We investigate the influence of soil–structure interaction (SSI) and nonlinear soil behavior on the seismic fragility of reinforced concrete (RC) dual (frame + shear wall) buildings resting on shallow foundations. This article includes a holistic methodology to account for nonlinear soil behavior and soil–foundation–structure interaction in a modular way. Using nonlinear dynamic analyses, we derive fragility curves for a wide set of building typologies and soil profiles, showing that soil behavior during strong shaking significantly affects the vulnerability of the soil–foundation–structure system. The influence of SSI is pronounced mostly for soft soil profiles, varying in a building-specific way. Post-processing of our results evolves into a set of fragility modifiers that enable risk analysts to massively account for soil-related and/or SSI effects in large-scale risk assessments.

中文翻译：

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钢筋混凝土双结构建筑的脆性曲线修正，包括非线性场地效应和土-结构相互作用

我们研究了土壤-结构相互作用 (SSI) 和非线性土壤行为对浅层基础上钢筋混凝土 (RC) 双（框架 + 剪力墙）建筑物的地震脆性的影响。本文包括一种以模块化方式解释非线性土壤行为和土壤-地基-结构相互作用的整体方法。使用非线性动力分析，我们推导出一组广泛的建筑类型和土壤剖面的脆性曲线，表明强烈震动期间的土壤行为显着影响土壤-基础-结构系统的脆弱性。SSI 的影响主要针对软土剖面，以特定于建筑物的方式变化。