Placement of shallow foundations near or adjacent to slopes reduces their seismic and static bearing capacities. In this paper, the seismic behavior of shallow foundations adjacent to sandy slopes has been studied using a two-dimensional finite element method. Most of the previous studies have focused on upper bound solutions in limit state analysis framework via pseudo-static loading, and the effects of actual seismic loading such as loading frequency effects, acceleration amplitude above 0.30 g, non-linear dynamic analysis, and so on are ignored. The shallow foundations are located at a certain distance from the slope crest (i.e., d = 0.5b, 1.5b and 2.0b). The slope inclination angle studied in this paper is 25° (1 V: 2 H). The analyzed slope is composed of medium dense sand. The two elastic–perfectly plastic Mohr–Coulomb (MC) and hardening soil (HSM) constitutive models have been considered to investigate the effect of plastic behavior of the sandy soil. Innovatively, the actual seismic behavior of the slope, shallow foundation and the direction of the seismic responses have been studied. The results show that the structural and geotechnical responses of the HSM model are in most cases up to 30% larger and more conservative than the MC model responses. This shows the importance of using the HSM model in the study of seismic stability of slope and foundation.

在斜坡附近或附近放置浅基础会降低其抗震和静力承载能力。本文采用二维有限元方法研究了砂质边坡附近浅地基的抗震性能。以往的研究大多集中在通过拟静力加载的极限状态分析框架中的上限解，以及实际地震加载的影响，如加载频率效应、0.30 g以上加速度幅值、非线性动力分析等。被忽略。浅基础位于距坡顶一定距离处（即d = 0.5b、1.5b 和 2.0b)。本文研究的斜坡倾角为25°（1 V：2 H）。分析的斜坡由中密砂组成。两种弹性-完美塑性 Mohr-Coulomb (MC) 和硬化土 (HSM) 本构模型已被考虑用于研究沙土塑性行为的影响。创新地研究了边坡、浅地基的实际地震行为和地震反应方向。结果表明，在大多数情况下，HSM 模型的结构和岩土工程响应比 MC 模型响应大 30% 且更保守。这表明使用 HSM 模型在边坡和地基抗震稳定性研究中的重要性。