考虑拥堵效应的城市道路交通网络脆弱性分析

发布时间：2018-06-16 11:06

本文选题：城市道路交通网络 + 级联失效　；参考：《华中科技大学》2015年硕士论文

【摘要】：城市道路交通网络作为城市活动的重要载体,有关其脆弱性的研究已经引起许多学者的研究兴趣。本文在城市道路交通网络脆弱性分析的过程中考虑了拥堵效应,探求通过缓解交通拥堵来降低脆弱性的方法。本文采用原始法构建城市道路网络拓扑结构,并考虑交通需求的影响从结构脆弱性和状态脆弱性两方面来分析城市道路交通网络的脆弱性,为后文的脆弱性分析过程做铺垫。其次,主要考虑了由于路段拥堵导致失效而引发的级联失效过程中的脆弱性和拥堵程度变化,按照静态脆弱性和动态脆弱性的评估原理并引入拥堵因子进行级联失效过程中脆弱性和拥堵程度的评估。再次,在实际路网中,在VISUM中将交通流量加载到路网上,探求关键路段发生拥堵的可能性、关键路段和非关键路段失效和不同失效条件对路网脆弱性评估的影响以及脆弱性指标与拥堵因子的相关性分析。最后,提出从增大路段设计通行能力、基于路段重要度分配路段备用能力系数、区域单向交通设置等方面来进行拥堵的缓解从而降低路网的脆弱性:分别从上述三方面对原始路网进行改造,并分析改造路网与原始路网相同的级联失效过程中脆弱性和拥堵程度的变化,发现上述三种方法均可以在一定程度上降低路网的拥堵程度和脆弱性。本文考虑了由于路段拥堵导致失效而引发的级联失效过程中脆弱性和拥堵程度的变化,提出从缓解拥堵方面来降低路网的脆弱性,提出的方法有一定的可行性,能够为交通管理者提供策略上的支持,为道路交通网络的良性发展提供依据。
[Abstract]:As an important carrier of urban activities, urban road traffic network has attracted the interest of many scholars. In this paper, the traffic congestion effect is considered in the process of vulnerability analysis of urban road traffic network, and the method of reducing the vulnerability by alleviating traffic congestion is explored. This paper uses the original method to construct the topological structure of urban road network, and analyzes the vulnerability of urban road traffic network from two aspects of structural fragility and state vulnerability, considering the influence of traffic demand, which will pave the way for the later vulnerability analysis process. Secondly, the vulnerability and congestion degree of cascade failure caused by road congestion are mainly considered. According to the principle of static and dynamic vulnerability assessment and the introduction of congestion factor to evaluate the vulnerability and congestion in cascade failure process. Thirdly, in the actual road network, the traffic flow is loaded into the road network in Visum to explore the possibility of congestion on key road sections. The influence of failure and different failure conditions of critical and non-critical sections on the vulnerability assessment of road network and the correlation analysis between vulnerability index and congestion factor. Finally, it is proposed to allocate the spare capacity coefficient of the road section based on the importance of the section by increasing the design capacity of the road section. In order to reduce the vulnerability of the road network, the regional one-way traffic arrangement is used to alleviate congestion and reduce the vulnerability of the road network. The original road network is transformed from the above three aspects, respectively. The changes of the vulnerability and congestion degree in the same cascade failure process of the reconstructed road network and the original road network are analyzed. It is found that the above three methods can reduce the congestion degree and the vulnerability of the road network to a certain extent. In this paper, we consider the changes of vulnerability and congestion degree in cascade failure caused by road congestion, and propose to reduce the vulnerability of road network from the aspect of alleviating congestion. The proposed method is feasible. It can provide strategic support for traffic managers and provide basis for the benign development of road traffic network.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U491

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