The Analysis Of Parameter In The Expressway Bridge Under The Random Traffic Flowing And The Research Of Impacting Factors

This paper investigated the random traffic volume of the highway bridge, through theanalysis of the vehicle-bridge coupling vibration under the random traffic-flowing ofexpressway, with the collected traffic-flowing data from one bridge of Xi-Bao expressway,and study the random characteristics comprehensively and Systematically under the randomtraffic-flowing of the expressway, to analyze the various parameters data under the randomtraffic-flowing，and then study the influence of various parameters to the bridge impactingfactor. Along with the further research and development of vehicle-bridge coupling vibration,the issues related to parameters under the random traffic-flowing and the bridge impactingfactors should be further improved.In this paper, we summarized and absorbed the work done by the previous research, andaimed at the situation of expressway under the random traffic-flowing, the main researchwork has three parts, are as follows:1. Investigating the random traffic-flowing on a bridge of Xi-Bao expressway for24hours, recording the vehicle type, speed, traffic lane, lateral position and weight parametersare all recorded, and then statistically analyze these important parameters, such as theproportion of vehicle type, traffic lane distribution ratio, speed and weight etc.2. In the process of the survey under the random traffic-flowing for the24hours,collecting and recording the dynamic response extreme value of8beams under thecontinuous vehicle load, and analyzing the influence of dynamic response for differentvehicle types, to find the statistical law of extreme response for8beams;3. In the random traffic-flowing survey process, through analyzing the accumulateddynamic response extreme data, to calculate the impacting factor of each vehicle caused. Andthen go on the further analysis of the relationship between the impacting factors and the someimportant parameters, such as vehicle type, speed, weight, and the lane.Through the analysis of the above content, finally to draw the conclusion as follows.(1)The distribution of parameters under the random traffic-flowing more in line with the actualsituation, such as lane distribution, speed distribution in the different time;(2) The dynamicresponse extreme value indirectly reflected the running condition of vehicles in the different lanes and time.(3) The speed and impacting factors showed a positive feature, and theweight showed a negative correlation.