Evaluation of 2007 and 2018 Turkish Earthquake Code For the Provinces of Erzurum and Erzincan

Abstract

Turkey is located on seismically very active region. Therefore, very destructive earthquakes occurred in Turkey and around, and caused loss of life and property. After the 1939 Erzincan earthquake, one of the biggest earthquakes in the instrumental period, earthquake codes were started to be prepared and these codes were updated in certain periods. Finally, "Turkey Building Seismic Code" entered into force on 01.01.2019, the earthquake hazard maps updated and new approaches in parameters calculation have been introduced. The forces affecting structures during the earthquake can be determined by static and dynamic methods. However, in order to make the calculations more practical, the spectral analysis method, which is the static method, is widely used. This method is named as design spectrum in earthquake codes. In this study, the spectral acceleration values were obtained as defined in Turkish Seismic Code 2007 (TSC 2007) and Turkish Building Seismic Code 2018 (TBSC 2018) using different soil types for Erzurum and Erzincan provinces. The location where the design spectra will be calculated is located in the first (Erzincan) and second (Erzincan) earthquake zone according to the 1996 earthquake zones map. The acceleration spectra were calculated for an earthquake with a probability of exceeding 10% probability in 50 years for the planned structure (return period 475 years, Earthquake Ground Motion Level-2). The design spectra were prepared in graphical and tabular form and the difference between them was observed. One of the biggest differences of TBSC 2018 from the old code is the abolition of the concept of earthquake zone and the introduction of the concept of direct ground acceleration. Another difference is the change of soil groups. Since these parameters are closer to reality, the calculations made with TBSC 2018 are more reliable.

Keywords: Earthquake Hazard Map, Spectral Acceleration, TBSC 2018, TSC 2007

DOI: 10.7176/JSTR/5-12-07