This paper presents studies that focus on fire and explosion-induced damage of tunnel structures by employing the Discrete Element Method (DEM). By assuming a two-dimensional aggregate distribution reconstructing digital representation experimental concrete blocks, numerical model lining was established in PFC2D program. The temperature shock wave pressure at surface were obtained using Fluent ...

The basis of a possible fire design and verification approach to the linings RC tunnels, using performance-based approach, is presented. Starting from an extensive literature review, selection most relevant tunnel fires was analysed. study structural consequences these real may be considered as experimental data in fire, define damage levels. Back analyses were carried out main parameters contr...

The problem of damage accumulation in fiber-reinforced concrete to structures supporting underground workings and tunnel linings against dynamic loading is insufficiently studied. mechanical properties were determined the mechanism destruction with different reinforcement parameters described. Concrete Damaged Plasticity model for at are based on results lab experiments. Numerical simulation co...

The main objective of this study is to evaluate the workability of fresh portland cement concrete while it is still in the mixing truck by determining fundamental rheological parameters (plastic viscosity and yield stress). Nine concrete mixtures with different values of yield stress and plastic viscosity were tested in a concrete truck. The measurements made with the truck were based on the ty...