General Approach To Risk Optimisation Of Road
Bridges Exposed To Accidental Situations
Author(s)
M. Sykora, M. Holicky & P. Maňas
Abstract
Road bridges in accidental situations represent the most vulnerable components
of transportation networks. Hazard situations may be caused by natural or manmade
hazards such as floods, terrorist attacks or impacts of vehicles. Decisions
concerning selection of protective measures can be based on the probabilistic
optimisation of expected costs. In general, total structural costs consist of initial
cost and consequences due to structural damage and failure. The initial cost
comprises of construction cost including cost of protective measures; the failure
consequences account for direct costs related to structural failure and indirect
costs due to malfunction of transportation network. The paper proposes a general
framework for the risk assessment based on Bayesian (causal) networks. The
cost optimisation requires data on probability of occurrence and magnitude of
selected accidental actions that often need to be based on expert assessments and
judgements only. The present study indicates that the probabilistic cost
optimisation in conjunction with Bayesian networks provide an effective tool for
decisions concerning appropriate protective measures for bridges endangered by
various types of hazards.
Keywords: risk optimisation, road bridges, accidental situations.
Keywords
risk optimisation, road bridges, accidental situations
Related Book
Other papers in this volume
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