Performance and Analytic Modeling of Tunnel Lining Segment under Cyclic Loading

摘要

The present work is an attempt to better understand the flexural behavior of an instrumented reinforced concrete beam with the cyclic four-point load test. Here, an analytic model that computes the load-moment and load-deformation relationships by taking into account the nonlinearity of section caused by stiffness reduction due to tensile cracking and the validity of moment of inertia is developed. Validity of this model is verified by the excellent agreement between the analytic modeling results and the theoretical solution. The experimental results are compared with the modeling result for assessing applicability of the optic fiber sensor in the beam specimen. After that, a curved beam member representing a smart tunnel lining segment (STLS) is loaded using the same manner. The comparison on flexural behavior shows that the proposed analytic model can provide a best prediction.