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反应谱法和时程分析法是桥梁结构抗震计算中的两种基本方法。为了比较这两种方法对计算结果的差异,对某主桥结构进行了动力特性分析,应用反应谱法和时程法分别对主桥结构进行了P1和P2两阶段的地震响应分析和相应的强度验算,两种方法得出了不同的结论。由于反应谱法分析是基于线性系统的,而时程法作为精细的分析方法,适用于任何非线性系统,因此在两种方法结论有较大差异时,应以时程法结果作为最终的设计依据。
Response spectrum and time-history analysis are two basic methods in seismic calculation of bridge structures. In order to compare the differences between the two methods, the dynamic characteristics of a main bridge structure are analyzed. Response spectrum method and time-history method are used to analyze the seismic response of the main bridge structure in two stages of P1 and P2 and the corresponding Strength checking, two methods come to different conclusions. Because response spectrum analysis is based on linear systems, and time-history method as a fine analytical method, applicable to any nonlinear system, so when there is a big difference between the two methods, the time-scale results should be used as the final design in accordance with.