Performance Evaluation and Comparison of Schools with Masonry System Treated by Braces, FRP Strips and Friction Dampers Using Fragility Curves (Case Study: Khorram Abad)

International Journal of Advanced Structural Engineering

دوره 13، شماره 3، آذر 2023   

نوع مقاله: Original Article

شناسه دیجیتال (DOI): 10.30495/ijase.2023.1992357.1075

نویسندگان

Saeed BahariPour^{* 1}؛ Mahdi Nani²؛ Mojtaba Hosseini³؛ Abdolreza arvghad Moghadam⁴؛ Mehran Mehran S. Razzaghi⁵

¹Islamic Azad University of South Tehran Branch ,Tehran, Iran

²Assistant Professor, Engineering Department, Islamic Azad University of South Tehran, Tehran, Iran

³Associate professor, Department of Civil Engineering, Lorestan Unoversity, KhoramAbad, Iran

⁴Associate professor, Research Center, International Institute of Earthquake, Tehran, Iran

⁵Assistant Professor, Engineering Department, university of Qazvin, Qazvin, Iran

چکیده

Due to the importance of seismicity in the region of Iran, the improvement and retrofitting of structures has always been the focus of competent employers and engineers. In order to achieve the goals of this research, a three-story concrete school structure in need of improvement has been selected. Then, the investigation of possible improvement options (three improvement options: 1 with braces, 2 with friction damper, 3 using FRP in the columns) has been done in Opensees software. In the following, incremental nonlinear dynamic modeling and analysis under selected earthquake records using the recommended FEMA P695 accelerometers for co-based seismic records (5 acceleration maps for the far field and 5 acceleration maps for the near field) has been performed. Then a comparison between the fragility curves for different states has been made. In this research, the behavior of the building against different earthquake intensities is shown According to the results obtained from other non-linear analyses, it can be seen that the maximum capacity obtained is in good agreement with the results of these analyzes and this method is very suitable for evaluating the behavior of buildings and ultimate capacities against earthquakes. Also, it can be a good alternative method for approximate methods such as pushover analysis to determine the performance level of the building and to determine the behavior of the building.

کلیدواژه‌ها

Fragility Curves؛ Concrete Structure؛ FRP Strips؛ Frication Dampers؛ Seismic Rehabilitation