Z形截面柱的正截面受力性能研究
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摘要
Z形截面柱的正截面承载能力和多种因素有关,其正截面的双向偏压性是一个主要影响因素,双向偏压条件下的承载能力通常需要借助数值分析程序来完成求解。为了揭示其受压性能并简化相应的求解过程,对指定截面Z形柱的弯曲性能进行了试验研究与有限元分析,验证了Z形柱正截面的变形规律基本符合平截面假定,对比了Z形柱与矩形柱在破坏形态上的异同点。在试验结果与有限元计算结果较吻合的情况下,通过应变分析,确定了Z形柱正截面抗弯能力最强的方向和最弱的方向,最后给出了中和轴位置与弯矩作用方向的随动关系。
The performance on cross section of Z-shaped column have relations to many factors,and the bidirectional eccentricity of loads on the cross section is a key factor.Typically,the bidirectional eccentricity loads of it depends on the solutions of numerical simulation programs.To reveal the press-resistant performance of Z-shaped column and to simplify the programs on computer,it was carried out experiment study and finite element caculation,and confirmed the plane-section assumption on cross section of Z-shaped column,at the same time,it was contrasted the failure forms between rectangular column and Z-shaped column.Under the finite element solutions tallied with experiment results,by strain analysis,the locations of the strongest axis and the weakest axis relating to the bending-resistant capacity were ascertained.At last,a function concerning the locations of neutral axis and the directions of bending moment was proposed.
The performance on cross section of Z-shaped column have relations to many factors,and the bidirectional eccentricity of loads on the cross section is a key factor.Typically,the bidirectional eccentricity loads of it depends on the solutions of numerical simulation programs.To reveal the press-resistant performance of Z-shaped column and to simplify the programs on computer,it was carried out experiment study and finite element caculation,and confirmed the plane-section assumption on cross section of Z-shaped column,at the same time,it was contrasted the failure forms between rectangular column and Z-shaped column.Under the finite element solutions tallied with experiment results,by strain analysis,the locations of the strongest axis and the weakest axis relating to the bending-resistant capacity were ascertained.At last,a function concerning the locations of neutral axis and the directions of bending moment was proposed.
引文
[1]宁玉京.异形截面柱的受力特性及其正截面极限承载力分析[D].西安:西安建筑科技大学,2005.
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[4]吴敏哲,郭棣,施永昌.钢筋混凝土L形截面柱受力性能分析[J].世界地震工程,2002,18(1):66-72.
[5]杨俊杰.相似理论与结构模型试验[M].武汉:武汉理工大学出版社,2005.
[6]GB 50010-2002混凝土结构设计规范[S].
[7]JGJ 149-2006混凝土异形柱结构技术规程[S].
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[2]黄承逵,王丹,崔博.钢筋混凝土异形柱轴压比限值研究[J].大连理工大学学报,2002,42(2):213-217.
[3]姚俊淦,江见鲸.异形柱双向偏心受压正截面承载力分析及程序设计[J].力学与实践,2001,23(2):20-23.
[4]吴敏哲,郭棣,施永昌.钢筋混凝土L形截面柱受力性能分析[J].世界地震工程,2002,18(1):66-72.
[5]杨俊杰.相似理论与结构模型试验[M].武汉:武汉理工大学出版社,2005.
[6]GB 50010-2002混凝土结构设计规范[S].
[7]JGJ 149-2006混凝土异形柱结构技术规程[S].
[8]东南大学,同济大学,天津大学.混凝土结构设计原理[M].4版.北京:中国建筑工业出版社,2008.
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