Dynamic analysis of prismatic structures embedded in infinite soil medium

Abstract

For dynamic interaction problems between embedded structure and infinite soil medium, a semi-analytical numerical solution based on finite strip concept is presented. The structure and soil are made compatible with each other at the contact surface. With this technique, the three-dimensional interaction problem is now reduced to a one-dimensional one. The present approach can automatically account for radiational damping and is thus superior to some conventional methods in which artificial absorbers are placed at some finite boundary. Numerical examples for the analyses of natural frequencies, mode shapes and dynamic response of circular, elliptical and square prismatic structures in infinite soil definitely confirmed the above conclusions.