SEISMIC HAZARD IN BANGKOK DUE TO LONG-DISTANCE EARTHQUAKES
SEISMIC HAZARD IN BANGKOK DUE TO LONG-DISTANCE EARTHQUAKES
复制标题
长距离地震造成曼谷地震灾害
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
S. Ashford
中科院分区：
文献类型：
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作者：
P. Warnitchai;C. Sangarayakul;S. Ashford
对曼谷进行地震危险性评估。计算结果以50年内不同水平地震概率的预测峰值地面加速度和相应的弹性反应谱的形式给出。结果表明，曼谷，虽然位于一个遥远的距离，从地震源，仍然是在破坏性的地震地面运动的风险，类似于在墨西哥城在1985年米霍坎地震。风险主要由三个因素造成。首先，可能对曼谷的地震危险有重大贡献的几个区域性震源能够产生大地震。第二，该地区的地面运动的衰减率似乎是相当低的，以及代表北美中部和东部的衰减模型。第三，曼谷的硫化物沉积物具有将地震地面运动放大约3至4倍的能力。
A seismic hazard assessment of Bangkok is conducted. The results are presented in the form of predicted peak ground accelerations for various levels of probability of exceedance in a 50-year period and the corresponding elastic response spectra. The results indicate that Bangkok, though located at a remote distance from seismic sources, is still at risk of damaging earthquake ground motions similar to those found in Mexico City during the 1985 Michoacan earthquake. The risk is essentially caused by three factors. First, several regional seismic sources that may contribute significantly to the seismic hazard of Bangkok are capable of generating large earthquakes. Second, the attenuation rate of ground motions in this region appears to be rather low and well represented by attenuation models of Central and Eastern North America. Third, the surficial deposits in Bangkok have the ability to amplify earthquake ground motions about 3 to 4 times.