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考虑土与结构动力相互作用的影响,建立了铰链式护坡的非线性动力相互作用的有限元分析模型,对其进行了地震反应数值模拟,分析了在不同地震动作用下的应力、加速度和相对水平位移反应特性,结果表明:在相同强度和频谱的地震动作用下,护坡中上部和底部的最大动应力幅值较大,护坡顶部和底部的加速度和水平位移较大;在相同强度和不同频谱的地震动作用下,在Loma Prieta波作用下护坡的动力反应比Kobe波作用下护坡的动力反应大。从护坡的地震反应特性考虑,护坡顶部和底部是地震动作用下的薄弱区域,在抗震设计中应引起重视。另外,对于护坡的中上部也应引起相应的重视。
Considering the influence of soil-structure dynamic interaction, the finite element model of nonlinear dynamic interaction of hinge-type slope is set up, and the numerical simulation of seismic response is carried out. The stress, acceleration and relative velocity under different ground motions are analyzed. The results show that under the same earthquake intensity and frequency spectrum, the maximum dynamic stress amplitude in the upper and bottom of the slope is large, and the acceleration and horizontal displacement at the top and bottom of the slope are larger. Under the same intensity and different ground motions, The dynamical response of slope protection under Loma Prieta wave is larger than that of Kobe wave under the earthquake action of frequency spectrum. Considering the seismic response characteristics of the slope protection, the top and bottom of the slope are the weak areas under the action of the earthquake and should be paid attention to in the seismic design. In addition, the upper part of the slope should also cause the corresponding attention.