Effect of vertical seismic coefficient on cohesive-frictional soil slope under generalised seismic conditions

Pragyan Pradatta Sahoo; Sanjay Kumar Shukla

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Effect of vertical seismic coefficient on cohesive-frictional soil slope under generalised seismic conditions

机译：垂直地震系数对广义地震条件下粘性摩擦土坡的影响

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In the present work, seismic performance parameters have been reviewed by considering the possible combined action of vertical and horizontal seismic loadings of the ground motion during the earthquakes. Analytical expressions of factor of safety, yield seismic coefficient and permanent seismic displacement of a cohesive-frictional soil slope have been developed by following deterministic sliding block approach in a two-dimensional pseudo-static framework. The slope with a planar failure surface is assumed to follow the Mohr-Coulomb criterion by considering a slice of unit thickness through the slope. For a given range of slope geometrical and soil parameters, the role of vertical seismic coefficient has been analysed in the presence of cohesion to investigate its effect on factor of safety, yield seismic coefficient, and consequently on the permanent seismic displacement of the slope through a set of graphical presentations. The results show that avoidance of vertical seismic component of the ground motion in the stability analysis may lead to severe slope failures. The general expressions proposed herein can be used to carry out a quantitative stability assessment of cohesive- frictional soil slopes during earthquakes in real-life projects.

机译：在本作工作中，通过考虑地震期间地面运动的垂直和水平地震载荷的可能组合作用来审查地震性能参数。通过在二维伪静态框架中的确定性滑块方法之后，通过了在二维伪静态框架中的确定性滑块方法开发了一种安全性因子的安全性，产量地震系数和永久地震位移。假设具有平面故障表面的斜率通过考虑通过斜率的一片单位厚度来遵循MoHR-Coulomb标准。对于给定范围的坡度几何和土壤参数，在凝聚力存在下已经分析了垂直地震系数的作用，以研究其对安全性因子的影响，产生地震系数，因此通过A通过A的永久地震位移一套图形演示文稿。结果表明，避免在稳定性分析中的地面运动的垂直地震成分可能导致严重的斜率故障。本文提出的一般表达可用于在现实项目中地震过程中进行粘性摩擦土坡的定量稳定性评估。

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来源
《International journal of geotechnical engineering》 |2021年第3期|107-119|共13页
作者
Pragyan Pradatta Sahoo; Sanjay Kumar Shukla;
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作者单位

Discipline of Civil and Environmental Engineering School of Engineering Edith Cowan University Joondalup Perth Australia;

Discipline of Civil and Environmental Engineering School of Engineering Edith Cowan University Joondalup Perth Australia Department of Civil and Environmental Engineering Fiji National University Suva Fiji Department of Civil and Environmental Engineering V.R. Siddhartha Engineering College Vijayawada India;

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正文语种 eng
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Factor of safety; horizontal and vertical seismic coefficients; sliding block displacement; yield seismic coefficient;

机译：安全因素;水平和垂直地震系数;滑块位移;产生地震系数;

Effect of vertical seismic coefficient on cohesive-frictional soil slope under generalised seismic conditions

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