Under Heavy Vehicle Loading Bridges Force Analysis And Impact Research

With the continuous development of China's transportation industry,the vehicle's dynamic performance and load capacity continues to improve,so that the weight of the vehicle and the weight of the transport object is increasing.But due to the construction of China since reform and opening up the development of civil infrastructure vigorously,high-speed construction at the same time due to the limitation of the time technical ability and construction methods,and in the long-term impact load,the bearing capacity of many bridges has fallen to bear the weight of the vehicle is increasing.In this paper,based on this point,the study of heavy vehicle load under the influence of the bridge and the impact of the main work done the following:(1)Study on the development history of domestic and foreign bridge car load,and find relevant data of China's heavy truck transportation,heavy vehicles cause bridge collapse accident and other related data,that the more the effect of heavy vehicle load for bridge health.(2)The premise of the vehicle load on the bridge,the structure under the effect of load calculation model are introduced,and the vibration equation of bridge is given;and the vehicle load calculation,vehicle load response measurement and layout specifications are analyzed,the development trend of the effect of combination of,for some Co.element modeling software ANSYS/LS-DYNA were introduced and the engineering calculation software Midas Civil.(3)The use of ANSYS/LS-DYNA to establish the solid model of vehicle and bridge,combined to form the theoretical model through the bridge of the vehicle,and through the control variable method,keeping the other parameters unchanged,change the weight factor,extraction of bridge deflection,stress,vibration and impact coefficient of the relevant data,the change rule and dynamic response of the bridge.(4)With the heavy vehicle through the bridge load experiment project,using Midas Civil to establish the bridge model,layout of lane and vehicle load,analyzed data extraction model and engineering field data,the bridge stress change.