从支座移动时的结构静力平衡方程出发,根据地震动时程输入方式的不同和结构在支座移动随时间变化时的动力平衡方程,总结并推导了多点激励作用下结构地震反应时程分析的四种有限元模型,分析其理论基础和选择模型的原则。分析了一刚架结构在多点激励下的地震反应。 Based on the static equilibrium equation of the structure when the support is moved and according to the difference of the input method of the earthquake time-history and the dynamic balance equation of the structure when the support moves with time, the time-history of the structure seismic response under the multi-point excitation is derived and deduced. Analysis of the four finite element models, analysis of its theoretical basis and the principle of selection model. The seismic response of a rigid frame structure under multi-point excitation is analyzed.