Seismic Displacements in Slopes by Limit Analysis
Seismic Displacements in Slopes by Limit Analysis
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DOI：
10.1061/(asce)0733-9410(1984)110:7(860
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发表时间：
1984-07
期刊：
影响因子：
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通讯作者：
Cheng‐Jung Chang;Wai-Fah Chen;James T. P. Yao
中科院分区：
文献类型：
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作者：
Cheng‐Jung Chang;Wai-Fah Chen;James T. P. Yao
为了避免应力应变法计算逐渐破坏的复杂性和地震边坡稳定性分析中使用伪静力分析的不准确性，需要开发一种有效的方法，可以直接确定边坡的临界状态和地震对边坡稳定性的影响。目前的工作是在传统的伪静力分析框架内的一种尝试，以开发一个模型来评估边坡的临界状态和随后的地震位移响应。采用上边界伪静力极限分析方法确定边坡的临界状态、屈服加速度和破坏机制。基于计算的屈服加速度和临界破坏面，然后使用Newmark的分析程序来评估斜坡的土壤位移，这些斜坡受到给定的地震荷载。
TO avoid the complication in the calculation of progressive failure using the stress‐strain approach, and the inaccuracy of using the pseudo‐static analysis in seismic slope stability analysis, it is desirable to develop an effective method with which the critical state of the slope and the effects of earthquake on the slope stability can be determined directly. The present work is an attempt, within the framework of conventional pseudo‐static analysis, to develop a model for the evaluation of the critical state and the subsequent displacement response of slopes to earthquakes. The upper‐bound pseudo‐static limit analysis is applied for the determination of critical state of slopes, in this case, the yield acceleration and corresponding failure mechanism. Based on the calculated yield acceleration and the critical failure surface, Newmark's analytical procedure is then used to assess the soil displacements of slopes, which are subjected to a given earthquake load.