Study On Capacity Of Post-earthquake Transportation System

Transportation system is a wide range network system, and is an important component of the lifeline system. With the development of modernization and economy, transportation system becomes the necessary condition for the survival human being. Transportation system is vulnerable to the earthquake, and its damage will bring huge direct and indirect economic losses and will brings great difficulty to the emergency rescue work post-earthquake. The research work of this thesis focus on the passing capability, maximal path capacity and network element importance of transport system, main contents are as following:1. The reseach background and the current situation areintroduced, including HCM, the research current situation of path network flow of transportation system, and the research current situation of transportation network system reliability.2. The traffic capacity definition and classification of transportation system are introduced, and the calculation methods and the influence factors are discussed. The traffic distribution simulation method is selected as the method of passing capability analyes, and the passing capacity of an example road network is analysed.3. The definition of maximal path capacity of transport system, single-source optimal path description and classification, optimal path algorithm and their comparison are discussed. The maximal path capacity method is established by modification of Dijkstra algorithm–improved Dijkstra algorithm, the maximal flow path of the example road network is analysed.4. The cell importance is introduced and the comparison study is made of analyses methods of the cell importance. The methods based on the passing capacity and system reliability is given. The cell importance on passing capacity and system reliability of example road network is analysed.