【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。更多还原

【Abstract】 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.更多还原