A bushing buckling-inducing brace with variable-length pineapple-shaped inducing units

Abstract

The invention discloses a bushing buckling induction support with variable-length pineapple-shaped induction units. Composed along the axial direction of the support, the end faces of the variable-length pineapple-shaped induction units located on both sides of the buckling induction section are planes truncated by a cross-section perpendicular to the axial direction and passing through the apex; the single variable-length pineapple-shaped The inducing unit is composed of m identical variable-length pineapple-shaped subunits arranged in turn along the ring direction to form a space body with a polygonal cross-section. The present invention adopts the casing buckling-inducing support with pineapple-shaped induction units of variable length. Under the action of small earthquakes, the buckling-inducing support maintains elasticity. The energy recovery performance can also act as a damper.

Description

technical field [0001] The invention belongs to the technical field of building structures, and in particular relates to a bushing buckling-inducing support with variable-length pineapple-shaped 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 un...

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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