Road restoration process and network configuration determined by restoration priority indices

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  • 復旧優先度指標による震後復旧優先道路形状に関する数理的研究
  • フッキュウ ユウセンド シヒョウ ニ ヨル シンゴ フッキュウ ユウセン ドウロ ケイジョウ ニ カンスル スウリテキ ケンキュウ

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Abstract

The purpose of this paper is to evaluate the road which should be maintained stronger under risk of seismic hazard. We establish a restoration model in which blockade road is restored by choosing a restoration road that minimizes average time within each phase of the process. By the model, we simulate the process of restoration in various patterns of road blockade, and evaluate the restoration priority of road with four priority indices. First, we clarify that restoration priority depends on the location of disaster responding bases and that priority is significantly affected by main road. Second, we prove that the road network with hierarchy is more robust than that without hierarchy. Third, by applying the model to road network in Nakano ward, Tokyo, we reveal that high priority roads cluster around disaster responding bases and also form skeletal structure that connects those clusters.

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