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  Investigation of the influence of cracking on the stiffness and capacity of segmental tunnel lining

  The rotational stiffness of cracked segments reduces the overall stiffness of the segmental lining ring and may influence the stiffness and capacity of lining system compared to that assumed in the design. This paper firstly investigates the non-linear behavior of the longitudinal joints and cracks by comparing analytical closed form solutions with the results of numerical analyses. Then, the paper investigates the effects of segment joints and cracks on the response of the lining, by performing parametric numerical analyses of segmental lining systems with joints and cracks and by comparing with the results of analyses where lining is modelled as a continuous cylindrical shell.

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