基于滑移线场理论的地震作用下土质边坡稳定性分析

发布时间：2018-04-17 22:42

本文选题：土质边坡 + 稳定性　；参考：《岩土力学》2017年06期

【摘要】：在土质边坡稳定性分析中,滑裂面的确定至关重要,而当前普遍采用的圆弧滑动面法会产生较大误差。采用滑移线场理论确定滑裂面,并结合动力有限单元法,提出了一种地震作用下土质边坡稳定性的分析方法。首先求出地震作用下土坡的应力场,运用滑移线场法搜索得到不同时刻土坡的临界滑移线,然后再根据临界滑移线上的应力分布求出对应于该滑移线的安全系数,以最小平均安全系数作为评价指标,实现地震作用下土质边坡的稳定性分析,最后结合工程实例,求得不同时刻的土坡临界滑移线及其对应的安全系数,并对该土坡的动力抗震稳定性进行了评价。分析表明:安全系数小于1.2的滑移线共同构成了地震作用下土坡的剪切带,与土坡的塑性区吻合,验证了文中分析方法的合理性。
[Abstract]:In the slope stability analysis, determination of the slip surface is crucial, and the circular slip surface method of the larger error will be produced. The slip surface determined by using the slip line field theory, combined with the dynamic finite element method, the slope stability analysis method under earthquake. We first find out the earthquake the soil under the stress field, searching the critical slip line at different slope using slip line field method, and then according to the critical slip line stress distribution and safety coefficient corresponding to the slip line, with a minimum of Ping Junan coefficient as the evaluation indexes, the stability analysis of soil slope under earthquake, finally the engineering example, obtains the safety coefficient of different time slope critical slip line and its corresponding, and the dynamic stability of the seismic slope was evaluated. The analysis shows that the safety factor The slip lines less than 1.2 together constitute the shear zone of the soil slope under the earthquake action, which coincides with the plastic zone of the soil slope, which verifies the rationality of the analysis method in this paper.

【作者单位】：华中科技大学土木工程与力学学院;
【基金】：国家自然科学基金项目(No.51278217)~~
【分类号】：P315.9;TU43

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