The hysteretic behavior and working mechanism of self-centering steel buckling-restrained braces

被引：0
|
作者：
Xu L.-H. [1 ]
Chen P. [1 ]
机构：
[1] School of Civil Engineering, Beijing Jiaotong University, Beijing
来源：
Gongcheng Lixue/Engineering Mechanics | 2020年 / 37卷 / 12期
关键词：
Buckling-restrained brace; Combined disc springs; Residual deformation; Restoring force model; Self-centering performance;
D O I：
10.6052/j.issn.1000-4750.2020.01.0034
中图分类号：
学科分类号：
摘要：
A novel self-centering steel buckling-restrained brace (SC-SBRB) is proposed, which is mainly comprised of a buckling-restrained energy-dissipation system and a self-centering system of pre-pressed disc springs in parallel. The fundamental configuration and working mechanism of the SC-BRB are introduced. A restoring force model that accurately describes the unique hysteretic behavior of the SC-SBRB is established. Four solid numerical models of SC-SBRBs with different design parameters are built using ABAQUS finite element software. The hysteretic behavior and self-centering performance of the SC-SBRB under cyclic loading are studied and compared with the calculation results of the restoring force model. The results demonstrate that the SC-SBRB exhibits a stable and full flag-shaped hysteretic response under cyclic loadings, and that the proposed restoring force model is capable of accurately predicting the mechanical properties at different stages. The self-centering performance of the SC-SBRB is gradually exerted as the initial pre-pressed force of disc springs increases, while the residual deformation is reduced simultaneously. The maximum residual deformation ratio of the brace is decreased to 0.039% when the self-centering ratio is 1.0, indicating a good coordination of the self-centering and energy-dissipation performance. Copyright ©2020 Engineering Mechanics. All rights reserved.
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页码：147 / 156
页数：9
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