ABSTRACT

Due to soil -structure-interaction (SSI), the seismic lateral structural deformations may be substantially different from the ones traditionally calculated from the fixed-base structure on free-field approach. Additionally, the actual displacements of foundations considering soil compliance are of practical interest in some applications. In the present study, seismic elastic displacement demand of compliant coupled soil- structure (SFS) systems, is investigated through numerical time history analyses. The numerical displacement demand is validated through an analytical solution, comparison between FEM and analytical solution is provided and finally, a practical, simplified approach for displacement evaluation is proposed. The displacements are presented in terms of dimensionless parameters such as soil to structure stiffness ratio 1/σ and slenderness ratio h/B, while closed-form relationships are proposed.

摘要

由于土壤-结构-相互作用（SSI），地震横向结构变形可能与传统上根据自由场方法从固定基础结构计算的变形有很大不同。此外，考虑土壤柔顺性的基础实际位移在某些应用中具有实际意义。在本研究中，通过数值时程分析研究了柔顺耦合土结构（SFS）系统的地震弹性位移需求。通过解析解验证了数值位移需求，提供了有限元法与解析解的比较，最后提出了一种实用的、简化的位移评估方法。