ESTIMATION OF LONG PERIOD GROUND MOTIONS BY USING SEMI-EMPIRICAL METHODS
In this paper a modified empirical Greens functions (EGF) method is suggested and used for ground motion simulation. The source parameters of asperity and rupture process are decided by the inhomogeneous fault. The synthesis of Tangshan earthquake in far field is used to study the influence of the location of single asperity.Brunes model is used for predicting the Fourier spectrum of single asperity. In order to discover the influence of the aperity parameters on the ground motion, the asperity is simulated in the different conditions, which include the area and the stress drop of the asperity. The simulation result shows that the stress drop and the asperity area play important role in the far field Fourier spectrum. However, the research results show that these source parameters have different influence on the Fourier spectrum at different frequencies.
Tangshan earthquake empirical Greens function asperity long-period ground motion stress drop on the asperity asperity area
LUO Qifeng WU Di
Professor, Shanghai Institute of Disaster Prevention and Relief, Tongji University, Shanghai. China Doctor, Research Institute of Structural Engineering and Disaster Reduction, Tongji University, Shan
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）