On Analysis of Liquefaction-Induced Displacement in a Caisson Quay Wall

Abstract eng:
A series of finite element analyses have been conducted to assess the capability of en open source finite element code in dynamic analysis of a caisson quay wall with liquefiable backfill and foundation soils. A typical quay wall of Rokko island that suffered large displacements and rotations during the 1995 Earthquake in Kobe was considered as a case study. The nonlinear fully-coupled finite element analyses led to the following observations. Earthquake-induced excess pore water pressures have caused significant stiffness degradation in the backfill and foundation soil. This is a likely cause of large lateral displacements and settlements of the caisson wall and the backfill soil. Vertical displacements of the wall and the backfill soil were under-predicted by the finite element simulations. However the numerical simulations produced correct displacement modes, and the order of magnitude of lateral displacement was also correctly simulated.

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