The increasing necessity to solve complex problems in Structural Dynamics and Earthquake Engineering requires the development of new ideas, innovative methods and numerical tools for providing accurate numerical solutions in affordable computing times. This book presents the latest findings in Computational Dynamics, Stochastic Dynamics, Structural Dynamics and Earthquake Engineering. It contains selected and revised contributions from pronounced authors in the aforementioned fields. It will benefit readers involved with Structural Dynamics and Earthquake Engineering, and will realize that the one is getting acquainted with advanced computational methods and software tools for tackling complex problems in dynamic/seismic analysis and design. The contents was carefully selected based on the presentations held at the Conference of Computational Dynamics & Earthquake Engineering (COMPDYN), held in Retymno, Crete, from 13 to 16 June, 2007.