| 马巍,李梦楠,沈小璞,胡元超.开孔全钢屈曲约束支撑抗震性能试验与数值模拟研究[J].安徽建筑大学学报,2026,34(4):20-28 |
| 开孔全钢屈曲约束支撑抗震性能试验与数值模拟研究 |
| Experimental and Numerical Simulation Study on Seismic Performance of Perforated All-Steel Buckling-Restrained Braces |
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| DOI： |
| 中文关键词: 外约束结构开孔 全钢屈曲约束支撑 有限元模拟 滞回性能 耗能系数 |
| 英文关键词: open-hole restraining members all-steel buckling-restrained brace finite element modeling hysteretic performance energy dissipation capabilities |
| 基金项目:安徽省高等学校自然科学研究重点项目（2022AH051860）；安徽省高校优秀科研创新团队项目（2023AH010059）；安徽省住房城乡建设科学技术计划项目（2021-YF41） |
| 作者 | 单位 | | 马巍 | School of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China | | 李梦楠 | School of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China | | 沈小璞 | School of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China；Key Laboratory of Building Structures of Anhui Higher Education Institutes,Hefei 230088,China | | 胡元超 | Key Laboratory of Building Structures of Anhui Higher Education Institutes,Hefei 230088,China |
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| 中文摘要: |
| 针对屈曲约束支撑易断头、自重大等问题，本文围绕外约束结构开孔、节点板厚度与加强板形式开展优化，提出一种新型开孔全钢屈曲约束支撑构件，研究全钢屈曲约束支撑的力学性能和耗能能力。通过低周往复加载试验，证明了屈曲约束支撑构件的外约束构件开孔率为25%时，支撑滞回曲线饱满，构件不会过早破坏；节点板厚度与支撑耗能系数呈正相关，节点板厚度增加33%，耗能系数提升30.3%；加长型四片式加强板能使屈曲约束支撑的核心构件破坏点下移，有效避免端部破坏断裂风险，同时简化外约束构件的生产工序；建立ABAQUS有限元模型，有限元分析结果与试验结果吻合良好，验证了采用显式动力学分析步并将几何缺陷直接引入数值模型的方法具有较高的可行性和可靠性。 |
| 英文摘要: |
| This study introduces the configuration and features of an all-steel buckling-restrained brace (BRB) with perforated restraining members. Particular attention is given to evaluating how critical design parameters, such as the opening layout of restraining members, gusset plate thickness, and stiffener configuration, affect the brace mechanical performance and energy-dissipating capacity. Experimental results indicate that when the opening ratio of the outer restraining members reaches 25%, the brace exhibits plump hysteretic curves without premature failure. The thickness of the gusset plate shows a positive correlation with the energy dissipation coefficient of the brace: a 33% increase in gusset plate thickness results in a 30.3% enhancement in the energy dissipation coefficient. Extended four-piece stiffener plates can shift the failure position of the core member downward, effectively reducing the risk of end fracture, while simplifying the fabrication process of the outer restraining components. In addition, an ABAQUS finite element model is established. The finite element analysis results show good agreement with the experimental data, thereby validating that the methodology of adopting explicit dynamic analysis steps and directly importing geometric imperfections into the numerical model is highly feasible and reliable. |
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