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前言地震作用下单自由度非线性体系的动力反应最近受人们所重视,其原因是:(1)可以估计阻尼与非弹性性质综合的影响及材料的非线性类型对非弹性反应的
INTRODUCTION The dynamic response of a single degree of freedom nonlinear system under seismic loading has recently received much attention due to the following reasons: (1) it is possible to estimate the effect of the combination of damping and inelastic properties and the non-linear response of the material to inelastic reactions