Life-cycle Cost Analysis (LCCA) on Steel Bridge Pavement Structural Composition

In this paper, double-layer SMA structure、GA+ SMA、EA+SMA are the main study object, and the net present value analysis is chosen, obtaining the life cycle cost net present value(NPV) of three pavement structural composition by determining cost structure, life cycle and discount rate. The results show that cost performance of double-layer SMA pavement structure is the best and the life-cycle cost of EA+SMA pavement structure is highest. The study can provide a reference for the selection of steel bridge deck pavement structure composition types.