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Geomechanics and Engineering Volume 22, Number 5, September10 2020 , pages 433-439 DOI: https://doi.org/10.12989/gae.2020.22.5.433 |
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Reliability analysis of tunnels with consideration of the earthquakes extreme events |
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Mohammad Azadi, S. Hooman Ghasemi and Mohammadreza Mohammadi
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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. | ||
| Key Words | ||
| structural reliability; tunnel; load and resistance factor design (LRFD); code calibration; seismic design | ||
| Address | ||
| Mohammad Azadi and Mohammadreza Mohammadi: Department of Civil Engineering, Qazvin Branch, Islamic Azad University, Qazvin 1477893855, Iran S. Hooman Ghasemi: 1.) Department of Civil Engineering, Qazvin Branch, Islamic Azad University, Qazvin 1477893855, Iran 2.) Department of Civil and Environmental Engineering, Washington State University, U.S.A. | ||