| 3D simulation of near-fault strong ground motion： comparison between surface rupture fault and buried fault |
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| 引用本文： | 刘启方,袁一凡,金星.3D simulation of near-fault strong ground motion： comparison between surface rupture fault and buried fault[J].地震工程与工程振动(英文版),2007,6(4):337-344. |
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| 作者姓名： | 刘启方 袁一凡 金星 |
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| 摘 要： |
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| 关 键 词： | 表面破裂断层 地壳运动 3D模拟 地震学 |
| 收稿时间： | 4 July 2007 |
| 修稿时间： | 20 August 2007 |
3D simulation of near-fault strong ground motion: comparison between surface rupture fault and buried fault |
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| Liu?Qifang,Yuan?Yifan,Jin?Xing.3D simulation of near-fault strong ground motion: comparison between surface rupture fault and buried fault[J].Earthquake Engineering and Engineering Vibration,2007,6(4):337-344. |
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| Authors: | Liu Qifang Yuan Yifan Jin Xing |
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| Institution: | 1. Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China
2. Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China;Earthquake Administration of Fujian Province,Fuzhou 350003,China |
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| Abstract: | In this paper, near-fault strong ground motions caused by a surface rupture fault (SRF) and a buried fault (BF) are numerically
simulated and compared by using a time-space-decoupled, explicit finite element method combined with a multi-transmitting
formula (MTF) of an artificial boundary. Prior to the comparison, verification of the explicit element method and the MTF
is conducted. The comparison results show that the final dislocation of the SRF is larger than the BF for the same stress
drop on the fault plane. The maximum final dislocation occurs on the fault upper line for the SRF; however, for the BF, the
maximum final dislocation is located on the fault central part. Meanwhile, the PGA, PGV and PGD of long period ground motions
(≤1 Hz) generated by the SRF are much higher than those of the BF in the near-fault region. The peak value of the velocity
pulse generated by the SRF is also higher than the BF. Furthermore, it is found that in a very narrow region along the fault
trace, ground motions caused by the SRF are much higher than by the BF. These results may explain why SRFs almost always cause
heavy damage in near-fault regions compared to buried faults.
Supported by: National Natural Science Foundation of China Under Grant No. 50408003; National Scientific and Technical Supporting Programs
Funded by Ministry of Science & Technology of China Under Grant No. 2006BAC13B01 |
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| Keywords: | near fault surface rupture fault long period ground motion 3D simulation |
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