TY - GEN
T1 - Time-dependent structural reliability analysis of shield tunnels in coastal regions
AU - He, Z.
AU - Akiyama, Mitsuyoshi
AU - He, C.
AU - Frangopol, D. M.
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Deterioration of RC structures due to chloride-induced reinforcement corrosion is a common problem in an aggressive environment. Especially for shield tunnels in coastal regions, structures undergo a complex and rapid deteriorating process under the coupling effects of multiple mechanical and environmental stressors during their life-cycle, such as high hydrostatic pressure and aggressive agents. The very few existing studies on the deterioration processes of shield tunnels, especially considering the coupling effects, were not generally oriented to accurately assess the lifetime structural performance of these tunnels. In this paper, the chloride transport process in segmental linings with the impact of hydrostatic pressure is illustrated, two transport approaches of chloride are suggested, and the time to corrosion initiation is predicted. Finally, a Monte Carlo Simulation is used in conjunction with a time-dependent failure probability estimation associated with the deteriorated structural performance due to the steel corrosion.
AB - Deterioration of RC structures due to chloride-induced reinforcement corrosion is a common problem in an aggressive environment. Especially for shield tunnels in coastal regions, structures undergo a complex and rapid deteriorating process under the coupling effects of multiple mechanical and environmental stressors during their life-cycle, such as high hydrostatic pressure and aggressive agents. The very few existing studies on the deterioration processes of shield tunnels, especially considering the coupling effects, were not generally oriented to accurately assess the lifetime structural performance of these tunnels. In this paper, the chloride transport process in segmental linings with the impact of hydrostatic pressure is illustrated, two transport approaches of chloride are suggested, and the time to corrosion initiation is predicted. Finally, a Monte Carlo Simulation is used in conjunction with a time-dependent failure probability estimation associated with the deteriorated structural performance due to the steel corrosion.
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M3 - Conference contribution
AN - SCOPUS:85063942430
SN - 9781138626331
T3 - Life-Cycle Analysis and Assessment in Civil Engineering: Towards an Integrated Vision - Proceedings of the 6th International Symposium on Life-Cycle Civil Engineering, IALCCE 2018
SP - 1031
EP - 1038
BT - Life-Cycle Analysis and Assessment in Civil Engineering
A2 - Frangopol, Dan M.
A2 - Caspeele, Robby
A2 - Taerwe, Luc
PB - CRC Press/Balkema
T2 - 6th International Symposium on Life-Cycle Civil Engineering, IALCCE 2018
Y2 - 28 October 2018 through 31 October 2018
ER -