Structural Engineering and Mechanics

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Nonlinear simulation of tunnel linings with a simplified numerical modelling

  • Zhao, Huiling (State Key Laboratory for Hazard Reduction in Civil Engineering, Tongji University) ;
  • Liu, Xian (State Key Laboratory for Hazard Reduction in Civil Engineering, Tongji University) ;
  • Bao, Yihai (Department of Civil and Environmental Engineering, University of California) ;
  • Yuan, Yong (State Key Laboratory for Hazard Reduction in Civil Engineering, Tongji University)
  • Received : 2015.06.05
  • Accepted : 2016.10.25
  • Published : 2017.03.10
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Abstract

A high-efficiency simplified modelling approach is proposed for investigating the nonlinear responses of reinforced concrete linings of shield tunnels. Material and geometric nonlinearities are considered in the analysis of the lining structures undergoing large deformation before ultimately losing the load-carrying capacity. A beam-spring element model is developed to capture the force-transfer mechanism between lining segments and radial joints. The developed model is validated by comparing analyzed results to experimental results of a single-ring lining structure under two loading conditions: the ground overloading and the lateral unloading respectively. The results show that the lining structure under the lateral unloading due to excavation on the both sides of the tunnel is more vulnerable compared to the case of ground overloading on the top of the tunnel. A parameter study is conducted and results indicate that the lateral pressure coefficient has the greatest influence on the behaviour of the lining structure.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, Tongji University

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