【摘要】 以一座斜拉桥为例,应用ANSYS程序建立了三种不同空间有限元模型:脊梁模型、三主梁模型和板壳模型。对三个模型分别进行了地震反应谱分析,通过结果对比,可以得到:单主梁模型可以用来模拟闭口箱梁;三主梁模型因为充分考虑了截面的翘曲扭转刚度,可以用来模拟翘曲刚度较大的开口箱梁截面,并具有比较高的精度;板壳模型建模比较繁琐,可以用做模拟板壳局部应力分析。更多还原

【Abstract】 Based on a cable-stayed bridge,three different special FE models are constructed by ANYS program,which are single-gird model,triple-gird model and shell model.After that,APDL Parametric Design Language that is offered by ANSYS program inputs the earthquake response spectrum to every FE model.Every model is impulsed by two rules seismic response spectrum come from vertical,transversal or horizontal direction in space.The mainly conclusion can be acquired through the seismic response calculation: the single-gird model can be used to model close-box section beam and the triple-gird model to model open-box section beam because of counting the warp torsion stiffness efficiently,which model own more precision than single-gird model;the shell model should be used model shell or thin wall structures.更多还原