基于广义出行费用的城市道路网脆弱性评价

发布时间：2018-04-15 08:38

本文选题：城市道路网 + 脆弱性　；参考：《哈尔滨工业大学》2017年硕士论文

【摘要】：城市道路网作为交通系统的骨架,对城市发展有着至关重要的作用。但在自然灾害、大型活动、交通事故、道路施工等各种事件的影响下,路网部分路段可能失效,严重时,整个路网甚至瘫痪。科学地评价城市道路网脆弱性,有针对的进行路段改善,对城市道路网优化有着重要的指导意义。当前学者对城市道路网脆弱性的研究已经取得了诸多成果,但仍存在不足之处。本文所提出的基于广义出行费用的网络有效性指标和网络出行成本指标,可以更加精确地描述路网整体的性能。本文围绕城市道路网脆弱性评价,主要开展以下工作:首先,本文对城市道路网脆弱性及其相关概念进行界定,将脆弱性定义为道路受外界扰动时,性能受影响的敏感程度,对脆弱性影响因素进行机理分析,从定性和定量两个角度分析城市道路网脆弱性的影响因素。其次,针对城市用户,给出广义出行费用的定义,建立考虑货币、时间、舒适度三种成本的广义出行费用模型,利用SP和RP调查相结合的方法,分析哈尔滨市用户出行特点,结合分析数据对模型进行标定;本文通过删除路段的方式描述路网遭受干扰后的变化,为提高评价效率,利用拓扑指标和路段属性指标,建立路段重要度指数,选取指数前20%的路段作为关键路段;引入基于广义出行费用的网络有效性指标和网络出行成本指标,通过去除关键路段的方法,分析网络有效性和网络出行成本在去除关键路段前后的变化率,进而评价网络的脆弱性。最后,选取哈尔滨市某局部路网,应用本文提出的理论和方法,对路网进行简化,计算路段重要度指数,识别出路网中的关键路段,通过删除关键路段的方法,采用UE模型进行交通分配,得到路段删除前后网络有效性和网络出行成本的值,从而对路网进行脆弱性评价。
[Abstract]:As the skeleton of traffic system, urban road network plays an important role in urban development.However, under the influence of natural disasters, large-scale activities, traffic accidents, road construction and other events, some sections of the road network may fail, and when serious, the whole road network may even be paralyzed.To evaluate the vulnerability of urban road network scientifically and to improve the road section is of great significance to the optimization of urban road network.Many achievements have been made in the research of the vulnerability of urban road network, but there are still some shortcomings.The network efficiency index and network travel cost index based on generalized travel cost proposed in this paper can more accurately describe the overall performance of the road network.This paper focuses on the vulnerability assessment of urban road network. Firstly, this paper defines the vulnerability of urban road network and its related concepts, and defines vulnerability as the sensitivity to the impact of road performance when the road is disturbed by the outside world.The influencing factors of urban road network vulnerability are analyzed in terms of qualitative and quantitative analysis.Secondly, aiming at the urban users, this paper gives the definition of the generalized travel cost, establishes the generalized travel cost model considering the currency, time and comfort cost, and analyzes the travel characteristics of Harbin by means of SP and RP survey.The model is calibrated based on the analysis data. In order to improve the evaluation efficiency, the model is calibrated by deleting the road sections. In order to improve the evaluation efficiency, the importance index of the road sections is established by using the topological index and the attribute index of the road sections.Select the first 20% of the index as the key section, introduce the network efficiency index and network travel cost index based on the generalized travel cost, by removing the key sections of the method,This paper analyzes the efficiency of the network and the change rate of the network travel cost before and after the removal of the key sections, and then evaluates the vulnerability of the network.Finally, select a local road network in Harbin, apply the theory and method proposed in this paper, simplify the road network, calculate the road section importance index, identify the key sections of the road network, by deleting the key sections of the method,The UE model is used for traffic assignment, and the values of network efficiency and network travel cost before and after road deletion are obtained, and the vulnerability evaluation of the road network is carried out.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U491

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