Abstract:

This study aims to investigate the effects of the February 6, 2023 Kahramanmaraş Pazarcık (Mw=7.7) and Kahramanmaraş Elbistan (Mw=7.6) earthquakes on the affected building stock. For this purpose, Hatay, one of the most affected provinces by these earthquakes, was selected as the pilot province. Accordingly, a four-story reinforced concrete frame, where all seismic loads are carried by the frames, was considered to represent the buildings. The structural elements (columns and beams) forming the frame were designed in accordance with the 1968, 1975, 1998, and 2007 Earthquake Regulations, as well as the 1975, 1984, and 2000 reinforced concrete standards (TS500). Subsequently, numerical models of these frames were created. The designed buildings were defined at 11 different locations in Hatay province. The different locations selected in Hatay province were chosen in the same positions as the TADAS stations affiliated with AFAD to avoid the process of transferring recorded ground motions between locations. A total of 2×11 records (East-West and North-South Horizontal Components) obtained from accelerometers were individually applied, while the recorded vertical accelerations were considered in the numerical analyses. Nonlinear time history analyses were performed considering the 11 different positions and directions for each building type. Within the scope of this study, seismic performances were obtained for a total of 88 different building designs and earthquake scenarios. The results indicate that medium-rise reinforced concrete frame buildings designed in accordance with the design and earthquake regulations used in the past years in our country are inadequate in terms of seismic resistance during earthquakes centered in Kahramanmaraş and the collapse cannot be prevented.

Keywords: