| 某框支砌体结构火灾倒塌事故的模拟与分析 |
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| 引用本文： | 李易,陆新征,英明鉴,叶列平,闫维明.某框支砌体结构火灾倒塌事故的模拟与分析[J].工程力学,2014,31(2):66-72. |
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| 作者姓名： | 李易 陆新征 英明鉴 叶列平 闫维明 |
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| 作者单位： | 1.北京工业大学建筑工程学院城市与工程安全减灾教育部重点实验室, 北京 100124; |
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| 基金项目： | 国家973项目(2012CB719703);国家自然科学基金项目(51208011);上海市工程结构新技术重点实验室开放课题(2011-KF02);北京市教委科研计划项目(KM201310005025);国家博士后科学基金项目(2012M510301);北京市博士后科研项目(2012ZZ-13) |
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| 摘 要： | 火灾下建筑结构的倒塌是整体结构系统的力学行为。由于整体结构火灾试验难度较大, 数值模拟是研究整体结构火灾行为的重要手段。该文采用考虑高温作用的纤维梁和分层壳模型以及生死单元技术, 对一实际框支砌体结构的火灾倒塌事故进行了分析, 模拟了整体结构在火灾作用下的倒塌过程, 指出了引起结构火灾倒塌的关键原因, 并根据数值分析结果对火灾下抗连续倒塌设计提出了改进建议。
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| 关 键 词： | 火灾倒塌 框支砌体结构 数值模拟 纤维梁 事故分析 |
| 收稿时间： | 2013-04-09 |
THE SIMULATION AND ANALYSIS OF THE COLLAPSE OF A FRAME-SUPPORTED MASONRY STRUCTURE UNDER FIRE |
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| Affiliation: | 1.Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China; 2. Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing. 100084, China) |
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| Abstract: | The fire-induced collapse of building structures is the mechanical behavior of entire structural systems. Due to the difficulty in the fire test for overall structural systems, numerical simulation is an important method to study the global behaviors of structures under fire. The fiber beam model, multi-layer shell model and elemental deactivation technology that allows for the effect of high temperature are used to simulate a real fire-induced collapse accident of a frame-supported masonry building. The primary reason of the collapse is pointed out. Design recommendations to improve of the progressive collapse resistance of building structures are also proposed based on the numerical results. |
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