Characteristics of Ground Velocity and Acceleration Motions Related to Basin Structure
Characteristics of Ground Velocity and Acceleration Motions Related to Basin Structure
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DOI：
10.1002/cjg2.759
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发表时间：
2005-09
期刊：
影响因子：
--
通讯作者：
Zhiwei Zhao;Jiren Xu
中科院分区：
文献类型：
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作者：
Zhiwei Zhao;Jiren Xu
In present analysis, seismic wave propagation and amplitude distributions related to basin structure and alluvial fan in the heterogeneous medium are digitally simulated by using the pseudospectral method with a staggered grid RFFT differentiation. The results show that the seismic energy from bedrock region transmitting into sediments in the basin may not penetrate the bottom of basin to come back into the bedrock region. The seismic wave oscillating up-down within the basin may result in large damages for buildings above the basin structure It is a notable characteristic for the aseismic research and engineering. Interferences due to the secondary surface wave from the bedrock to sedimentary basin and the upward body wave probably result in peak ground accelerations and the peak collapse ratio of buildings away from the earthquake fault. Analyses of the interference process show that seismic velocity structure and geologic structure strongly influence the distribution of the maximum amplitudes of acceleration and velocity waveforms.
