反复荷载下组合梁-钢筋混凝土柱节点的有限元分析

THE NONLINEAR ANALYSIS OF SC BEAM AND CONCRETE COLUMN JOINTS UNDER THE REVERSED CYCLIC LOAD

应用非线性有限元法分析了组合梁的剪力连接度对组合梁-钢筋混凝土柱节点抗震性能的影响。利用ANSYS软件建立了端板高强螺栓连接的组合梁-混凝土柱框架节点的有限元模型,同时根据试验的情况对模型施加边界条件,根据实际加载的情况对模型施加荷载。根据ANSYS计算结果画出的各构件的骨架曲线,将之与试验结果进行了耗能、延性等方面的对比,结果表明两者之间规律一致,但存在一定的误差,导致误差主要是有限元分析计算时混凝土本构模型的选取差异,钢筋混凝土非线性有限元分析的准确性在很大程度上依赖于混凝土本构关系的合理性。

The finite element models of the endplate bolted SC beam and concrete column joints are set up,at the same time,under the situation of test boundary conditions and loads on the models.Under the ANSYS's results,the skeleton curves are deduced.And from the contrast between the test results and finite element results,it indicates the rules are the same.But the errors are occurred due to the difference of the constitutive relation.The precision of the nonlinear analysis of reinforced concrete is depending on the constitutive relation to a large extent.