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道路网结构可靠性分析

, PP. 77-81

Keywords: 交通工程,交通运输网络,拓扑指数,紧急救援,生命线系统

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Abstract:

为了加强区域路网在进行灾害紧急疏散、救援等方面的作用,避免因路网破坏而导致的城市功能性孤立、救援行动迟缓和次生灾害增多等现象发生,采用拓扑指数分析路网的分散、集中程度及路网结构可靠性。分析结果表明加强孤立节点与其他节点的联系,可以大大增加整体路网的拓扑指数值;若2个节点之间已有1条或2条连接路段,在这个节点对之间新增一条新的路段对于整体路网稳定性的贡献不大,径向路网能够显著增强路网结构在抵抗灾害方面的可靠性;应用拓扑指数可清晰地定义路网的重要路段,为新增线路建设序列、灾后救援线路选择等方面提供方法支持。

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