A Modified Procedure to Evaluate Earthquake-Induced Displacement of Slopes Containing a Weak Layer
A Modified Procedure to Evaluate Earthquake-Induced Displacement of Slopes Containing a Weak Layer
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DOI：
10.3208/sandf.50.413
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发表时间：
2010-06
影响因子：
3.7
通讯作者：
Jian-liang Deng;Y. Tsutsumi;H. Kameya;J. Koseki
中科院分区：
文献类型：
--
作者：
Jian-liang Deng;Y. Tsutsumi;H. Kameya;J. Koseki
为合理评价含软弱夹层边坡的地震位移，提出了基于Janbu法的边坡稳定性分析和基于Newmark滑块法的位移计算方法。在计算过程中，考虑了滑动面几何形状的不规则性和部分滑动面的软弱夹层产生的超孔压的影响。在按该方法进行的计算中，由于超孔压的影响，可以得到负的屈服地震系数，从而导致安全系数为1，而由于滑动面在经历大的位移后，滑动面一般变得平坦，所以残余位移可以变成一个有限的值。
A procedure based on the Janbu method for slope stability analysis and Newmark's sliding block method for displacement calculation is proposed to evaluate rationally the earthquake-induced displacement of slopes containing a weak layer. In the procedure, the effects of the irregular geometry of the sliding plane and generation of excess pore water pressure in the weak layer which forms partly the sliding plane are considered. In the computation following the proposed procedure, a negative yield seismic coefficient to induce a safety factor of unity can be obtained because of the effect of excess pore water pressure, while the residual displacement can become a finite value because the sliding plane becomes flatter in general after the slope undergoes a large displacement.