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Stability of waterfront retaining wall subjected to pseudo-static earthquake forces

机译：拟静力作用下滨水挡土墙的稳定性

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Waterfront retaining walls supporting dry backfill are subjected to hydrostatic pressure on upstream face and earth pressure on the downstream face. Under seismic conditions, if such a wall retains a submerged backfill, additional hydrodynamic pressures are generated. This paper pertains to a study in which the effect of earthquakes along with the hydrodynamic pressure including inertial forces on such a retaining wall is observed. The hydrodynamic pressure is calculated using Westergaard's approach, while the earth pressure is calculated using Mononobe-Okabe's pseudo-static analysis. It is observed that when the horizontal seismic acceleration coefficient is increased from 0 to 0.2, there is a 57% decrease in the factor of safety of the retaining wall in sliding mode. For investigating the effect of different parameters, a parametric study is also done. It is observed that if φ is increased from 30° to 35°, there is an increase in the factor of safety in the sliding mode by 20.4%. Similar observations were made for other parameters as well. Comparison of results obtained from the present approach with [Ebeling, R.M., Morrison Jr, E.E., 1992. The seismic design of waterfront retaining structures. US Army Technical Report ITL-92-11. Washington DC] reveal that the factor of safety for static condition (k_h = 0), calculated by both the approaches, is 1.60 while for an earthquake with k_h = 0.2, they differ by 22.5% due to the consideration of wall inertia in the present study.
机译：支撑干回填的滨水挡土墙在上游面承受静水压力，在下游面承受土压力。在地震条件下，如果这样的墙保留了淹没的回填，则会产生额外的流体动力压力。本文属于一项研究，在该研究中，观察了地震以及包括惯性力在内的流体动力压力在这种挡土墙上的影响。流体压力是使用Westergaard方法计算的，而土压力是使用Mononobe-Okabe的拟静力分析计算的。可以看出，当水平地震加速度系数从0增加到0.2时，挡墙在滑动模式下的安全系数降低了57％。为了研究不同参数的影响，还进行了参数研究。观察到，如果将φ从30°增加到35°，则在滑动模式下的安全系数增加了20.4％。对于其他参数也进行了类似的观察。从本方法获得的结果与[Ebeling，R.M.，Morrison Jr，E.E.，1992.滨水挡土结构的抗震设计。美国陆军技术报告ITL-92-11。华盛顿特区]揭示，通过两种方法计算得出的静态条件（k_h = 0）的安全系数为1.60，而对于k_h = 0.2的地震，由于目前考虑了墙惯性，安全系数相差22.5％。研究。

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