摘要
为了探讨灾害事件导致山区干线公路或重要路段处于中断状态下的交通节点间剩余路径应急疏散能力,提出了疏散连通度的概念,考虑到局域路网中交通节点间路段重要程度不同而赋予其权重,对路段的疏散连通度计算值予以修正,进而量化分析山区路网交通节点的应急疏散能力大小。最后,通过算例阐述了疏散连通度的计算过程,并针对山区路网特征,提出改善山区路网连通性的措施。结果表明:计算并比对山区路网中各路段疏散连通度修正值的大小,即可找出山区干线公路连通性薄弱的路段,对其进行改善,能有效提高山区路网灾害事件下的应急疏散能力,可为山区路网防灾规划提供依据。
In order to analyze emergency evacuation capacity of residual pathways between traffic nodes in local road network when mountainous arterial highways or key roads are blocked by disastrous events,a concept of connectivity reliability of emergency evacuation（CREE） was defined.Considering different importances of the edges between adjacent traffic nodes,edge weights were assigned in local road network.The edge weight was used to adjust values of CREE,so as to quantitatively analyze emergency evacuation capacity of traffic nodes in local mountainous road network.Finally,calculated process of CREE was illustrated through numerical example.According to characteristic of mountainous road network,the measures of improving connectivity reliability of the network were proposed.Results show that some weak links of mountainous road for connectivity are found by calculating and comparing the modified values of CREE to the edges of mountainous road network,and then the links are remedied appropriately,so as to efficiently improve emergency evacuation capacity of mountainous road network under calamity events.It will provide decision support for mountainous road network planning in disaster prevention and reduction.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2010年第4期102-106,126,共6页
China Journal of Highway and Transport
基金
国家自然科学基金项目(50878157)
湖南省交通科技进步与创新计划项目(200821)
关键词
交通工程
山区路网
图论
疏散连通度
交通节点
应急疏散
traffic engineering
mountainous road network
graph theory
CREE
traffic node
emergency evacuation
