Polya urn model-based performance assessment of PSC bridges: prestress loss consideration

Advances in Bridge Engineering

Table 1 Reward structure considered

Condition State of the Bridge System	% of girders with more than allowable prestress loss	Reward rate^a
Very Good	0–20	10
Satisfactory	> 20–40	5
Poor	> 40–60	2
Serious	> 60–80	1
Critical	> 80–100	0.1

^aThe reward rate assumed in this paper is akin to the condition rating of the components of a bridge prescribed in United States National Bridge Inventory. An excellent review of the bridge condition rating is given in Omar and Nehdi (Omar and Nehdi 2018)