Bolted connection technique for prefabricated large plate shear wall provided with concealed bracing and construction method

Abstract

The invention discloses a bolted connection technique for a prefabricated large plate shear wall provided with a concealed bracing. The shear wall comprises an upper prefabricated concrete large plate provided with concealed bracing bars, a lower prefabricated concrete large plate provided with concealed bracing bars and cast-in-place concrete. Each prefabricated concrete large plate provided with concealed bracing bars comprises a preserved rabbet, two-corner notches, a protruding notch, a steel wire gauze sheet, distributing bars, embedded column longitudinal bars and stirrups, a square steel tube, an X-shaped steel inclined strut, an inner connecting steel plate and an outer connecting steel plate, wherein the vertical distribution bars are arranged on the two-corner notch at the lower end, the steel wire gauze sheet, the outer connecting steel plate, the inner connecting steel plate provided with tapping threaded holes, and the vertical distribution bars are arranged in the area of the protruding notch, the two-corner notches are indirectly connected in a lapping mode through the upper layer and lower layer of vertical bars, the middle protruding notch is inserted into the preserved rabbet in the top end of the lower layer of the shear wall through the upper layer of the shear wall, and then the inner connecting steel plate is connected with the outer connecting steep plate through a high-strength bolt by taking the inner connecting steel plate as a nut. Vertical connection integrity is high, construction is easier and more convenient, bearing capacity is greatly improved, and a remarkable strong node and weak component effect can be generated by the structure.

Description

technical field [0001] The invention belongs to the field of prefabricated building structures, and relates to prefabricated building structures, mainly to a prefabricated large-slab shear wall structure system, and in particular to a bolt connection node technology and construction method of a prefabricated large-slab shear wall with hidden support. Background technique [0002] At present, the prefabricated concrete structure mainly adopts prefabricated or semi-prefabricated beams and columns, floor slabs and wall slabs, which are assembled and poured part of the concrete through on-site construction to form the main force-bearing structure. This structural system has the characteristics of modular production and mechanized construction, with high construction quality and fast construction speed, which can effectively save resources, protect the environment, and help promote the sustainable development of society. At present, domestic research mainly focuses on the field o...

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Problems solved by technology

At present, domestic research mainly focuses on the field of prefabricated frame structures, and research on the seismic performance of prefabricated assembled shear wall structures is relatively rare; the key to ensuring the seismic performance of prefabricated assembled shear wall structures is mainly reflected in the design of structural measures for joint connections. The connection methods of traditional prefabricated shear wall structures mainly include: high-strength bolt connection between steel bar and steel plate, steel sleeve connection (including shear key), angle steel weld connection, local unbonded steel sleeve connection, steel bar and steel pipe Bolt connection and prestressed connection, etc.; existing experimental studies have shown that the seismic performance of prefabricated shear walls under these connection methods is relatively good, but it is still an indirect connection after all. Compared with the overall cast-in-place shear wall structure, it still performs well. Disadvantages such as weak outbound node connection

[0003] As the height of the structure increases, the thickness of the traditional prefabricated shear wall will also increase, resulting in an increase in the self-weight of the prefabricated shear wall, which is not conducive to transportation and hoisting, and has a negative effect on improving the bearing capacity of the structure and seismic action. The lower ductility is also relatively unfavorable; moreover, the traditional prefabricated shear wall structure does not have hidden columns and side columns, and the anti-seismic defense line is single

[0004] In the bolt connection of the upper and lower wall pieces of the traditional prefabricated large-slab shear wall, ordinary high-strength bolts are generally used to connect the steel plate connectors of the upper and lower shear walls with screws and nuts. The number of connectors is large, and the construction method is relatively cumbersome. Not conducive to large-scale promotion and application

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