前言在地震分析中,结构工程师迄今普遍采用平方和平方根法(即 SRSS 法)求振型组合的最大值。对大多数二维分析,SRSS 法与时程法反应计算相比尚可求得满意的结果。基于早期在二维分析中运用 SRSS 法取得了成效,因此现在就原封不动地把 SRSS法用于三维结构的动力分析。事实上 SRSS法是目前一般三维体系动力分析中大多数计算机程序的一个主要组成部分。 Introduction In seismic analysis, structural engineers have so far generally adopted the square root method (ie, the SRSS method) to find the maximum value of the oscillating combination. For most of the two-dimensional analysis, the SRSS method can still obtain satisfactory results compared with the time-history method response calculation. Based on the early results of using the SRSS method in two-dimensional analysis, the SRSS method is now used for the dynamic analysis of three-dimensional structures. In fact, the SRSS method is a major component of most computer programs in the current dynamic analysis of three-dimensional systems.