A Casing Buckling-Inducing Brace with Oblique Helical Inducing Units

Abstract

The invention discloses a casing buckling induction support with an oblique spiral type induction unit. The buckling induction section is composed of an end restraint section, a buckling induction section, an inner casing and an outer casing, and is sandwiched between the inner casing and the outer casing. , the inner casing and the outer casing are respectively connected with an end restraint section, the buckling induction section is composed of at least one oblique helical induction unit along the axis of the support, and the oblique helical induction unit is composed of m oblique helical induction units The subunits are arranged in sequence along the oblique direction to form a space body with a helical section; the oblique spiral subunit is a space body formed by collinear folding of two triangular plates located in the same plane. The bushing buckling induction support of the present invention maintains elasticity under the action of a small earthquake, and the buckling induction section enters the yielding stage under the action of a moderate earthquake or a large earthquake, and its good hysteretic energy dissipation performance can also play a role in damping device effect.

Description

technical field [0001] The invention belongs to the technical field of building structures, in particular to a casing buckling induction support with oblique spiral 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 compression and poor hyster...

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.

Images