Practical Model Proposed for the Structural Analysis of Segmental Tunnels
Source abstract
Abstract
The construction of tunnels has become increasingly common in city infrastructure; tunnels are used to connect different places in a region (for transportation and/or drainage). In this study, the structural response of a typical segmental tunnel built in soft soil was studied using a simplified model which considers the coupling between segmental rings. From an engineering point of view, there is a need to use simple and reliable finite element models. Therefore, a 1D model based on the Finite Element Method (FEM) composed of beam elements to model the segments and elastic-linear springs and non-linear springs to model the mechanical behavior of the joints was performed. To validate the modeling strategy, the numerical results were compared to (lab-based) experimental results, under an Ultimate Limit State, obtained from the literature, and a comparison between numerical results considering a 3D numerical complex model which included the nonlinearity of concrete, reinforcing steel and the joints was performed. With this simplified model, we obtained a prediction of approximately 95% of the ultimate loading capacity compared to the results developed in the experimental and 3D models. This proposed model will help engineers in practice to create “rational” structural designs of segmental tunnel linings when a “low” interaction between rings is expected.
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Research context
OpenAlex topics: Geotechnical Engineering and Analysis · Geotechnical Engineering and Underground Structures · Geotechnical Engineering and Soil Stabilization
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Affiliations
Campus Celaya-Salvatierra Universidad de Guanajuato, Av. Ing. Javier Barros Sierra 201, Col. Ejido de Santa María del Refugio, C.P. Celaya 38140, Mexico
Instituto de Ingeniería, Universidad Nacional Autónoma de Mexico, Circuito Escolar, Ciudad Universitaria, C.P. Mexico City 04510, Mexico
Funding
Universidad de Guanajuato
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