Practical nonlinear analysis of unreinforced concrete tunnel linings

• Nonlinear finite element analysis of unreinforced concrete tunnel linings.
• Gravity, environmental, fire, blast and seismic loading considered.
• Application in actually constructed tunnels in central Greece.
• Conclusions regarding performance of unreinforced concrete tunnel linings.

A comprehensive methodology for modelling, analyzing and assessing the structural response of unreinforced concrete tunnel linings is presented. Various modelling techniques are described, considering the plane finite element representation of the lining geometry, material constitutive laws, and boundary and interface conditions. Furthermore, all relevant external loading cases are studied, including gravity, environmental, fire, blast, and seismic loading. Potential pitfalls in the modelling and analysis procedures are identified and properly dealt with. The suggested methodology is finally applied to actual tunnel linings and the interpretation of the analysis results leads to important conclusions regarding the applicability of different analysis methods and the performance of unreinforced concrete linings.

Figure optionsDownload as PowerPoint slide