The Effects of Seismic Pore Water Pressure on Ground Surface Motion
The Effects of Seismic Pore Water Pressure on Ground Surface Motion
复制标题
地震孔隙水压力对地表运动的影响
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
M. Vucetic
中科院分区：
文献类型：
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作者：
George T. Zorapapel;M. Vucetic
研究了浅层饱和液化沉积物中地震孔隙水压力的逐渐累积和相关的刚度退化对地表运动的影响。分析了地表位移和加速度、加速度时程的傅里叶变换和层增益因子。该分析是基于在强震期间完全液化或形成相当大孔隙水压力的地点记录的地表和地下加速度和孔隙水压力。分析表明：(1)矿床内部地震孔隙水压力与地表运动密切相关；(2)相对较小的地震超孔隙水压力可导致地表运动主导期明显延长；(3)这些现象可能导致有限的地表最大加速度约为0.2g，最大地表位移显著增加。
The effects of the gradual buildup of seismic pore water pressures and associated degradation of stiffness on the ground surface motion are examined for shallow saturated liquefiable deposits. Ground surface displacements and accelerations, the Fourier Transforms of the acceleration-time histories and layer gain factors are analyzed. The analysis is based on the ground surface and sub-surface accelerations and pore water pressures recorded at sites that either fully liquefied or built up considerable pore water pressures during strong earthquakes. The analysis shows that: (i) the seismic pore water pressures within the deposit and the ground surface motion are intimately related, (ii) relatively small seismic excess pore water pressures can cause a considerable lengthening of the predominant period of the ground surface motion, and (iii) these phenomena may lead to a limited maximum ground surface acceleration of approximately 0.2g, and a considerable increase of maximum ground displacements.