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Time-Dependent Seismic Fragility of RC Moment Frames in Corrosive Environment Considering Concrete Quality | ||
| Journal of Rehabilitation in Civil Engineering | ||
| مقاله 5، دوره 13، شماره 2 - شماره پیاپی 38، مرداد 2025، صفحه 75-93 اصل مقاله (1.17 M) | ||
| نوع مقاله: Regular Paper | ||
| شناسه دیجیتال (DOI): 10.22075/jrce.2024.32075.1915 | ||
| نویسندگان | ||
| Mohammad Amiri1؛ Amirhossein Jafray* 2؛ Ali Khoddam2؛ Mohsen Ali Shayanfar1؛ Sajad Zarei1 | ||
| 1School of Civil Engineering, Iran Univ. of Science and Technology, Tehran, Iran | ||
| 2Department of Civil and Geomatics Engineering, Arak University of Technology, Arak, Iran | ||
| تاریخ دریافت: 27 مهر 1402، تاریخ بازنگری: 19 خرداد 1403، تاریخ پذیرش: 25 مرداد 1403 | ||
| چکیده | ||
| Corrosion of steel reinforcement in concrete is a common problem for reinforced concrete buildings in coastal regions. It can have significant impacts on the seismic performance of these buildings. Corrosion in reinforced concrete members can cause problems such as concrete cover removal, longitudinal cracks in concrete, and reduction of the cross-sectional area of steel reinforcements. Moreover, corrosion causes changes in the stress-strain curves of reinforcement steel, reducing its resistance. This study investigates the impact of corrosion on the seismic performance of a four-story concrete frame. In this context, moment-curvature curves for structural elements are first obtained, considering the impacts of corrosion on steel reinforcements and concrete. These curves are then used to model the plastic hinges under corrosion conditions in a nonlinear static (pushover) analysis of corroded RC frames. The pushover curves are then utilized to investigate the impacts of corrosion on the ductility and seismic capacity of the frame. The results show that corrosion significantly impacts the ductility of Reinforced Concrete (RC) frames and can increase the probability of collapse. Fragility curves obtained by incremental dynamic analysis show that the probability of exceeding damage states for structures with higher values of water-to-cement ratio in a corrosion scenario with columns exposed on two sides is significantly higher. | ||
| کلیدواژهها | ||
| Steel reinforcement corrosion؛ Seismic performance؛ Nonlinear static analysis؛ Nonlinear dynamic analysis؛ Fragility curve | ||
| مراجع | ||
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