An energy-dissipating support member for anti-buckling and energy-dissipating support of square steel pipe with variable cross-section steel core assembled with cross-shaped bolts

Abstract

The invention relates to a rectangular steel tube variable-cross-section steel core anti-buckling limiting energy dissipation supporting member assembled with a bolt shaped like a Chinese character 'tian', and belongs to the technical field of anti-buckling supporting. The anti-buckling limiting energy dissipation supporting member comprises a cross-shaped steel core and an outer limiting body, the cross-shaped steel core is located in the outer limiting body, and four spaces defined by the steel core and the outer limiting body are respectively filled with a light-gauge steel section concrete filled steel tube. The anti-buckling limiting energy dissipation supporting member is characterized in that the partial cross section of the steel core becomes large, a limiting groove (3) is formed in the position, corresponding to a partial cross section largened section c, of the outer limiting body, the groove length of the limiting groove (3) is slightly larger than the section length of the corresponding partial cross section largened section, and the portion, located on a partial cross section largened section b, of the cross-shaped steel core outwards extends out of the outer limiting body through a corresponding limiting groove. After the steel core is deformed and buckled, an outer limiting steel tube and the axial stiffness of the buckled steel core are used for limiting the whole displacement of the structure to achieve the limiting target.

Description

technical field [0001] The invention belongs to the technical field of anti-buckling bracing, and relates to an anti-seismic energy consumption and position-limiting support member of an engineering structure, in particular to an anti-buckling energy consumption limiter in which the steel core is a cross-shaped variable cross-section and the outer restraint steel pipe is assembled with square bolts. support member. In the early stage of loading, the energy consumption of the steel core is yielded, and in the later stage, the externally restrained steel pipe and the steel core after yielding jointly provide stiffness to limit the overall lateral movement of the structure, achieving the effect of limiting the position. Background technique [0002] Buckling-resistant bracing (BRB) is a kind of bracing form with dual functions of ordinary bracing and metal damper. The gap is used to release the expansion deformation produced by the supporting steel core under compression. Buc...

AI Technical Summary

Problems solved by technology

The current research and development of anti-buckling braces mainly focuses on improving their energy dissipation capacity, and there are few studies on the limiting effect of buckling-resistant braces

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