DEVELOPMENT OF A STATISTICAL STRONG-MOTION EVALUATION METHOD CONSIDERING REGIONAL VARIATION OF SOURCE AND PATH EFFECTS IN THE TOHOKU REGION, JAPAN
A ground motion prediction equation for strong motion spectra is empirically developed for the Tohoku region,Japan. Spectral inversion analyses of S-wave Fourier spectra and 5% damped response spectra of identical datasets are conducted. Based on the results of the spectral inversion, PGA, PGV and response spectrum are modeled as a function of moment magnitude, stress drop, distance with three types of Q, and Vs30. It is found that the variance of the source term is significantly decreased by adding stress drop as a parameter. This indicates that taking into account regional variations of source radiation strength is effective to reduce the uncertainty in strong motion evaluation.
spectral inversion ground motion prediction equation Tohoku region Japan
S. Ohno
Associate Professor, Disaster Control Research Center, Tohoku University, Sendai, Japan
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）