A bushing buckling-inducing brace with variable-angle four-fold-type inducing units

Abstract

The invention discloses a sleeve buckling inducing support with variable-angle four-crease-type inducing units. The support comprises end constraint segments, a buckling inducing segment, an inner sleeve and an outer sleeve. The end constraint segments are located at the two ends of the buckling inducing segment, the buckling inducing segment is sandwiched between inner sleeve and the outer sleeve, and the inner sleeve and the outer sleeve are connected with the end constraint segments respectively. The buckling inducing segment is formed by at least one variable-angle four-crease-type inducing units in the axial direction of the support, and each variable-angle four-crease-type inducing unit is a space body formed by sequentially arranging m identical variable-angle four-crease-type subunits in the circumferential direction, wherein the section of the space body is a regular polygon. Each variable-angle four-crease-type subunit is a space body formed by folding four trapezoidal plates in the same plane. The buckling inducing support has good hysteretic energy dissipation performance and can achieve the effect of a damper; the support can be prefabricated in a factory, the component quality is guaranteed, the workload of on-site construction is reduced, and energy conservation and environment protection are achieved.

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 variable-angle four-fold induction units, 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 comp...

AI Technical Summary

Problems solved by technology

On June 1, 2016, the applicant proposed a casing-constrained buckling-resistant brace with symmetrical initial defects (application number 201610383428.8) and a casing-constrained buckling-resistant brace with diamond-shaped energy dissipation units (application number is 201610383133.0) 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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