屈曲约束支撑与普通支撑钢框架结构的抗震性能对比

付康; 赖庆文; 叶梓; 申晨龙

doi:10.3724/j.gyjzG23072409

屈曲约束支撑与普通支撑钢框架结构的抗震性能对比

doi: 10.3724/j.gyjzG23072409

1. 贵州省建筑设计研究院有限责任公司, 贵阳 550081;
2. 东南大学土木工程学院, 南京 210096

详细信息

作者简介:
付康，硕士，国家注册土木工程师（岩土），主要从事结构和岩土工程设计工作。电子信箱:258444027@qq.com

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出版历程
- 收稿日期: 2023-07-24
- 网络出版日期: 2025-11-05

Seismic Performance Comparison of Steel Braced Frames with Buckling-Restrained Braces and Conventional Braces

1. Architectural Design and Research Institute of Guizhou Province, Guiyang 550081, China;
2. School of Civil Engineering, Southeast University, Nanjing 210096, China

摘要

摘要: 准确模拟钢支撑的屈曲、断裂等强非线性行为是钢支撑框架结构抗震性能分析的关键。在OpenSEES软件中，建立考虑初始缺陷的纤维梁柱单元模型来模拟普通支撑的屈曲，采用Coffin-Manson关系来描述屈曲约束支撑和普通支撑的低周疲劳性能，支撑滞回模拟结果验证了该方法的可行性。基于上述支撑模拟方法，对相同建筑条件下按规范设计的屈曲约束支撑与普通支撑钢框架进行了抗震性能对比分析。结果表明：屈曲约束支撑面积需求小于普通支撑，普通支撑钢框架推覆曲线具有较大的初始刚度，然而普通支撑屈曲会引起结构承载力骤降；罕遇地震下屈曲约束支撑钢框架的各种结构响应均小于普通支撑钢框架；多次强震下普通支撑出现断裂现象而屈曲约束支撑均未断裂，与罕遇地震下结构响应相比，多次强震下两种结构的响应均增大，普通支撑钢框架的增大程度高于屈曲约束支撑钢框架。
- 滞回曲线 /
- 低周疲劳性能 /
- 屈曲约束支撑钢框架 /
- 普通支撑钢框架 /
- 抗震性能
Abstract: The seismic performance analysis of a steel braced frame focuses on accurately simulating the strong nonlinear behavior of steel braces， including buckling and fracture. In OpenSEES software， a fiber beam-column element model with initial imperfection was used to simulate the buckling behavior of conventional steel braces （CBs）， while the Coffin-Manson relationship was employed to describe the low-cycle fatigue properties of both buckling-restrained braces （BRBs） and CBs.The hysteretic simulation results of the braces verified the method's feasibility. Based on this simulation approach， the seismic performance of buckling-restrained braced frames （BRBFs） and conventional braced frames （CBFs） was comparatively analyzed. Both systems were designed for the same building conditions following code requirements.The results showed that the area demand of the BRB was less than that of the CB， and the pushover curve of the CBF had a larger initial stiffness， while the buckling of the CB led to a sudden decrease in the structural bearing capacity.The structural responses of the BRBF were lower than those of the CBF under rare earthquakes. Under repeated strong earthquakes， some conventional braces （CBs） fractured， while all buckling-restrained braces （BRBs） remained intact.Compared to structural responses under rare earthquakes， both structural systems exhibited increased responses under repeated strong earthquakes， with conventional braced steel frames demonstrating greater response amplification than buckling-restrained braced frames.
- hysteretic curve /
- low-cycle fatigue properties /
- buckling-restrained braced steel frame /
- conventional braced steel frame /
- seismic performance

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参考文献(12)

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