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为简化结构与土体之间接触面的相互作用,提出采用集中参数法进行分析,即在满足Mononobe-Okabe理论基本假设的前提下,给出了在有土体表面均布荷载作用下地震加速度沿挡土墙高度均匀与线性分布的地震动土压力非线性分布,类比水体附加质量原理,推导了基于给出的地震作用下非线性动土压力分布的附加质量计算公式,给出了土体附加刚度在集中参数中的模拟,并进行了算例验证。结果表明,采用集中参数法模拟在地震作用下土体对挡土结构的作用简便、有效、实用。
In order to simplify the interaction between structure and soil contact surface, a method of concentration parameter method is proposed, that is to say, under the premise of meeting the basic assumption of Mononobe-Okabe theory, the seismic acceleration Based on the non-linear distribution of earth pressure and the additional mass principle of analogous water body, the additional mass formula of nonlinear earth-moving pressure distribution under earthquake action is deduced. The additional stiffness of soil is given. Simulation in the centralized parameters, and a case study. The results show that using the centralized parameter method to simulate the effect of soil on retaining structure under earthquake is simple, effective and practical.