Prefabricated and assembled large-board shear wall structure with concealed bracings

Abstract

A prefabricated and assembled large-board shear wall structure with concealed bracings comprises upper large prefabricated reinforced concrete boards with concealed bracings, lower large prefabricated reinforced concrete boards with concealed bracings and cast-in-place concrete. Each large prefabricated reinforced concrete board with concealed bracings comprises a prefabricated wall board, four corner gaps, preserved grooves, distributed steel bars, lattice steel bars, longitudinal bars and stirrups of embedded columns, square steel pipes, X-shaped diagonal steel bracings and annular reinforcing bars. The embedded column square steel pipes and the X-shaped diagonal steel bracings of the large prefabricated reinforced concrete boards with concealed bracings are welded through L-shape angle steel to form a steel framework and are jointly stressed with a steel bar net and the concrete. Reinforcing ribs are arranged at the tops of the square steel pipes and extend into the upper-layer square steel pipes for certain distances. The four corner gaps are provided with gap steel bars, and the annular reinforcing bars are arranged in the middle groove-shaped gap areas. The four corner gaps are indirectly in lap joint with the gap steel bars through connecting steel bars, and the annular reinforcing bars are inserted into the middle groove-shaped gap areas through connecting steel bars in an indirect lap joint mode. The prefabricated and assembled large-board shear wall structure with the concealed bracings is more reliable in vertical connection and better in integrality and has multiple obvious anti-seismic defense lines, and the bearing capacity is remarkably improved.

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 prefabricated assembly type large-slab shear wall structure with hidden support and a method for constructing upper and lower connection nodes. Background technique [0002] The prefabricated structure is assembled and connected by prefabricated concrete components or parts, which meets the needs of the development of construction industrialization and housing industrialization. It has many advantages such as fast construction speed, high manufacturing precision, environmental protection and sustainability. The application is very extensive; domestic research is currently mainly concentrated in the field of prefabricated frame structures, and research on the seismic performance of prefabricated assembly shear wall structures is rare; the key to ...

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Problems solved by technology

[0002] The prefabricated structure is assembled and connected by prefabricated concrete components or parts, which meets the needs of the development of construction industrialization and housing industrialization. It has many advantages such as fast construction speed, high manufacturing precision, environmental protection and sustainability. The application is very extensive; domestic research is currently mainly concentrated in the field of prefabricated frame structures, and research on the seismic performance of prefabricated assembly shear wall structures is rare; the key to ensuring the seismic performance of prefabricated assembly structures is mainly reflected in structural measures such as node connections The design and other aspects of the traditional prefabricated shear wall structure mainly include: steel sleeve connection (including shear key), local unbonded steel sleeve connection, angle steel weld connection, steel bar and steel pipe bolt connection and Prestressed connection, etc.; existing experimental studies have shown that the seismic performance of prefabricated walls under these connection methods is relatively good, but they are still indirect connections after all. Compared with the overall cast-in-place shear wall structure, the joint connection is still weak and other shortcomings

[0003] As the height of the traditional prefabricated shear wall increases, its thickness 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 earthquake The ductility under the action 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

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