英文摘要 |
To incorporate the effects of soil-structure interaction(SSI) into the structural design, the most important issue is to quantify the effects of SSI for a soil-structure system. For design purpose, it is well recognized that the natural frequency and associated damping ratio are the key parameters for structural analysis. The natural frequency and associated damping ratio of the Equivalent Fixed-Base(EFB) model constructed can be calculated through explicit equations, and can represent the dynamic characteristics of the original soil-structure system. In this study, the EFB model of a multi-degree-of freedom(MDOF) structure considering the SSI effects is proposed with the concept of conventional modal analysis and used to evaluate the maximum seismic responses of MDOF structure and foundation system with response spectrum method. |