Field relations among coseismic ground motion, water level change and liquefaction for the 1999 Chi‐Chi (Mw = 7.5) earthquake, Taiwan
Field relations among coseismic ground motion, water level change and liquefaction for the 1999 Chi‐Chi (Mw = 7.5) earthquake, Taiwan
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DOI：
10.1029/2003gl017601
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发表时间：
2003-09
影响因子：
5.2
通讯作者：
Chi‐yuen Wang;D. Dreger;Chung-Ho Wang;D. Mayeri;J. Berryman
中科院分区：
文献类型：
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作者：
Chi‐yuen Wang;D. Dreger;Chung-Ho Wang;D. Mayeri;J. Berryman
1999年台湾集集地震引起的同震地面运动、水位变化和液化之间发现了基于场的、流域范围的关系。的关系意味着阈值的4.4米/秒2和0.6米/秒的频谱加速度和速度在1赫兹，分别低于孔隙压力没有明显的变化，高于孔隙压力随加速度和速度的增加呈指数增加。当1-Hz频谱加速度和速度以及峰值地面加速度分别超过1.16 m/s2、1.2.4 m/s和1.2.5 m/s2（1.00000000 g）时，发生液化。目前和以前的结果之间的广泛一致性表明，该关系可以转移到其他地区，并可能提供基本的约束建模同震孔隙压力增加和液化。
Field‐based, basin‐wide relations are discovered among coseismic ground motion, water‐level change and liquefaction induced by the 1999 (Mw = 7.5) Chi‐Chi earthquake, Taiwan. The relations imply thresholds of 4.4 m/s2 and 0.6 m/s in the spectral acceleration and velocity at 1 Hz, respectively, below which pore pressure does not change appreciably and above which pore pressure increases exponentially with increasing acceleration and velocity. Liquefaction occurs when the 1‐Hz spectral acceleration and velocity and the peak ground acceleration exceed ∼16 m/s2, ∼2.4 m/s, and ∼2.5 m/s2 (∼0.26 g), respectively. Broad consistency between the present and previous results suggests that the relations may be transferable to other areas and may provide fundamental constraints for modeling coseismic pore‐pressure increase and liquefaction.