Construction Risk Assessment Of Three Tower Self Anchored Suspension Bridge Method Study

With the continuous expansion of Chinese infrastructure scale,as part of infrastructure construction,bridges are gradually transferring to places with adverse geographical and climatic environment,such as rivers,lakes,seas,mountains and plateaus.These bad factors increase the difficulty and risks of bridge construction.In order to prevent bridge construction accidents,ensure safety and project,Risk assessment of bridge construction has always been a topic of concern and continuous research in Chinese bridge engineering community.Based on the development history of suspension bridge and necessity of risk research,this paper applies the basic principles of risk assessment to the field of bridge construction,and establishes the overall framework of risk analysis from three aspects of risk identification,risk assessment and risk decision-making.The main research contents are as follows:(1)The development history of suspension bridge,the present situation of bridge risk research at home and abroad,the necessity and existing problems of risk research are discussed.(2)According to the mechanical characteristics,construction technology and finite element modeling of three tower self anchored suspension bridge,the main risk sources are found out and the risk classification list is established.The relative weight of each risk factor is given by expert survey method,and the probability and loss consequence grade of risk factors are determined by fuzzy comprehensive evaluation method.Finally,ALARP is used to determine the risk factors.The criteria determine the level of risk acceptance and risk management strategy.(3)Based on the "Yellow River Bridge on Fenghuang road in Jinan",this paper uses the overall framework of risk assessment to comprehensively analyze and evaluate the construction risk of the bridge.Finally,according to the risk assessment level,it provides reference for the bridge construction.