A channel steel slotted I-shape variable section steel core anti-buckling energy-dissipating support member

Abstract

The invention discloses a box iron grooving type H-shaped variable-cross-section steel core buckling-prevention limiting and energy-consumption supporting component and belongs to the technical field of buckling-prevention limiting and energy-consumption supporting components. Connection segments a, cross section local enlarging sections b and a buckling working section c are sequentially arranged from the two ends of a steel core to the middle of the steel core. The buckling working section c is located between the two cross section local enlarging sections b, and four wing positions, corresponding to the cross section local enlarging sections b of the H-shaped steel core, of an outer constraint steel pipe are provided with limiting grooves. The length of the limiting grooves is slightly larger than the length of the cross section local enlarging sections b, and four wings of the cross section local enlarging sections b extend out of the outer constraint steel pipe through the limiting grooves, the cross section of the H-shaped steel core is locally enlarged at the limiting grooves with the slope angle of 60 degrees till the cross section penetrates out of the limiting grooves of the outer constraint steel pipe. In the early stage of load bearing, the variable-cross-section steel core consumes energy and buckles, when deformation reaches the constrained point of the limiting grooves, the outer constraint steel pipe and the buckled steel core commonly provide axial rigidity, the constraint structure is integrally deformed, and the function of limiting displacement is achieved.

Description

technical field [0001] The invention belongs to the technical field of anti-buckling energy-dissipating support members, and relates to a new type of anti-seismic energy-dissipating and position-limiting support member for engineering structures, in particular, a built-in steel core with a variable cross-section I-shape and an outer restraint sleeve with an open Buckling-resistant energy-dissipating support members of channel-type butt-welded channel steel. In the early stage of loading, the variable cross-section steel core consumes energy and yields, and when the deformation reaches the restraint point of the limit groove, the external restraint steel pipe and the yielded steel core together provide axial stiffness, constrain the overall deformation of the structure, and realize the function of limiting displacement. Background technique [0002] Buckling-restrained brace is also called buckling-restrained brace or BRB (Bucklingrestrained brace). The product technology was...

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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