A buckling-inducing brace with variable-length double-layer concave-type inducing units at the end

Abstract

The invention discloses a buckling induction support with variable-length double-layer concave induction units at the end. The support comprises a constraint segment, energy dissipation segments and a straight support segment. The energy dissipation segments are mounted on the two ends of the straight support segment. Each energy dissipation segment is formed by at least one variable-length double-layer concave induction unit in the axial direction of the support. Each variable-length double-layer concave induction unit is a space body formed by sequentially arranging m variable-length double-layer concave subunits in the circumferential direction, wherein the section of the space body is a regular polygon. Each variable-length double-layer concave subunit is a space body formed by folding six triangular plates and six trapezoidal plates in the same plane. The buckling induction support keeps elasticity under the work of small earthquakes and enters a buckling stage under the work of medium earthquakes or major earthquakes, and the buckling induction support can achieve the effect of a damper due to the good hysteretic energy dissipation performance. Compared with a traditional buckling constraint support, the workload of on-site construction is reduced in the manufacturing process, and energy conservation and environment protection are achieved.

Description

technical field [0001] The invention belongs to the technical field of building structures, and in particular relates to a buckling-inducing support with variable-length double-layer concave-type inducing units at the end, which is suitable for steel structures or concrete structures with buckling-constrained supports. Background technique [0002] During the use of steel structures or reinforced concrete structures, ordinary supports will buckle under compression. When the supports buckle under compression, the stiffness and bearing capacity will decrease sharply. Under the action of earthquake or wind, the internal force of the support changes back and forth under the two states of compression and tension. When the support gradually changes from the buckling state to the tension state, the internal force and stiffness of the support are close to zero. Therefore, the hysteretic performance of ordinary supports is poor under repeated loads. In order to solve the problem of...

AI Technical Summary

Problems solved by technology

On June 1, 2016, the applicant proposed an energy-dissipative buckling-constrained support with symmetrical initial defect units at the end (application number 201610383430.5) and a buckling-controlled support with diamond-shaped energy-dissipating units at the end (application No. 201610380804.8) has a fixed geometric configuration and little design flexibility

Moreover, the structure and plate thickness of the energy-dissipating units in the above-mentioned support at the crease are consistent with those at the non-crease, which is not conducive to the generation of plastic hinges at the crease.

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