The second-level indicators are the factors that affect the first-level indicators, such as the warning level of typhoon and rainstorm and the status of slope drainage system. The first-level indicators are just the disaster-causing factors, disaster-bearing carriers and disaster-pregnant environment. The probability of the accident is assessed by a weighted analytic hierarchy process, where two levels of indicators are adopted. Based on the satisfaction criterion, a risk assessment matrix for the main highway structures is established, in which the risk grade is determined by combining the probability and the severity of the structural accident in disasters. The disaster-pregnant environment refers to the environmental factors affecting the probability and severity of structural accident, such as topography, landforms, hydrology and artificial structures around the highway structures. The disaster-bearing carriers are the highway slope, bridge, tunnel and pavement. The disaster-causing factors include typhoon, severe tropical storm, heavy rain, flood and other natural disasters involved in the highway property insurance. In order to improve the risk management, reduce the losses and increase the insurance benefits, a risk assessment method for highway structures in natural disaster is proposed, in which three factors are considered including disaster-causing factors, disaster-bearing carriers and disaster-pregnant environment. Natural disasters pose a huge risk to property insurance of the highway structures.
0 Comments
Leave a Reply. |