Geomechanics and Engineering

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Earthquake hazard and risk assessment of a typical Natural Gas Combined Cycle Power Plant (NGCCPP) control building

  • A. Can Zulfikar (Istanbul Technical University, Disaster Management Institute) ;
  • Seyhan Okuyan Akcan (Bogazici University, Civil Engineering Department) ;
  • Ali Yesilyurt (Istanbul Technical University, Disaster Management Institute) ;
  • Murat Eroz (Asset Management and Sustainability, EnerjiSA Uretim) ;
  • Tolga Cimili (Asset Management and Sustainability, EnerjiSA Uretim)
  • Received : 2022.11.12
  • Accepted : 2023.11.23
  • Published : 2023.12.25
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Abstract

North Anatolian Fault Zone is tectonically active with recent earthquakes (Mw7.6 1999-Kocaeli and Mw7.2 1999-Düzce earthquakes) and it passes through Marmara region, which is highly industrialized, densely populated and economically important part of Turkey. Many power plants, located in Marmara region, are exposed to high seismic hazard. In this study, open source OpenQuake software has been used for the probabilistic earthquake hazard analysis of Marmara region and risk assessment for the specified energy facility. The SHARE project seismic zonation model has been used in the analysis with the regional sources, NGA GMPEs and site model logic trees. The earthquake hazard results have been compared with the former and existing earthquake resistant design regulations in Turkey, TSC 2007 and TBSCD 2018. In the scope of the study, the seismic hazard assessment for a typical natural gas combined cycle power plant located in Marmara region has been achieved. The seismic risk assessment has been accomplished for a typical control building located in the power plant using obtained seismic hazard results. The structural and non-structural fragility functions and a consequence model have been used in the seismic risk assessment. Based on the seismic hazard level with a 2% probability of exceedance in 50 years, considered for especially these type of critical structures, the ratios of structural and non-structural loss to the total building cost were obtained as 8.8% and 45.7%, respectively. The results of the study enable the practical seismic risk assessment of the critical facility located on different regions.

Keywords

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