Response Reduction Factor for Structures with Significant Irregularities on Different Soil Stratum
Publish place: Civil Engineering Journal، Vol: 10، Issue: 3
Publish Year: 1403
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_CEJ-10-3_007
تاریخ نمایه سازی: 2 اردیبهشت 1403
Abstract:
The ability of a structure to dissipate energy through inelastic behavior is reflected in the response reduction factor (R), which is influenced by redundancy, ductility, and overstrength. Accurate determination of R is crucial for seismic design. This study focuses on determining the response factor for reinforced concrete (RC) structures with various irregularities. Non-linear static pushover analysis using SAP۲۰۰۰ was employed for numerical simulations to assess the impact of soil-structure interaction (SSI). The analysis included elevational and in-plan irregularities, revealing that buildings with irregular vertical geometries have lower inelastic seismic capacities compared to regular buildings. Consequently, R should be reduced by ۱۵–۴۰% from the ECP ۲۰۲۰ standard before the design phase for such structures. Irregularity was found to have a significant impact on weak soil conditions (C), leading to a reduction in R of ۲۰.۳% and ۱۳.۱% for fixed and isolated supports, respectively, on loose soil. Additionally, stiffer base soils were associated with higher R values for the same structure. Doi: ۱۰.۲۸۹۹۱/CEJ-۲۰۲۴-۰۱۰-۰۳-۰۷ Full Text: PDF
Keywords:
Irregular RC Buildings , Elevation Irregularity , Plan Irregularity , Nonlinear Static Pushover Analysis , Response Reduction Factor , Soil Structure Interaction.
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