Geomechanics and Engineering

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Reliability analysis of tunnels with consideration of the earthquakes extreme events

  • Azadi, Mohammad (Department of Civil Engineering, Qazvin Branch, Islamic Azad University) ;
  • Ghasemi, S. Hooman (Department of Civil Engineering, Qazvin Branch, Islamic Azad University) ;
  • Mohammadi, Mohammadreza (Department of Civil Engineering, Qazvin Branch, Islamic Azad University)
  • Received : 2019.04.17
  • Accepted : 2020.07.31
  • Published : 2020.09.10
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Abstract

Tunnels are one of the most important constructions in civil engineering. The damage to these structures caused enormous costs. Therefore, the safe and economic design of these structures has long been considered. However, both applied loads on the tunnels as well as the resistance of the structural members are naturally uncertain parameters, hence, the design of these structures requires considering the probabilistic approaches. This study aims to determine the load and resistant factors of lining tunnels concerning the earthquake extreme events limit state function. For this purpose, tunnels that have been designed according to the previous design codes (AASHTO Tunnel LRFD 2017) and using reliability analysis, the optimum reliability of these structures for different loading scenarios is determined. In this paper, the tunnel is considered circular. Finally, the proper load and resistance factors are calculated corresponding to the obtained target reliability. Based on the performed calibration earthquake extreme events limit state function, the result of this study can be recommended to AASHTO Tunnel LRFD 2017.

Keywords

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