对人造地震动反应谱求解及拟合的几个相关问题探讨  

Discussions on the response spectral solution and fitting of spectrum-compatible artificial seismic waves

作　　者：刘帅[1] 潘超 周志光[3] Liu Shuai;Pan Chao;Zhou Zhiguang(School of Civil Engineering and Architecture,Zhejiang Sci-Tech University,Hangzhou 310018,China;School of Civil Engineering,Yantai University,Shandong Yantai 264005,China;Research Institute of Structural Engineering and Disaster Reduction,Tongji University,Shanghai 200092,China)

机构地区：[1]浙江理工大学建筑工程学院,中国杭州310018 [2]烟台大学土木工程学院,中国山东烟台264005 [3]同济大学结构工程与防灾研究所,中国上海200092

出　　处：《地震学报》2018年第4期519-530,共12页Acta Seismologica Sinica

基　　金：国家自然科学基金(51778491);浙江省自然科学基金(LQ17E080014);山东省自然科学基金(ZR2018BEE033)联合资助

摘　　要：为更高效合理地生成与设计反应谱相符的人造地震动信号,本文基于自主开发的地震动信号处理软件EQSignal对人造地震动生成过程中涉及的几个问题进行了探讨,并通过对单自由度简谐共振体系的响应分析,提出了具体的解决建议:(1)反应谱求解时应该对高频段和低频段分别采用频域传递函数法和逐步积分法求解;(2)反应谱周期控制点的分布模式也应分段处理,短周期段宜采用对数平均分布,长周期段宜采用线性平均分布,反应谱总周期控制点不宜少于120个;(3)人造地震动反应谱与设计反应谱拟合的过程中,使用频域方法与时域方法相结合可兼顾效率与收敛性。In order to generate design-spectrum-compatible artificial seismic waves more efficiently and rationally,three problems that arise during the procedure of artificial seismic signals generation are studied and discussed in this paper by the aid of an earthquake signal processing software named EQSignal which is developed by the authors,and through the response analysis of harmonic resonance system with single degree of freedom,the corresponding suggestions to solve these questions are also provided. It is suggested that transfer function method should be adopted within the high-frequency segment of a response spectrum,and step-by-step integration method can be used within the low-frequency segment. There should be more than 120 period points in a seismic response spectrum,and the period points should be log-uniformly distributed at short-period segment and uniformly distri-buted at long-period segment. During seismic spectrum fitting,both the two iterative methods in frequency domain and time domain are recommended to use in order to give consideration to both efficiency and convergence.

关 键 词：人造地震动 反应谱 高频响应 谱拟合 地震信号处理 

分 类 号：P315.3[天文地球—地震学] TU352.1[天文地球—固体地球物理学]