Modeling of Precast Concrete Tunnel Lining Subjected to Fire Event

摘要

Numerical simulations using FLAC3D were performed to evaluate the response of PrecastrnConcrete Tunnel Lining (PCTL) of the Eglinton-Scarborough Crosstown project to a major fire event. Thernbehavior of the concrete and the steel reinforcement was explicitly modeled using Eurocode 2 Part 1.2rnprovisions to obtain a more accurate prediction of the PCTL response. Pore-pressure build-up in the concreternwas also simulated to predict the occurrence of concrete spalling.rnThis paper presents the methodology and assumptions used in the simulations. A verification study wasrnperformed to compare the prediction made by the model and the experimental results by Phan (2008). Thernmodel was found to produce a slightly conservative prediction of the PCTL response to the major fire eventrnwhen compared to experimental results.