A STUDY ON BRIDGE MANAGEMENT STRATEGY INCLUDING ABOLITION BY COMPARING REDUCTION OF MAINTENANCE COST AND DECLINING OF AREA UTILITY

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  • 維持管理費用の縮減と地域の効用の低下の比較による廃橋を含めた橋梁管理のあり方に関する研究

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In Japan the road bridge is facing rapid deterioration and its damage is serious. As a results, even if preventive maintenance are carried out, its repair and renewal expenses are huge and it's difficult to maintain all road bridges with preventive maintenance type. Therefore, there is a need to adopt not only preventive maintenance but also abolition of road bridge. But in order to gain understanding of the residents, a method to objectively show the effect and impact of abolition of the road bridge is required. In this study, we presented a method to compare the reduction effect of future maintenance and renewal cost and the loss due to the decline of area utility as calculation of cost effectiveness by abolition of bridge. As a result of calculation, there were no bridges with the effect of abolition. However, compared to other bridges, there were bridges with low maintenance effect and there is a possibility that these bridges have room for abolishment. In addition, we presented how to maintain including abolition of bridge as follows. When you abolish the bridge, it is one way to show the proposed infrastructure to compensate for losses. On the other hand, the effect of maintaining the bridge increases by decreasing maintenance costs.

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