Structural Engineering and Mechanics

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Seismic response of nuclear containment structures due to recorded and simulated near-fault ground motions

  • Kurtulus Soyluk (Department of Civil Engineering, Faculty of Engineering, Gazi University) ;
  • Hamid Sadegh-Azar (Institute of Structural Analysis and Dynamics, Department of Civil Engineering, University of Kaiserslautern-Landau) ;
  • Dersu Yilmaz (Pohlcon GmbH)
  • Received : 2022.09.19
  • Accepted : 2023.07.16
  • Published : 2023.09.10
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Abstract

In this study, it is intended to perform nonlinear time-history analyses of nuclear power plant structures (NPP) under near-fault earthquakes showing directivity pulse and fling-step characteristics. Simulation procedures based on cycloidal pulse and far-fault ground motions are also used to simulate near-fault motions showing forward-directivity and fling-step characteristics and the structural responses are compared with those of the recorded near-fault ground motions. Because it is aimed to determine specifically the pulse type characteristics of near-fault ground motions on NPPs, all the ground motions are normalized to have a PGA of 0.3 g. Depending on the obtained results it can be underlined that although near-fault ground motion has the potential to cause damage mostly on structural systems having larger periods, it may also have noticeable effects on the responses of rigid structures, like NPP containment buildings. On the other hand, simulated near-fault motions can help us to get an insight into the near-fault mechanism as well as an approximate visualization of the structural responses under near-fault earthquakes.

Keywords

Acknowledgement

This research is supported by the Scientific and Technological Research Council of Turkey (TUBITAK), as part of the International Post-Doctoral Research Fellowship Program. Project Term: 2020/1. This support is greatly acknowledged.

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