Document Type : Original Article

Authors

• Ghazaleh Kordloo ¹
• Mohammad Sadegh Shahidzadeh ²
• Mehdi Izadpanah ³
• Amin Mehrabi-Moghaddam ⁴

¹ Master's degree Department of Civil Engineering, Faculty of Engineering, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran

² Assistant Professor Department of Civil Engineering, Faculty of Engineering, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran

³ Assistant Professor Department of Civil Engineering, Kermanshah University of Technology, Kermanshah, Iran.

⁴ Master's degree Marun Dam, Power Plant, and Irrigation Networks Operation Company, Behbahan, Khuzestan, Iran

Abstract

Iran is situated in a highly seismic region, where destructive earthquakes periodically cause substantial damage to the built environment. Consequently, the development and implementation of seismic design codes for buildings are of paramount importance. Lessons learned from recent earthquakes, coupled with the observed limitations of existing codes in mitigating structural and non-structural damage, and the rapid advancement of earthquake and structural engineering, have compelled researchers and code developers to continuously review and revise seismic design provisions. In light of the revisions and updates implemented in Part 9 of the Iranian National Building Code, the need to assess the seismic performance of reinforced concrete buildings designed according to the latest code provisions has become increasingly apparent. Therefore, this study aims to evaluate and compare the seismic performance levels and seismic adequacy of reinforced concrete structures with intermediate ductility designed based on the previous and updated editions of Part 9 of the Iranian National Building Code. This study employs incremental dynamic analysis (IDA) combined with reliability theory to assess seismic performance. Reliability indices at the Life Safety (LS) and Collapse Prevention (CP) performance levels are calculated for twelve reinforced concrete structures with 4-, 7-, and 12-story configurations, designed as intermediate and special moment-resisting frames, and are used as the primary evaluation criteria. The findings demonstrate that, within the framework of reliability theory, structures designed according to the updated code edition exhibit enhanced seismic performance at both the LS and CP performance levels compared to those designed based on the earlier code provisions

Keywords

• Seismic performance evaluation
• Incremental dynamic analysis
• Reinforced concrete moment resisting frames
• INBC Part 9
• Structural reliability

Main Subjects

• structure