【摘要】 由于盆地内外介质的阻抗差别及特殊的几何形状,盆地内部将出现显著的地震动放大效应.针对出平面线源作用下沉积盆地地震响应问题,利用谱元法研究了震源主频率、空间位置和沉积盆地形状等因素对沉积盆地地震响应的影响.数值分析表明:点源的频率和沉积形状对地表的响应影响较大;点源的不同位置对于边缘效应有一定影响.更多还原

【Abstract】 Due to the difference of the medium impedance between the internal and external of basin, and the special geometric shapes of basin, there is a remarkable ground motion amplification effect in the basin. In this thesis, the spectral element method has been used to study the effect of the seismic response of the sedimentary basin caused by different main frequency of anti-plane shear line sources, different point source location, and different sedimentary shapes. The result shows that the frequencies of point source and sedimentary shape have greater influences on the surface response. A different position of the point source for the edge effect has a certain influence.更多还原