预测混凝土T形柱受剪承载力新思路
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摘要
通过钢筋混凝土T形柱轴心受压承载力试验及Ansys有限元实体模型非线性分析,证实Ansys有限元实体模型能够较准确地模拟、预测异形柱轴心受压承载力-变形全曲线。在此基础上,对异形柱低周往复加载试验中某一T形柱进行有限元实体模型轴心受压承载力分析,并将其轴心受压承载力-变形全曲线转化为Beam189单元的本构模型,进而利用Beam189单元对T形柱构件进行受剪承载力模拟,并与其低周往复加载试验结果及《混凝土异形柱结构技术规程》(JGJ 149-2006)计算结果进行分析比较。结果表明:利用该方法计算异形柱受剪承载力与《规程》计算结果非常相似,与低周往复加载试验结果相比较高,同时利用该方法可以获取异形柱受剪过程中更多的数据信息,为异形柱受剪承载力预测、研究提供了1种切实可行的方法。
Through axial compression capacity test and Ansys finite element nonlinear analysis of solid model of T shaped reinforced concrete columns,it is proved that Ansys finite element solid model could simulate and predict axial pressure-deformation curve of specially shaped columns accurately.On this basis,a T shaped column under low frequency cyclic loading was analyzed by finite element under axial compression,and the axial pressure-deformation curve was transformed with the constitutive model of Beam189,then the T shaped column was simulated by Beam189 under shear capacity,at last the FEA results were compared with test results under low frequency cyclic loading and calculation results based on specification for concrete structure with specially shaped columns.It is shown that the results following this idea are very similar with the results based on specification for concrete structure with specially shaped columns,but higher than the test results,and more data can be obtained using this idea,which could be a practical approach to predict and study the specially shaped columns under shear.
Through axial compression capacity test and Ansys finite element nonlinear analysis of solid model of T shaped reinforced concrete columns,it is proved that Ansys finite element solid model could simulate and predict axial pressure-deformation curve of specially shaped columns accurately.On this basis,a T shaped column under low frequency cyclic loading was analyzed by finite element under axial compression,and the axial pressure-deformation curve was transformed with the constitutive model of Beam189,then the T shaped column was simulated by Beam189 under shear capacity,at last the FEA results were compared with test results under low frequency cyclic loading and calculation results based on specification for concrete structure with specially shaped columns.It is shown that the results following this idea are very similar with the results based on specification for concrete structure with specially shaped columns,but higher than the test results,and more data can be obtained using this idea,which could be a practical approach to predict and study the specially shaped columns under shear.
引文
[1]CHEN Cheng Chih,LI Jian-ming,Weng C C.Experi-mental behaviour and strength of concrete-encasedcomposite beam-columns with T-shaped steel sectionunder cyclic loading[J].Journal of ConstructionalSteel Research.2005,61(7):863-881.
[2]WANG Tie cheng,ZHANG Xue hui.Research on fra-me property of different story height with speciallyshaped columns under cyclic loading[J].Journal ofCentral South University of Technology,2010,17(6):1364-1369.
[3]李晓莉,郭棣,吴敏哲.T形截面柱的非线性分析[J].世界地震工程,2005,21(3):122-125.
[4]李杰,吴建营,周德源,等.L形和Z形宽肢异形柱低周反复荷载试验研究[J].建筑结构学报,2002,23(1):9-15.
[5]陈宗平,薛建阳,赵鸿铁,等.低周反复荷载作用下型钢混凝土异形柱的抗剪承载力分析[J].土木工程学报,2007,40(7):30-36.
[6]陈昌宏,单建,马乐为,等.钢筋混凝土异形柱框架节点抗震性能试验[J].工业建筑,2007,37(2):6-10.
[7]张学辉,李其廉.高轴力下钢筋混凝土异形柱节点受力性能研究[J].河北科技大学学报,2010,31(5):472-478.
[8]王滋军,刘伟庆,蒋永生,等.中高层钢筋混凝土异形柱框架结构试验与理论研究[J].地震工程与工程振动,2002,22(5):62-65.
[9]中华人民共和国建设部.JGJ 149-2006混凝土异形柱结构技术规程[S].北京:中国建筑工业出版社,2006.
[10]郭棣,吴敏哲,艾兵.T形截面柱框架的抗震性能分析[J].西安建筑科技大学学报,2003,35(3):205-207.
[2]WANG Tie cheng,ZHANG Xue hui.Research on fra-me property of different story height with speciallyshaped columns under cyclic loading[J].Journal ofCentral South University of Technology,2010,17(6):1364-1369.
[3]李晓莉,郭棣,吴敏哲.T形截面柱的非线性分析[J].世界地震工程,2005,21(3):122-125.
[4]李杰,吴建营,周德源,等.L形和Z形宽肢异形柱低周反复荷载试验研究[J].建筑结构学报,2002,23(1):9-15.
[5]陈宗平,薛建阳,赵鸿铁,等.低周反复荷载作用下型钢混凝土异形柱的抗剪承载力分析[J].土木工程学报,2007,40(7):30-36.
[6]陈昌宏,单建,马乐为,等.钢筋混凝土异形柱框架节点抗震性能试验[J].工业建筑,2007,37(2):6-10.
[7]张学辉,李其廉.高轴力下钢筋混凝土异形柱节点受力性能研究[J].河北科技大学学报,2010,31(5):472-478.
[8]王滋军,刘伟庆,蒋永生,等.中高层钢筋混凝土异形柱框架结构试验与理论研究[J].地震工程与工程振动,2002,22(5):62-65.
[9]中华人民共和国建设部.JGJ 149-2006混凝土异形柱结构技术规程[S].北京:中国建筑工业出版社,2006.
[10]郭棣,吴敏哲,艾兵.T形截面柱框架的抗震性能分析[J].西安建筑科技大学学报,2003,35(3):205-207.
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