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本文介绍串联多自由度体系在地震波作用下的地震反应分析。恢复力特性曲线分两种情况考虑：一种是双线型，另一种是三线型（考虑刚度退化）。给出按状态判定数ＰＤ值组织程序的逻辑结构与公式的方法。采用 Ｗｉｌｓｏｎ－θ法进行逐步积分计算。对实际结构震害进行了计算，并讨论了影响计算的一些因素。
This paper introduces the seismic response analysis of a series of multi-degree-of-freedom system under the action of seismic waves. The recovery force characteristic curve is considered in two cases: one is a double line type, and the other is a three line type (considering the stiffness degradation). A method of organizing the logical structure and formula of the program according to the PD value of the state judgement number is given. Wilson-θ method is used for step-by-step integration calculation. The actual structural damage was calculated and some factors affecting the calculation were discussed.