Sleeve buckling inducing support with length-variable double-layer indent-type inducing units

Abstract

The invention discloses a sleeve buckling inducing support with length-variable double-layer indent-type inducing units. The sleeve buckling inducing support is composed of end restraining sections, a buckling inducing section, an inner sleeve and an outer sleeve; the buckling inducing section is composed of the at least one length-variable double-layer indent-type inducing unit in the axis direction of the support, and the end faces of the length-variable double-layer indent-type inducing units located on the two sides of the buckling inducing section are planes; each length-variable double-layer indent-type inducing unit is provided with a space body formed by annularly and sequentially arranging m same annular double-layer indent-type subunits, the cross section of each space body is in a 2m-side polygon shape, and each annular double-layer indent-type subunit is a space body formed by folding six triangular plates and six trapezoidal plates in one plane. According to the sleeve buckling inducing support, under the effect of a small earthquake, elasticity is kept; when a medium earthquake or a large earthquake acts, the buckling inducing section gets into the buckled stage, and the good hysteresis energy dissipation performance can achieve the effect of a damper.

Description

technical field [0001] The invention belongs to the technical field of building structures, and in particular relates to a casing buckling induction support with variable-length double-layer concave induction units, which is suitable for steel structures or concrete structures with buckling restraint 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...

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 thickness and structure of the energy-dissipating unit at the crease in the above support are the same as those at the non-crease, which is not conducive to the generation of plastic hinges at the crease.

In addition, these supports are composed of end restraint segments, buckling segments, and sleeves. The sleeves are on the outside of the buckling segment, and there is no support on the inside of the buckling segment, which is prone to low-order instability toward the inside, thereby weakening the energy dissipation capacity of the support.

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