Author(s): LIU Aihua, WU Chao, XU Wenbin, School of Environmental Science and Engineering, Guangdong University of Technology, School of Resources and Safety Engineering, Central South University
Pages: 2793-2801
Year: 2016 Issue:  8
Journal: Journal of Central South University of Technology
Keyword:  urban lifeline; damage sensitivity; assessment method; node; brittleness entropy;
Abstract: To conduct the comprehensive assessment for the high sensitivity and the coupling amplification of urban lifelines during disasters, the theory of brittleness entropy was applied to study the damage sensitivity of urban lifelines.On the basis of defining the concept of the vulnerability of and damage sensitivity of hazard-affected bodies, the evaluation index system of damage sensitivity of urban lifelines was built. After comprehensively considering the importance of the structure and the function of lifeline network nodes, the calculation model of the damage sensitivity index of mono-functional network structure was established with the ratio of the actual equilibrium entropy to the maximum entropy of the urban lifeline network. Starting from the impact mechanism, the Boolean matrix of the different kinds of influence ways was constructed according to the different mutual influence methods between the lifeline systems.The brittleness relevance degree of the lifeline subsystems was analyzed using the theory of brittle entropy. And the model was gotten to calculate the damage sensitivity of the whole network structure of urban lifeline. The damage sensitivity evaluation model of urban lifeline was established from two aspects of the quality damage sensitivity and the network structure damage sensitivity. The results show that the brittleness connection between the subsystems can increase the damage sensitivity of urban lifeline. The entropy of brittleness connection is the largest between communication system and other subsystems. After the disaster, it should be first repaired.