Analysis of Long-term Management for Multiple Bridges Considering Road User Cost

Abstract

In the long-term management for bridges, it is necessary to consider not only repair cost but also road user cost caused by repair work. In this paper, it aims to propose an evaluation method of long-term management for multiple bridges considering road user cost. For the purpose, we evaluate the management scenarios for multiple bridges with life cycle cost, which is estimated with the combined method of bridge deterioration model and traffic assignment model. As a result, we can clearly recognize that road user cost is important for management, since it amounts almost half of the repair cost. Furthermore, the preventive management scenario is superior to the other management scenarios without the specific case which the bridges degrade slowly. In addition, it is confirmed that the preventive management scenario is more suitable as a long-term management plan for bridges than the post management scenario, though the repair cost and road user cost is estimated larger only at the initial period.