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Structural Engineering and Mechanics
  Volume 81, Number 4, February25 2022 , pages 513-522

Simplified nonlinear simulation for composite segmental lining of rectangular shield tunnels
Huiling Zhao, Xian Liu and Yong Yuan

    Steel-concrete composite segments replacing the conventional reinforced concrete segments can provide the rectangular shield tunnel superiorities on bearing capacity, ductility and economy. A simplified model with high-efficiency on computation is proposed for investigating the nonlinear response of the rectangular tunnel lining composed of composite segments. The simulation model is developed by an assembly of nonlinear fiber beam elements and spring elements to express the transfer mechanism of forces through components of composite segments, and radial joints. The simulation is conducted with the considerations of material nonlinearity and geometric nonlinearity associated with the whole loading process. The validity of the model is evaluated through comparison of the proposed nonlinear simulation with results obtained from the fullscale test of the segmental tunnel lining. Furthermore, a parameter study is conducted by means of the simplified model. The results show that the stiffness of the radial joint at haunch of the ling and the thickness of inner steel plate of segments have remarkable influence on the behaviour of the lining.
Key Words
    composite section; nonlinear analysis; rectangular lining; shield tunnel; simplified model
Huiling Zhao: Department of Civil Engineering, Shanghai University, 99 Shangda Road, Shanghai, China
Xian Liu, Yong Yuan: State Key Laboratory for Hazard Reduction in Civil Engineering, Tongji University, 1239 Siping Road, Shanghai, China; Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai, China

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