Analysis and design considerations for non-mechanical ventilation schemes for transit system infrastructure

摘要

Metropolitan growth demands the introduction of sophisticated and sustainable design features to transportation infrastructure. This paper outlines unique fire engineering analysis and design considerations for non-mechanical ventilation in rail station and Bus Rapid Transit (BRT) infrastructure. Station platform canopy structure design should consider meteorological wind impacts on station and headhouse structure as it affects buoyant ventilation of smoke from under canopy structure. BRT tunnel design is dependent on elements such as fire size, tunnel geometry, and meteorological wind conditions. Tunnel ceiling height and localized portal flow conditions of air drawn in to fire incident and smoke recirculation play a crucial role to limit fire hazard exposure to tunnel occupants.