The Distribution And Statistical Parameters Of Maximum Of Vehicle Loads On Highway Bridges

Recent years,with the rapid development of China’s economy,China’s road construction has developed rapidly.According to relevant data,the reliability of highway bridges constructed according to current design standards is not good enough to keep up with the times,which will lead to a series of safety problems.One of the main factors affecting the structural design of highway bridges is the load of highway bridges,and vehicle load is one of the main influencing factors of the load effect of highway bridges.Therefore,studying the distribution of vehicle loads plays an important role in the design of highway bridge structures.In this paper,the data of the Humen Bridge collected by the Mobile Weighing System(VIM)is used to study the maximum distribution and statistical parameters of the axle weight of the Humen Bridge.In this paper,the sample data is extracted by repeated random sampling method for distribution fitting test.The fitting distribution shows that the distribution of the Humen bridge weight and the axle weight for one year is the Weibull distribution.According to the extreme value distribution theory,the maximum distribution of vehicle weight and axle load in the design reference period of 100 years is obtained.At the same time,the Monte Carlo method is used to simulate the maximum distribution of vehicle weight and axle load in the design base period of 100 years.Finally,the maximum distributions obtained under the two methods are compared.By comparison,it is found that the parameters of the maximum value distribution obtained by the two methods are similar,but the parameters of the maximum value distribution calculated by the extreme value distribution theory will be larger.