Buckling induction support of casing with inducing unit of groove type

Abstract

The invention discloses a buckling induction support of casing with inducing units of a groove type, comprising end constraint sections, a buckling induction section, an inner sleeve and an outer sleeve. The buckling induction section is clamped between the inner sleeve and the outer sleeve. The end constraint sections are respectively connected with the inner sleeve and the outer sleeve. The buckling induction section comprises at least one inducing unit of groove type along the axis direction of the support. The inducing unit of the groove type forms a spatial entity by m same inducing sub units of the groove type arranged along the circumferential direction. The inducing sub units of the groove type are spatial entities folded by four triangular plates arranged in a same plane. The buckling induction support has the advantages of keeping elasticity under an action of small shock, having good hysteretic energy dissipation performance when entering a yielding stage under the action of moderate and strong shock and playing 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-inducing support with notched groove-type inducing units, 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 compressio...

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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