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| 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 |
| 投稿时间：2026-01-06 修订日期：2026-03-05 |
| 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 Hysteresis curve Energy dissipation capabilities. |
| 基金项目:安徽省高等学校研究重点项目(2022AH051860)；安徽省高校优秀科研创新团队(2023AH010059)；安徽省住房城乡建设科学技术计划项目(2021-YF41)； |
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| 中文摘要: |
| 主要针对外约束结构开孔、节点板厚度、加强板形式等方面问题，提出了一种新型开孔全钢屈曲约束构件支撑，对全钢屈曲约束支撑力学性能和耗能能力进行研究。通过低周往复加载试验，得到主要结论如下：实验证明了屈曲约束支撑构件的外约束构件开孔率为25%，支撑滞回曲线饱满，构件不会出现过早破坏；节点板厚度与支撑耗能系数呈现正相关，实验中节点板厚度增加33%，耗能系数提升30.3%；加长型4片式加强板能使屈曲控制支撑的核心构件破坏点下移，有效避免端部因破坏而发生断裂的风险，同时简化外约束构件的生产工序；建立了ABAQUS有限元模型，有限元分析结果与试验结果吻合良好，验证了采用显示动态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 geometry in the restraining mechanism, gusset plate thickness, and stiffener plates arrangement, affect the brace's mechanical behavior and energy dissipation capabilities.The results of the experiment show that:experimental results indicate that when the opening ratio is 25% in the outer restraining tube, the BRB achieved a sufficiently full and stable hysteresis curve, exhibiting no signs of premature failure. The gusset plate thickness exhibits a positive correlation with the energy dissipation coefficient of the braces. In the experiment, a 33% increase in gusset plate thickness resulted in a 30.3% enhancement in the energy dissipation coefficient. The extended four-piece stiffener plates enable the downward shift of the failure point in the core member of the buckling-restrained brace, effectively mitigating the risk of fracture caused by damage at the ends, while simplifying the manufacturing process of the external restraining components.In addition,an ABAQUS finite element model was established. The finite element analysis results show good agreement with the experimental data, verifying that the methodology of employing an explicit dynamic analysis step and directly introducing geometric imperfections into the numerical model possesses high feasibility and reliability. |
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