结构的水平地震作用效应中各振型组合方法的选择

采用振型分解反应谱法来计算和分析水平地震作用下结构的效应时，目前常采用大型通用有限元软件来进行，其中存在“各振型组合方法”的选择问题。对于这个问题，在抗震规范和一些资料中介绍了两种方法：平方和开方法、完整二次项组合法，即SRSS法和CQC法。本文主要根据现行抗震规范和作者进行工程分析的经验将两种方法的适用条件和选用原则进行探讨，以方便工程人员选用。

The choice of modal combination rule in horizontal earthquake effect of structure

At present,we often use the large general finite element software and choice response spectrum analysis method to analyse effect of structure in horizontal earthquake,but there existing a optional question of all modal combination rule.To the question,there introducing two methods in seismic criterion and some data: SRSS rule and CQC rule.The author bases on actual seismic criterion and own engineering experience to discuss selected Principle and applied condition of the two rules.These conclusion can be us...