RC structural damages observed after October 30, 2020, Seferihisar-IZMIR earthquake and analytical evaluation of existing sample RC buildings

Abstract

In Turkey, the Izmir earthquake with M-w = 6.9 moment magnitude with the epicenter of 17.26 km off the Seferihisar (Izmir) coast in the Aegean Sea occurred in October 30, 2020, at Turkish time 14.51. According to the acceleration records of Izmir earthquake, the recorded peak ground acceleration (PGA) was approximately 0.182 g, and 117 deaths occurred in this earthquake, while 1032 people were injured. In this study, the structural damages that occurred on the buildings due to the Izmir earthquake were examined and discussed in detail according to the current and former Turkish regulations. Moreover, a RC building constructed in 1998 and survived the earthquake without any permanent damage (a 5-story building designed as 3-story in the existing static project but added two more floors without any in situ strengthening) was subjected to pushover analysis, linear analyses considering regulations and nonlinear time-history pushover analysis according to the acceleration records of Izmir earthquake. The obtained structural results were compared and discussed according to the current and former regulations.