Prefabricated steel plate-high-ductility concrete coupling beam

Abstract

The invention provides a prefabricated steel plate-high-ductility concrete coupling beam. The prefabricated coupling beam comprises H-shaped steel, high-ductility concrete, exterior steel plates and T-shaped steel plate connectors. The H-shaped steel is welded to the left sides and the right sides of the exterior steel plates respectively, and the exterior steel plates are welded with one flange plate of the H-shaped steel. Two steel plates of the web portion of each exterior steel plate and the upper and lower steel plates are welded to form a rectangular cavity, and a plurality of T-shaped steel plate connectors are welded on the steel plates on two sides of each web portion in advance. A plurality of casting holes for casting the high-ductility concrete are reserved in the top steel plates of the exterior steel plates. The H-shaped steel on two sides of each exterior steel plate is cast in shear wall limbs on two sides to form the prefabricated coupling beam. The prefabricated coupling beam is easy to construct, high in ductility and good in anti-seismic property.

Description

Technical field [0001] The invention belongs to the field of civil engineering and relates to an energy-consuming coupling beam, in particular to a prefabricated steel plate-high ductility concrete coupling beam. Background technique [0002] Coupling beams are important energy-consuming components of shear wall structures or frame-shear wall structures. Under strong horizontal seismic loads, traditional reinforced concrete coupling beams are prone to brittle shear failure, with poor energy consumption and shear resistance. low. In order to solve the problems of ductility, energy consumption and bearing capacity, domestic and foreign researchers have successively adopted many improvement methods, such as: cross concealed column reinforced coupling beam, diagonal cross diagonally reinforced coupling beam, diamond-shaped reinforced coupling beam, Connecting beams combined with cross-reinforced steel bars and diamond-shaped steel bars and three-layer composite closed constrained st...

AI Technical Summary

Problems solved by technology

Practice has proved that this type of coupling beam can not only increase the shear bearing capacity, but also more effectively improve the seismic performance such as deformation capacity, stiffness degradation and energy consumption, and the construction of the coupling beam is convenient and the structure is simple, which is conducive to engineering popularization and application. However, the brittleness of the concrete material itself makes ordinary concrete materials prone to brittle failure under the action of reciprocating loads such as earthquakes.

Due to the large difference in the performance characteristics of steel and concrete, this structural component will not be able to fully exert the ductility and energy dissipation capacity of the composite coupling beam due to premature cracking or compression of the concrete.

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