Modified pseudo-dynamic analysis of slope considering logarithmic spiral failure surface with numerical solution

IF 1.6 Q3 ENGINEERING, CIVIL Australian Journal of Civil Engineering Pub Date : 2021-10-27 DOI:10.1080/14488353.2021.1995131
S. Hazari, Sima Ghosh, Richi Prasad Sharma
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Abstract

ABSTRACT A methodology for the analysis of soil slope made up of c-ϕ soil using a modified pseudo-dynamic approach is tried to develop here. In this study, the slope is divided into a number of vertical slices and the failure surface of the slope is assumed to be logarithmic spiral. The suggested modified pseudo-dynamic approach satisfies the zero-stress boundary condition at the free ground surface and considers the damping properties of the materials. Results of the present analysis are presented in tabular form. The effects of the variation of different parameters like horizontal and vertical seismic acceleration, slope angle, soil friction angle, damping ratio, frequency ratio, cohesion and surcharge on the FOS are shown graphically. Consequently, required reinforcement strength is evaluated to ensure the safety of the slope under seismic loading conditions. The results obtained from the present method are compared with the results of the available literature and also a numerical validation of the model is given using PLAXIS 2D.
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考虑对数螺旋破坏面边坡的修正拟动力分析及数值解
摘要本文尝试开发一种使用改进的拟动力方法分析由c-?土组成的土质边坡的方法。在本研究中,将边坡划分为多个垂直切片,并假设边坡的破坏面为对数螺旋。所提出的修正拟动力方法满足自由地面的零应力边界条件,并考虑了材料的阻尼特性。本分析结果以表格形式呈现。图中显示了水平和垂直地震加速度、边坡角、土壤摩擦角、阻尼比、频率比、内聚力和超载等不同参数的变化对FOS的影响。因此,对所需的钢筋强度进行了评估,以确保边坡在地震荷载条件下的安全。将本方法获得的结果与现有文献的结果进行了比较,并使用PLAXIS 2D对模型进行了数值验证。
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CiteScore
3.90
自引率
7.70%
发文量
31
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