Author(s)

M. Guarascio, M. Lombardi, G. Rossi & G. Sciarra

Abstract

In this paper the quantitative risk analysis procedure has been used to face two specific aspects of the fire safety design in road and rail tunnel: • the smoke control system effectiveness; • the spalling effect and structural reliability of the liners. The first example deals with the risk comparative assessment of two alternative systems for smoke control in a road tunnel. The societal risk indicator has been used to select the more effective system. The second one aims to consider a reliability based approach for structural design of the tunnel liners in order to identify the design fire load preventing from the spalling effect at a given probability level. Keywords: quantitative risk indicators, residual risk flow, back cumulated risk distribution, structural reliability, design point, safety margin, thermo-fluiddynamic analysis.

Keywords

quantitative risk indicators, residual risk flow, back cumulated risk distribution, structural reliability, design point, safety margin, thermo-fluiddynamic analysis