高温和轴向荷载下钢筋混凝土柱的力学行为
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摘要
对于高温下混凝土柱的破坏问题,借助有限元分析软件ANSYS对轴心受压的钢筋混凝土柱在不同环境温度下承受相同轴向荷载时的力学行为进行研究.结果表明:钢筋混凝土柱的位移在各个环境温度下均呈现出自上而下逐渐降低的分层现象;钢筋混凝土模型显现出较为明显的温度效应;等效应力在模型中整体分布较为均匀,只在约束面自内向外有较为明显的升高,在约束面的边角处达到最大值.
For the destruction of concrete columns at high temperature,the mechanical behavior of axially loaded reinforced concrete columns was studied based on the finite element analysis software ANSYS at different temperatures.The results show that the reinforced concrete columns show a downward deformation from top to bottom at all ambient temperatures.Meanwhile,the column shows a more obvious temperature effect.The overall distribution of equivalent stress is almost uniform in the model.Yet,there is a significant increase from the inside constraint surface to the outside constraint surface,and the equivalent stress reaches the maximum value at the boundary of the constraint surface.
For the destruction of concrete columns at high temperature,the mechanical behavior of axially loaded reinforced concrete columns was studied based on the finite element analysis software ANSYS at different temperatures.The results show that the reinforced concrete columns show a downward deformation from top to bottom at all ambient temperatures.Meanwhile,the column shows a more obvious temperature effect.The overall distribution of equivalent stress is almost uniform in the model.Yet,there is a significant increase from the inside constraint surface to the outside constraint surface,and the equivalent stress reaches the maximum value at the boundary of the constraint surface.
引文
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[7]徐玉野,吴波,王荣辉,等.高温后钢筋混凝土梁剩余承载性能试验研究[J].建筑结构学报,2013(34):20-29.XU Y Y,WU B,WANG R H,et al.Experimental study on residual performance of reinforced concrete beams after fire[J].Journal of Building Structures,2013(34):20-29.
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[9]顾敏峰.高温下钢筋混凝土柱温度场模拟及力学性能研究[D].西安:长安大学,2012.GU M F.Temperature field simulation and research on mechanicsl profermance of reinforced concrete columns ubder high temperature[D].Xi’an:Chang’an University,2012.
[10] GB 50010-2010,混凝土结构设计规范[S].
[2]夏开文,程经毅,胡时胜.SHPB装置应用于测量高温动态力学性能的研究[J].实验力学,1998(3):32-38.
[3]王孔藩,许清风,刘挺林.高温下及高温冷却后混凝土力学性能的试验研究[J].施工技术,2005(8):1-3.DOI:10.3969/j.issn.1002-8498.2005.08.001.WANG K F,XU Q F,LIU T L.Experimental research on mechanics performance of concrete after high temperature and cooled down from high temperature[J].Construction Technology,2005(8):1-3.DOI:10.3969/j.issn.1002-8498.2005.08.001
[4]姚家伟,宋玉普,张众.普通混凝土三轴压强度和变形试验研究[J].建筑科学,2011,27(7):28-31.DOI:10.3969/j.issn.1002-8498.2005.08.001.YAO J W,SONG Y P,ZHANG Z.Experimental study on strength and deformation characteristic of normal concrete under triaxial compression[J].Building Science,2011,27(7):28-31.DOI:10.3969/j.issn.1002-8498.2005.08.001.
[5]谢狄敏,钱在兹.高温作用后混凝土抗拉强度与粘结强度的试验研究[J].浙江大学学报(自然科学版),1998(5):87-92.
[6]时旭东,过镇海.高温下钢筋混凝土受力性能的试验研究[J].土木工程学报,2000(6):6-16.
[7]徐玉野,吴波,王荣辉,等.高温后钢筋混凝土梁剩余承载性能试验研究[J].建筑结构学报,2013(34):20-29.XU Y Y,WU B,WANG R H,et al.Experimental study on residual performance of reinforced concrete beams after fire[J].Journal of Building Structures,2013(34):20-29.
[8]吴波,何喜洋.高温下钢筋混凝土框架的内力重分布研究[J].土木工程学报,2006(39):54-61.DOI:10.3321/j.issn:1000-131X.2006.09.009.WU B,HE X Y.A study on the redistribution of internal forces in reinforced concrete frames under high temperature[J].China Civil Engineering Journal,2006(39):54-61.DOI:10.3321/j.issn:1000-131X.2006.09.009.
[9]顾敏峰.高温下钢筋混凝土柱温度场模拟及力学性能研究[D].西安:长安大学,2012.GU M F.Temperature field simulation and research on mechanicsl profermance of reinforced concrete columns ubder high temperature[D].Xi’an:Chang’an University,2012.
[10] GB 50010-2010,混凝土结构设计规范[S].