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

Abstract

The invention discloses a bending induction support with a circumferential double-layer concave type induction unit at an end part. The bending induction support comprises a constraint section, an energy consumption section and a supporting flat-straight section, wherein the energy consumption section is arranged at two ends of the supporting flat-straight section and comprises at least one circumferential double-layer concave type induction unit along the axial direction of the support; and the circumferential double-layer concave type induction unit is a space body which is composed of m circumferential double-layer concave type subunits arranged sequentially along a circumferential direction and has a regular polygonal cross section, and each circumferential double-layer concave type subunit is a space body which is formed by folding six triangular plates and six trapezoidal plates in the same plane. The bending induction support disclosed by the invention keeps elasticity under the action of small shock, and enters a yield phase under the action of medium shock or big shock, and the good hysteretic energy consumption property of the bending induction support can achieve an effect of a damper. Compared with the conventional bending restraint support, the bending induction support disclosed by the invention reduces the workload of site construction operation, and is energy-saving and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of building structures, and in particular relates to a buckling-inducing support with circumferential 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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