| 火灾后型钢混凝土框架结构力学性能试验研究及分析 |
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| 引用本文： | 张超,薛素铎,王广勇,张东明.火灾后型钢混凝土框架结构力学性能试验研究及分析[J].工程力学,2018,35(5):152-161. |
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| 作者姓名： | 张超 薛素铎 王广勇 张东明 |
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| 作者单位： | 1.城市与工程安全减灾教育部重点实验室, 北京工业大学, 北京 100124;;2.建筑防火研究所, 中国建筑科学研究院有限公司, 北京 100013;;3.中国建筑技术集团有限公司, 中国建筑科学研究院有限公司, 北京 100013 |
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| 基金项目： | 国家自然科学基金项目（51778595）；北京市自然科学基金项目（8172052）；国家重点研发计划项目（2017YFC0803302） |
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| 摘 要： | 考虑受火时间、荷载比等参数的影响，对火灾后型钢混凝土框架结构的破坏形态、变形性能以及剩余承载力等火灾后性能进行了试验研究。试验结果表明：火灾后型钢混凝土框架梁出现3个塑性铰而破坏，梁端弯剪变形明显，剪压区混凝土均出现部分脱落。随着受火时间的增加，型钢混凝土框架的剩余承载力逐渐减小。同时，建立了考虑升降温及火灾后全过程的火灾后型钢混凝土框架力学性能分析模型。计算结果与试验结果对比表明，二者吻合较好。可见，提出的模型是正确的。
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| 关 键 词： | 火灾后 型钢混凝土 框架结构 塑性铰 剩余承载力 |
| 收稿时间： | 2017-01-17 |
| 修稿时间： | 2017-08-24 |
EXPERIMENTAL RESEARCH AND ANALYSIS ON THE POST-FIRE PERFORMANCE OF STEEL REINFORCED CONCRETE FRAME STRUCTURES |
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| ZHANG Chao,XUE Su-duo,WANG Guang-yong,ZHANG Dong-ming.EXPERIMENTAL RESEARCH AND ANALYSIS ON THE POST-FIRE PERFORMANCE OF STEEL REINFORCED CONCRETE FRAME STRUCTURES[J].Engineering Mechanics,2018,35(5):152-161. |
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| Authors: | ZHANG Chao XUE Su-duo WANG Guang-yong ZHANG Dong-ming |
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| Affiliation: | 1.Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Beijing 100124, China;;2.Institute of Building Fire Research, China Academy of Building Research Co., Ltd., Beijing 100013, China;;3.China Building Technology Group Co., Ltd, China Academy of Building Research Co., Ltd., Beijing 100013, China |
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| Abstract: | An experiment was carried out to study the post-fire performance of steel reinforced concrete frame (SRCF) structures including the failure mode, deformability and residual load bearing capacity considering parameters including the fire duration and load ratio. The test results show that the failure of SRCF was induced by three plastic hinges occurred in the SRCF beam; the flexure-shear deformation was significant in the beam end; a part of concrete separated from the shear-compression zone of the frame beam. The results also show that the residual load bearing capacity of SRCFs decreases gradually with the increase of the fire duration. Based on the test, an analysis model for the post-fire performance of SRCFs under fire including heating, cooling and post-fire phases was proposed. The calculation results agree well with those of the test, which shows that the proposed numerical simulation method is accurate. |
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| Keywords: | post-fire steel reinforced concrete frame structures plastic hinge residual load bearing capacity |
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