摘要
时程分析法作为目前结构地震响应分析中最为精准的方法,其准确性在很大程度上依赖于地震波的选取。然而,目前可用的地震记录较少,此时人工合成地震动不失为一个合理的选择。人工地震波的合成有一个基本的要求:模拟结果能与目标反应谱符合得较好,这就要求对地震动的功率谱、傅立叶谱以及反应谱等有较清楚的认识。本文详细地阐述了地震动模拟中涉及到的反应谱、功率谱和傅立叶谱的概念以及三者之间的关系,并初步讨论了目前地震动模拟中存在的一些缺陷,展望了未来地震动模型的发展方向。
The time history analysis method is recognized as the most accurate method in the structure＇s seismic response analysis,and its accuracy,to a great extent,determined by the selection of seismic wave.Because of the real seismic record is not enough,so that the numerical simulation of the earthquake acceleration time histories is a substitute.A basic require of the artificial earthquake wave that the numerical simulation result can match with the target response spectrum,and then the earthquake response spectrum,power spectrum and Fourier spectrum should be clearly recognized.Therefore,the relation between the earthquake response spectrum,power spectrum and Fourier spectrum is discussed,and some prospect is proposed in the numerical simulation of seismic wave.
出处
《四川建筑科学研究》
北大核心
2011年第2期171-179,共9页
Sichuan Building Science
基金
重庆市自然科学基金资助项目(CSTC
2008BB6171)
关键词
地震反应谱
功率谱
傅立叶谱
地震波数值模拟
earthquake response spectrum
power spectrum
Fourier spectrum
numerical simulation of seismic wave
