A bushing buckling-inducing brace with extended pineapple-shaped inducing units

Abstract

The invention discloses a sleeve buckling induction support with lengthened-pineapple-shaped induction units. The sleeve buckling induction support is composed of 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 which are each connected with one end constraint section. The buckling induction section is composed of at least one lengthened-pineapple-shaped induction unit in the axial direction of the support. Each lengthened-pineapple-shaped induction unit is a space body formed by sequentially arranging m identical lengthened-pineapple-shaped sub units in the circumferential direction, and the section of the space body is a 2m-polygon. Each lengthened-pineapple-shaped sub unit is a space body formed by folding four triangular plates and two trapezoidal plates located in the same plane. The sleeve buckling induction support keeps elasticity under the effect of a small earthquake, the buckling induction section enters a yielding stage under the effect of a medium earthquake or a large earthquake, and the effect of a damper can be achieved by means of the good hysteretic energy consumption performance of the support.

Description

technical field [0001] The invention belongs to the technical field of building structures, and in particular relates to a bushing buckling induction support with an extended pineapple-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 c...

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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