Performance-Based Evaluation of Building With and Without Soil Flexibility

Performance-based evaluation of the building by nonlinear static pushover analysis considering the effects of the soil–structure interaction is the main objective of this study. Soil–structure interaction is idealized by Modified Winkler method and elastic half-space Continuum method. Comparison between fixed base and soil–structure interaction method with raft foundation subjected to pushover analysis is performed using the Standards ASCE 41-13 and ATC-40. In the present study of a ten storey building modeled in SAP 2000 V19.2 software as a three-dimensional frame with and without soil–structure interaction is subjected to Pushover analysis. Totally, nine models are modeled under seismic zone 5 for three types of soil (hard soil, medium soil, and soft soil). The performance point of the building is found using Capacity Spectrum Method. The behavior of the building in the form of hinges defines the state of damage in the structure. The results show that performance of the building is more critical when soil flexibility is taken into consideration.