ABSTRACT
ABSTRACT Life-cycle cost analysis studies on bridges that consider hazard failure in the formulation often use the PEER approximation of a Poisson renewal of the bridge capacity after each hazard occurrence. For repair actions such as replacement of the bridge or a bridge component, this renewal assumption can be held true. However, for repair actions such as epoxy injection, concrete patch and “no action”, the bridge capacity is not always renewed and this could have varied implications on the bridge performance for a subsequent earthquake or even other hazards in its lifetime. This paper presents a stochastic framework to explore the impact of different repair actions as well as the Poisson renewal assumption on the lifetime multi-hazard cost incurred by a bridge. The methodology demonstrated through a case study bridge column shows that the homogeneous Poisson renewal assumption often underestimates and a non-homogeneous Poisson assumption overestimates the repair cost incurred for bridge columns. Different repair actions impact the column capacity differently and this influences the hazard performance and cost incurred in the subsequent hazard event.
