非弹性反应谱计算的一个改进算法

本文就非弹性地震反应谱的计算问题（运动方程的形式，谱参量的选取，方程解算中恢复力模型上拐折点的处理和时间积分方法），给出了几点理论考虑，介绍了一个改进的算法。这一算法具有精度好和效率高的优点，这对做好结构抗震设计和其它地震工程问题中需要处理大量强震动数据的分析研究工作是有利的。文中还就双线型恢复力模型具体计算了2个例子（一个为屈服强化情形，另一个为理想弹塑性情形）。最后联系计算工作和计算结果，对非弹性反应谱计算中的其它有关事项做了补充讨论和说明。

An improved algorithm for the calculation of inelastic response spectra

The computational accuracy and efficiency of inelastic response spectra are important for the design of structures to resist earthquakes and the research which needs to process a large number of strong motion data in other earthquake engineering problems.In this paper,some problems of calculating the inelastic response spectrum are discussed(the form of equation of motion,the selection of spectrum parameters,the method for dealing with the critical points on restoring force models and the technique for time integration in solution of the equation of motion).The theoretical considerations relative to these problems are presented,and an improved algorithm is introduced.Next,two numerical examples are fulfilled.One is a hardening bilinear system,and the other belongs to the ideal elasto-plastic type.Finally,linked with the calculating work and the calculated results,some complementary discussions and comments on other related matters of calculating inelastic response spectra are given.