Active static and seismic earth pressure for c–φ soils
Active static and seismic earth pressure for c–φ soils
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DOI：
10.1016/j.sandf.2013.08.003
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发表时间：
2013-10
影响因子：
3.7
通讯作者：
Magued Iskander;Zhibo Chen;M. Omidvar;Ivan L. Guzman;O. Elsherif
中科院分区：
文献类型：
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作者：
Magued Iskander;Zhibo Chen;M. Omidvar;Ivan L. Guzman;O. Elsherif
将Rankine经典土压力解扩展到考虑墙倾斜和回填土坡度的刚性墙支撑c-φ回填土后的地震主动土压力。所提出的公式是基于朗肯的共轭应力的概念，没有采用任何额外的假设。所建立的表达式可用于c-φ回填土的静力和拟静力地震分析。结果表明，在相同的壁面摩擦角下，所提出的计算公式与Mononobe-Okabe法计算的无粘性土的结果是一致的。对于φ土壤，该公式产生的结果与可比较的情况下，可用的解决方案是可行的。设计图表计算净主动水平推力刚性墙后面的各种水平伪静态加速度，值的凝聚力，土壤内摩擦角，墙倾斜，和回填坡度组合。探讨了竖向拟静力加速度对主动土压力和拉裂缝深度的影响。最后，通过算例说明了该方法的应用.
Rankine classic earth pressure solution has been expanded to predict the seismic active earth pressure behind rigid walls supportingc–φbackfill considering both wall inclination and backfill slope. The proposed formulation is based on Rankine's conjugate stress concept, without employing any additional assumptions. The developed expressions can be used for the static and pseudo-static seismic analyses ofc–φbackfill. The results based on the proposed formulations are found to be identical to those computed with the Mononobe–Okabe method for cohesionless soils, provided the same wall friction angle is employed. Forc–φsoils, the formulation yields comparable results to available solutions for cases where a comparison is feasible. Design charts are presented for calculating the net active horizontal thrust behind a rigid wall for a variety of horizontal pseudo-static accelerations, values of cohesion, soil internal friction angles, wall inclinations, and backfill slope combinations. The effects of the vertical pseudo-static acceleration on the active earth pressure and the depth of tension cracks have also been explored. In addition, examples are provided to illustrate the application of the proposed method.