A bushing buckling-inducing brace with circumferential Y-shaped inducing units

Abstract

The invention discloses a sleeve buckling inducing support with circular Y-type induction units. The sleeve buckling inducing support is composed of an end restraint section, a buckling inducing section, an inner sleeve and an outer sleeve. The buckling inducing section is composed of at least one circular Y-type inducing unit in the axial direction of the support. The single circular Y-type inducing unit circularly sequentially forms a space body with a section being an m-edge polygon by m identical circular Y-type subunits, and the circular Y-type subunits each are a space body formed by folding two triangular plates and two trapezoidal plates which are located on the same plane. The sleeve buckling inducing support retains elasticity under a small vibration effect; when a medium vibration or large vibration effect occurs, the buckling inducing section enters a yielding stage, and a good hysteresis energy dissipation performance can achieve an effect of a damper. The sleeve buckling inducing support with the circular Y-type induction units can be prefabricated in a factory, component quality is ensured, a site operation workload is reduced, and the sleeve buckling inducing support saves energy and is environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of building structures, in particular to a casing buckling induction support with a circumferential Y-shaped induction unit, 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 under compression and ...

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 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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