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Estimation of inelastic displacement ratios for soil-structure systems with embedded foundation considering kinematic and inertial interaction effects

机译：考虑运动学和惯性相互作用的地基嵌入式结构非弹性位移比的估算

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In this research, the simultaneous effects of soil-structure interaction (SSI) and nonlinear behavior of the superstructure on inelastic displacement ratios of soil-structure systems with embedded foundation are parametrically investigated. Results involving both kinematic interaction (KI), including rocking foundation input motion (RFIM), and inertial interaction effects are considered and discussed. The effect of KI on the inelastic displacement ratios is investigated with special focus on the role of rocking foundation input motion. The soil structure system is modeled by sub-structure method. The foundation is modeled as a rigid cylinder embedded in the soil with different embedment ratios. A large number of soil-structure systems with embedded foundation having various dynamics characteristics and SSI key interacting parameters have been analyzed under an ensemble of 19 earthquake ground motions recorded on alluvium deposits. Results reveal that using the inelastic displacement ratios of fixed-base systems leads to an underestimation of the peak inelastic demands for soil structure systems. The phenomenon is less intensified as foundation embedment increases. Moreover, the effects of rocking foundation input motion due to KI on inelastic displacement demands are significant for deeply embedded foundation when the SSI effect is predominant. For practical purpose, a simplified expression for estimating inelastic displacement ratios of soil-structure systems with embedded foundation considering KI effects is proposed.
机译：本文研究了土-结构相互作用（SSI）和上部结构的非线性行为同时对具有嵌入式基础的土-结构系统的非弹性位移比的影响。考虑并讨论了涉及运动学相互作用（KI）（包括摇摆基础输入运动（RFIM））和惯性相互作用效应的结果。研究了KI对非弹性位移比的影响，并特别关注了摇摆基础输入运动的作用。用子结构方法对土壤结构系统进行建模。地基被建模为以不同的嵌入率嵌入到土壤中的刚性圆柱体。在冲积沉积物上记录的19次地震地面运动的综合作用下，已经分析了许多具有各种动力学特性和SSI关键相互作用参数的具有嵌入式基础的土壤结构系统。结果表明，使用固定基础系统的非弹性位移比会导致低估了土壤结构系统的峰值非弹性需求。随着基础嵌入的增加，这种现象的加剧程度降低。此外，当SSI效应为主导时，KI引起的摇摆基础输入运动对非弹性位移需求的影响对于深埋基础非常重要。出于实用目的，提出了一种考虑KI效应的具有嵌入式基础的土-结构体系非弹性位移比的简化表达式。

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