Analyzing Liquefaction-Induced Lateral Spreads Using Strength Ratios
Analyzing Liquefaction-Induced Lateral Spreads Using Strength Ratios
复制标题
使用强度比分析液化引起的横向扩散
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
Cora I. Johnson
中科院分区：
文献类型：
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作者：
S. Olson;Cora I. Johnson
作者使用纽马克滑块方法，根据动员强度比su(Mob)/σvo‘，对39个有良好记录的液化引起的侧向扩散进行了反向分析。基于反分析结果，我们发现在横向扩展过程中动员的反算强度比可以与归一化圆锥贯入试验尖端阻力和标准贯入试验击数直接相关。值得注意的是，在这些横向扩展过程中，基于Newmark分析的强度比与从液化流动故障反算出的液化强度比基本一致。动员的强度比率似乎与横向位移的大小(至少对于大于15厘米的位移)和震动强度(就地面峰值加速度而言)无关。此外，根据这些情况反算出的动员强度比在给定的沉积环境下似乎是一致的，似乎不受潜在水L的严重影响。
The writers backanalyzed 39 well-documented liquefaction-induced lateral spreads in terms of a mobilized strength ratio, su (mob)∕ σ vo ′ using the Newmark sliding block method. Based on the inverse analyses results, we found that the backcalculated strength ratios mobilized during lateral spreads can be directly correlated to normalized cone penetration test tip resistance and standard penetration test blow count. Remarkably, Newmark analysis-based strength ratios mobilized during these lateral spreads essentially coincide with liquefied strength ratios backcalculated from liquefaction flow failures. The mobilized strength ratios appear to be independent of the magnitude of lateral displacement (at least for displacements greater than 15 cm ) and the strength of shaking (in terms of peak ground acceleration). Furthermore, the mobilized strength ratios backcalculated from these cases appear to be consistent for a given depositional environment and do not appear to be severely impacted by potential water l...