Dynamic wave–soil–structure interaction analysis in the time domain

In recent papers [Zhang X, Wegner JL, Haddow, JB. Three dimensional soil–structure–wave interaction analysis in time domain. Earthq Eng Struct Dynam 1999;36:1501–24; Wegner, JL, Zhang X. Free vibration analysis of a three-dimensional soil–structure system. Earthq Eng Struct Dynam 2001;30:43–57], a new numerical procedure was developed and implemented into a three-dimensional dynamic soil–structure interaction analysis program (DSSIA-3D). In this novel procedure, a substructure method is used in which the unbounded soil is modeled by the scaled boundary finite-element method and the structure is modeled by a standard FEM. This results in an improvement over current methods. In this paper, we apply DSSIA-3D to obtain the dynamic response of tall buildings, with multi-level basements, subjected to realistic seismic excitations, including P-, SV-, and SH-waves, at various angles of incidence. Numerical results are obtained for the dynamic response of the soil–structure system, which depends upon frequency content, wave pattern and input angle of ground motion.