A NUMERICAL SIMULATION OF WAVE PROPAGATION FOR COMPLEX FOUNDATIONS
Zhang Chuhan Zhao Chongbin(Tsinghua University)
Starting from two-dimensional wave equations and making use of Galerkin weighted residual approximations, discretized finite element formulations for wave problems of visco-elastic foundation have been derived. In considerations of geometrical and mechanical characteristics of semi-infinite foundation, a kind of superparametric and dynamic infinite element was also presented. Finally, by coupling the infinite elements with ordinary finite elements the system was used for simulation of propagating waves in a semi-infinite domain. This model is not only suitable for simulating complicated variations of geometrical and medium conditions, but also for describing the unbounded behavior of arbitrary multiple layers。 Examples given indicate that the model has excellent computational accuracy and feasibility of analysing the effects on foundation response due to the existence of faults or any other soft layers.