Numerical Simulation Of Secondary Disasters Of Earthquake

In this paper, domestic and international current situation of studies on the numerical simulation of secondary disasters of earthquake have been summed up. Then some existing mathematic models of the numerical simulation of secondary disasters are analyzed. Finally, some models of effecting disasters and loss assessment methods of secondary disasters are selected and built up.Based on the Geographic Information System (GIS), programs of numerical simulation and loss assessment of secondary disasters are compiled. It is quantitative, visual, effective basis of assessment at seismic emergence, loss assessment of secondary disasters, daily managements of disaster sources.The secondary disasters following the destructive earthquake have relatively high dangerous in urban. In this paper, numerical simulations of several kinds of typical secondary disasters of earthquake are studied for cities. Some main works are following:1. Summing up domestic and international current situation of studies on secondary disasters of earthquake. And analyzing the basic theory and adopted mathematics models in the field.2. Studying on the numerical simulation of secondary fire of earthquake: the occurrence probability models of secondary fire are given according to attributes of the building, the method of defining high hazard area is defined; the dynamic numerical simulations of secondary fire are made by using Huygens' Principle in urban, the numerical simulation of the spread range and the spread course of secondary fire are gained [35l3. Studying on the numerical simulation of secondary explosion: some models of dangerous area of casualties, distribution area of destructive buildings, numerical calculations of casualties, economic losses and serious degree calculation after explosion are provided by using the law of shock wave's harm and destroy.4. Studying on the numerical simulation of secondary poison gas leakage and diffusion: three kinds of diffusion models are set up according to the reality by using Gauss mathematics model which is used in common; its numericalsimulations of the spread range and the spread course are given.5. According to the actual need, analysis and numerical simulations of secondary disasters are carried on by using the Matlab, AcrWiew3.2a and AcrWiew8.l software separately6. Based on GIS, programs of numerical simulations of secondary disasters are compiled and corresponding analysis examples are given in AcrWiew8.l software.