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Seismic Assessment of Collapse Prevention Limit-State of RC Structures Using Numerical Integration Method

•   Mr. Amin Mehrabi Moghaddam ,  Maroon Occupancy Company of Behbahan ,   
•   Dr. Sasan Motaghed ,  Behbahan Khatam Alanbia University of Technology ,   
•   Dr. Azad Yazdani ,  University of Kurdistan ,   
•   Mr. Ahmadreza Mehrabi Moghaddam ,  Islamic Azad University of Behbahan ,   

Major Topic: Seismic Analysis And Design Of Concrete Structures|تحلیل و طراحی لرزه ای سازه های بتنی

Abstract

Iran, as a seismic prone area, has experienced numerous catastrophic earthquakes with tens of thousands of casualties. The primary goal of the seismic provisions in codes is to prevent the collapse. This study evaluates the performance of Iranian seismic code (standard No. 2800) provisions to achieve this objective. To this end, five intermediate moment-resisting reinforced concrete structures of 3, 5, 8, 10 and 15-storey (three-span) are designed in accordance with Iranian building design codes. Incremental Dynamic Analysis (IDA) and Demand and Capacity Factored Design (DCFD) based on numerical integration (NI) method are used to evaluate the performance of Collapse Prevention (CP) level of the structures. Results show that probabilistic demand (PD) of structures increases with height of the structures so that its value is larger than the capacity factored for 15-storey structure.

Keywords

Collapse Prevention (CP); Incremental Dynamic Analysis (IDA); Numerical Integration (NI); Demand and Capacity Factored Design (DCFD); Probabilistic Demand (PD)

• Collapse of structures is one of the main concerns in the existing and designed buildings which are existent in seismic zones.
• This study evaluates the performance of intermediate moment-resisting reinforced concrete structures that are designed according to Iranian seismic code (standard No. 2800) in order to meet the collapse.
• To this aim, five intermediate moment-resisting reinforced concrete structures of 3, 5, 8, 10 and 15-storey (three-span) are designed. IDA and DCFD method based on NI were used to evaluate the performance of CP level.
• Results show that probabilistic demand (PD) of structures increases with height of the structures so that its value is larger than the capacity factored for 15-storey structure.

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