Abstract
The dynamic response of a pair of rigid retaining walls experiencing base rotation due to horizontal harmonic ground shaking is studied analytically under conditions of plane strain. The retained material is idealized as a uniform, fully saturated poroelastic (with or without hysteretic damping) layer of soil of constant thickness obeying Biot’s dynamic poroelastic theory. In the analysis, emphasis is given to the calculation of the wall rotation angle. Parametric and comparison studies are conducted in order to assess the effect of various parameters, such as the rotational flexibility of the wall constraint, the properties of the retained medium and the distance between the walls, on the response. It is shown that, for a system experiencing base rotation, the resulted wall forces are much lower than those obtained for fixed-based rigid walls.
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