Performance of soil-structure systems at collapse level: ASCE 7-10 to ASCE 7-22 criteria
Performance of soil-structure systems at collapse level: ASCE 7-10 to ASCE 7-22 criteria
This paper examines the impact of soil-structure interaction on the collapse potential of structures and evaluates changes in the collapse margin ratio (CMR) when the design base shear is reduced according to ASCE 7 guidelines. The study considers a single degree of freedom (SDOF) structure with modified Ibarra Krawinkler deterioration model and characteristics of special moment resisting frames, considering both horizontal and rocking degrees of freedom in the soil. Incremental dynamic analyses are conducted to calculate CMR for three systems: fixed-base, flexible-base, and flexible-base with reduced design base shear based on ASCE 7-10, 7-16, and 7-22 criteria. The results indicate that soil-structure interaction enhances the performance of soil-structure systems at the collapse level, resulting in higher CMR values compared to fixed-base structures. The design base shear reduction recommended by ASCE 7-10 leads to non-conservative performance and lower CMR values, while ASCE 7-16 and 7-22 criteria, which consider the response modification factor, yield higher CMR values.
Ali Gharavi
10th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE2023)
4. Geotechnical earthquake engineering
https://doi.org/10.53243/NUMGE2023-418
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