Design Parameters Sensitivity Analyses of Precast Concrete Segmental Tunnel Liners

摘要

Designers traditionally prefer to use empirical equations and model tunnel liners as continuousrncircular rings. However, segmental liners incorporate longitudinal and circumferential joints. 2D and 3Drnfinite element (FE) software can be used to investigate the effect of number of joints, joint stiffness and jointrngeometry on the structural behavior of a segmental lining system.rnThis paper provides the result of a parametric study using 2D analyses for different tunnel diameters andrnproviding comparison with different empirical solutions. It also presents the difference between 2D and 3Drnanalyses for segmental lining with various joint boundaries and geometry.