Life-cycle cost analysis of a TPSM applied continuouscomposite girder bridge

Transverse cracks in composite girder bridges are repeatedly reported because the tensile stresses in the concrete deckinduced by the negative bending moment at the intermediate supports of continuous composite girder bridges. The occurredtransverse cracks rapidly deteriorate the concrete deck, giving rise to frequent need for maintenance work. Prestressing methodsare usually utilized in this kind of situation for the concrete structures, however no effective and feasible method has yet beenproposed for steel-concrete composite structures. A new type of prestressing method entitled Thermal prestressing method(TPSM) has been proposed for innovative construction of continuous composite girder bridges, as effective prestressing methodto prevent the occurrence of the tensile transverse crack of the concrete deck at the negative bending moment regions. In thisstudy, the methodology for the economic analysis of TPSM applied bridges and case studies are introduced based on the lifecyclecost, considering initial construction cost and maintenance cost, to demonstrate the financial viability of the TPSM appliedbridges compared to conventional continuous composite girder bridges.