弹性与弹塑性动力时程分析方法中若干问题探讨

Discussion on linear and nonlinear time history analysis method

依据大量实际工程弹性、弹塑性动力时程分析经验,结合实际工程应用,探讨了弹性、弹塑性动力时程分析方法中的一些基本问题。针对性地分析了动力时程分析方法中地震波的离散性;地震波如何与反应谱曲线在统计意义上相符;人工模拟地震波方法及其工程应用;弹性、弹塑性时程分析法选取地震波的基本原则;弹性时程分析法地震波的选取数量;如何将反应谱分析结果与时程分析结果取较大值等方面的问题。通过大量的算例分析可以看出,正确地应用弹性、弹塑性动力时程分析方法需要从多个方面进行准确理解和把握,教条地应用很难发挥弹性、弹塑性动力时程分析应有的作用。

This paper discussed linear and nonlinear time history analysis method,especially concerning with the following issues: the disperse of earthquake wave,scaling the earthquake wave to fit the design response spectrum of China code,the earthquake wave simulation method,the basic principle of earthquake wave selection,the number of waves required in time history analysis,and the maximum structural response from spectrum analysis and time history analysis.As shown in many examples,linear and nonlinear time history analysis method should be used appropriately to obtain useful results.