考虑迭代相关及相位谱的人工地震波反应谱拟合  

Response spectra-compatible artificial ground motion simulation considering iterative correlation and phase spectra

作　　者：谢皓宇 郑万山[2] 仉文岗 高文军[2] Xie Haoyu;Zheng Wanshan;Zhang Wengang;Gao Wenjun(School of Civil Engineering,Chongqing University,Chongqing 400045,China;CMCT Research&Design Institute Co.Ltd,Chongqing 400060,China)

机构地区：[1]重庆大学土木工程学院,中国重庆400045 [2]招商局重庆交通科研设计院有限公司,中国重庆400060

出　　处：《地震学报》2020年第3期341-348,I0002,共9页Acta Seismologica Sinica

基　　金：国家重点研发计划(2017YFC0806009)资助。

摘　　要：针对传统频域法拟合人工地震波过程中迭代效率低下的问题,本文提出使用考虑迭代相关的拟合方法与考虑相位谱的拟合方法相结合的综合方法,分别以《公路桥梁抗震设计规范》中的设计谱和核电厂设备抗震需求谱为拟合对象,对比了改进的综合方法与传统方法的优劣。结果显示:改进的综合方法对于目标设计谱的拟合精度较传统方法有明显提升,尤其是在反应谱的高频段和低频段;改进方法对于《公路桥梁抗震设计规范》中设计谱的拟合效果好于对核电厂设备抗震需求谱的拟合效果。The iterative process of conventional frequency-domain method for simulating artificial ground motions is inefficient. To solve this problem,this paper proposed a new method considering iterative correlation and phase spectrum to generate artificial ground motion,targeting at design response spectrum in Specifications for Seismic Design of Highway Bridges and representative response spectra for nuclear plant equipments,and then discussed the characteristics of conventional method and the improved method. The result shows that new method achieves a significant improvement in simulation precision,especially in high frequency and low frequency ranges. Meanwhile,the method has a better performance in highway bridge response spectrum simulation than nuclear plant representative response spectrum simulation.

关 键 词：人工地震波 反应谱 相位谱 迭代收敛 

分 类 号：P315.9[天文地球—地震学]