Inputting the near fault unidirectional and bidirectional velocity big pulse complex site response is calculated by equivalent linearization method the result is examined by itself . Rational condition and limitation of the traditional equivalent linearization method in this project are pointed out .

通过近断层 单向、双向速度大 脉冲输入的自检验分析，指出了工程中传统等效线性化方法的适用条件及局限性。

The result indicated that when seismic motion was unidirectional velocity pulse the parted diploid - mechanism was more reasonable than unitive diploid-mechanism . However the unitive diploid-mechanism is more suitable for the analysis of bidirectional velocity pulse action .

结果表明： 单向速度 脉冲地震动作用时，双机制分合法比双机制统一法更合理，双机制统一法更宜于分析双向速度脉冲作用。