A bushing buckling-inducing support with a central concave-type inducing unit

Abstract

The invention discloses a casing buckling induced support with central concave type induction units. The casing buckling induced support is composed of end constraint sections, a buckling induced section, an inner casing and an outer casing; the buckling induced section is clamped between the inner casing and the outer casing, the inner casing and the outer casing are respectively connected with one end constraint section, and the buckling induced section is formed by at least one central concave type induction unit along the axial direction of the support; each central concave type induction unit is of a space body provided with a positive-m polygonal section and formed by m central concave type subunits arrayed annularly and sequentially, each central concave type subunit is formed by folding collinearly of two trapezoidal plates and four triangle plates in pairs, and the trapezoidal plates and the triangle plates are located on the same plane. By the arrangement, the buckling induced support is kept elastic under the action of small earthquakes; the buckling induced section enters a buckling section under the action of medium or big earthquakes, and the effect of a damper can be achieved by the aid of good hysteretic dissipative energy performance.

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 a central concave-type inducing unit, 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 compress...

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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