Master of Science
Quiel, Spencer E.
Road tunnels are susceptible to severe fire-induced heat flux due to the constant presence of vehicular traffic combined with the likelihood of accidents and subsequent combustion. Rapid assessment of thermal demands is a necessity to calculate appropriate design limit states and to better understand risk potential in a multitude of underground environments. A proposed approach is developed which allows for rapid assessment of thermal demands using models that are validated and informed through computationally intensive numerical assessment, experimental data, and semi-empirical relationships based on first principles. Utilizing Rhino and Grasshopper, the discretized solid flame model is adapted to account for the confinement present in tunnel structures and development of a convective zone under the tunnel ceiling. The confined discretized solid flame model (CDSF) accurately captures the spatial distribution of heat flux in circular tunnels as compared to experimentally-validated, high fidelity numerical solutions. Potential for cracking, spalling, breach, and other adverse structural consequences can be evaluated based on contour maps of total heat flux over the tunnel liner.
Root, Kyle James, "Development and Verification of a Confined Discretized Solid Flame Model for Calculating Heat Flux on Concrete Tunnel Liners" (2018). Theses and Dissertations. 4368.