Parametric analysis for a soil-structure interaction system with lateral-torsional coupling based on forced decoupling method

In order to study the effect of different parameters on the dynamic response of a soil-asymmetric structure system,a MATLAB program based on the analytic solution of interaction system's dynamic equation was developed here.Then,the influence of torsional to lateral frequency ratio Ω,eccentricity ratio B,height-to-width ratio λh and the foundation properties on the free vibration characteristic,elastic seismic response and the lateral-torsional coupling effect of the interaction system were thoroughly analyzed.It was concluded that the influence of such parameters on the lateral displacement transfer functions and torsional displacement transfer functions of the soil-asymmetric structures were different from the influencing laws of parameters on asymmetric structures on rigid foundation.