工程咨询有限公司 Assembled shear wall structure
CN112709349A (en) * 2020-12-25 2021-04-27 黑龙江中晟绿色建筑产业发展有限公司 Assembled shear force wall of longitudinal tie bar in both sides of circular steel tube concrete

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