A Buckling Induced Brace with Two-way Helical Induced Units at the End

Abstract

The invention discloses a bending induction support with two-way spiral type induction units at the ends. The bending induction support comprises restraining sections, energy consumption sections and a support straight section; the energy consumption sections are installed at the two ends of the support straight section, and each energy consumption section is composed of one or more two-way spiral type induction units in the axial direction of the support; each two-way spiral type induction unit is a space body with the cross section being a regular m-polygon, and the space body is formed by arranging m two-way spiral type induction subunits in the circumferential direction in sequence; each two-way spiral type induction subunit is a space body formed by folding four triangle plates in a two-two collineation mode. According to the bending induction support, under the effect of small earthquakes, the bending induction support keeps elasticity; under the effect of middle earthquakes or large earthquakes, the bending induction support enters a yield stage, and hysteric energy performance of the casing pipe bending induction support can have the effect of a damper; and compared with a traditional bending restraining support, the bending induction support reduces the working amount of in-place construction, saves energy and protects the environment.

Description

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

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 geometry 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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