دوره 15، شماره 4 - ( 8-1404 )
جلد 15 شماره 4 صفحات 677-643 |
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Arjmand M, Naderpour H, Kheyroddin A. SEISMIC FRAGILITY AND RESILIENCE ASSESSMENT OF OPTIMALLY RETROFITTED RC FRAMES WITH NONLINEAR VISCOUS DAMPERS UNDER PARK–ANG DAMAGE CONSTRAINTS. IJOCE 2025; 15 (4) :643-677
URL: http://ijoce.iust.ac.ir/article-1-659-fa.html
URL: http://ijoce.iust.ac.ir/article-1-659-fa.html
SEISMIC FRAGILITY AND RESILIENCE ASSESSMENT OF OPTIMALLY RETROFITTED RC FRAMES WITH NONLINEAR VISCOUS DAMPERS UNDER PARK–ANG DAMAGE CONSTRAINTS. عنوان نشریه. 1404; 15 (4) :643-677
چکیده: (739 مشاهده)
The seismic resilience of existing reinforced concrete (RC) buildings can be improved by optimizing both energy dissipation and post-earthquake recovery. This study proposes a practical framework for upgrading RC moment-resisting frames using nonlinear fluid viscous dampers (NFVDs). Two typical frames, a four-story and an eight-story structure, were modeled and analyzed in OpenSees. Nonlinear time-history analyses with seven earthquake records were carried out to estimate the Park–Ang damage index, while incremental dynamic analyses (IDA) with 22 far-field records from FEMA P695 were used to evaluate fragility and collapse performance. The NFVDs were represented through a velocity-dependent Maxwell model, and the optimal damper parameters and locations were determined through a cost-based single-objective optimization scheme under predefined damage limits. The results show that the optimized damper configurations effectively reduced structural damage and improved post-event functionality recovery under seismic hazard levels corresponding to 10% and 2% probabilities of exceedance in 50 years. Overall, the proposed approach provides an efficient and economical solution for improving the seismic performance and resilience of existing RC frame buildings.
نوع مطالعه: پژوهشي |
موضوع مقاله:
Optimal design
دریافت: 1404/8/13 | پذیرش: 1404/10/8 | انتشار: 1404/10/10
دریافت: 1404/8/13 | پذیرش: 1404/10/8 | انتشار: 1404/10/10
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