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SIIA Público
SISTEMA INTEGRAL DE INFORMACIÓN ACADÉMICA - PÚBLICO
Título del libro: Geotechnical Engineering In The Xxi Century: Lessons Learned And Future Challenges Título del capítulo: Analysis of Short Term Soil-Tunnel Lining Interaction
This paper presents different methods for analyzing short term
ground-structure interaction for segmented tunnel lining. These include
an analytical solution (AS) proposed by Naggar and Hincherberger (2008),
a hybrid method (geotechnical model combined with a structural model)
and numerical modeling in two and three dimensions using the Finite
Element Method (FEM). The analytical solution demands less time than
numerical solutions, furthermore, it allows making sensibility analysis
to soil parameters. However, analytical solutions are limited by their
hypotheses, for instance, assuming plane strain condition. 2D numerical
modeling permits obtaining approximate results in less time than the 3D
modeling, assuming that the characteristics of elements used for the
joints are appropriate. On the other hand, the 2D numerical and
analytical analysis lead to a flexible response of segmented lining and
may underestimate internal forces. Numerical modeling in 3D is the most
complete option because it allows the representation of the fundamental
aspects of the problem, principally coupling between contiguous rings
and boundary conditions. Nevertheless, 3D analyses may require excessive
computing time.