| 受火后钢筋混凝土连续T形梁承载力试验研究 |
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| 引用本文： | 项凯,王国辉.受火后钢筋混凝土连续T形梁承载力试验研究[J].西南交通大学学报,2011,46(6):933-939. |
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| 作者姓名： | 项凯 王国辉 |
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| 作者单位： | 公安部天津消防研究所,天津,300381 |
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| 基金项目： | 公安部应用创新项目(2010YYCXTJXF135) |
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| 摘 要： | 为探讨受火冷却作用对混凝土连续梁承载力的影响,对3根钢筋混凝土连续T形梁的承载力进行了试验研究,并用有限元法对试验结果进行了参数分析,提出了受火冷却后钢筋混凝土连续梁极限荷载的简化计算方法.结果表明:受火冷却后,钢筋混凝土连续T形梁的跨中屈服荷载、极限荷载和刚度均下降,承载力降幅明显低于刚度降幅；在受火120 min内,配筋率对受火冷却后钢筋混凝土连续T形梁的承载力有显著影响,而受火时间和混凝土强度的影响有限；按照简化计算方法计算的钢筋混凝土连续T形梁的极限荷载与试验值吻合较好.
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| 关 键 词： | 火灾 钢筋混凝土梁 承载力 试验 数值模拟 |
Experimental Research on Load-Bearing Capacity of Fire-Damaged Reinforced Concrete Continuous T-Beams |
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| XIANG Kai
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WANG Guohui.Experimental Research on Load-Bearing Capacity of Fire-Damaged Reinforced Concrete Continuous T-Beams[J].Journal of Southwest Jiaotong University,2011,46(6):933-939. |
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| Authors: | XIANG Kai WANG Guohui |
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| Institution: | XIANG Kai,WANG Guohui(Tianjin Fire Research Institute of the Ministry of Public Security,Tianjin 300381,China) |
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| Abstract: | In order to research the effects of heating and cooling on the load-bearing capacity of fire-damaged reinforced concrete(RC) continuous beams,loading tests of three RC continuous T-beams were conducted.A parametric analysis for the load-bearing capacity of fire-damaged RC continuous beams were carried out with the finite element method.A simplified method for evaluating the ultimate load of RC continuous beams after fire was presented.The research results show that a fire-damaged RC continuous T-beam exhibi... |
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| Keywords: | fire reinforced concrete beam bearing capacity experiment numerical simulation |
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