Steel-encased concrete composite beam of U-section is a new type of composite beam,its rational design are needed for the construction of the joints connecting the beam with the columns. Based on the experiment two finite element models of different joints of the outer-plated steel-concrete composite beam and reinforced concrete column are set up. And boundary conditions and loads on the models are set under the situation of test. Under the results of ANSYS.tlie seismic behavior of shear-resistant capacity,hysteren'c loops and ductility are deduced. And from the contrast between the test results and the finite element results, it indicates that the finite element results agree well with the test and the model can correctly simulate the two joints.%U形外包钢—混凝土组合梁是一种新型组合梁,在负弯矩作用下具有良好的工作性能,其与柱连接节点的构造还有待合理设计.在试验的基础上,通过ANSYS软件建立了两个不同构造形式的外包钢—混凝土组合梁与钢筋混凝土柱节点的有限元模型,并根据试验的情况对模型施加边界条件与荷载.将ANSYS计算出的两个节点的承载力、滞回曲线、延性和耗能等抗震性能与试验结果进行对比.结果表明,两者吻合较好,但存在一定的误差.
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