Research And Analysis Of Vehicle Impacting Vibration About Beam Bridge

The research on bridge vibration because of vehicle impacting is an important task in bridge dynamics field. The bridge vibration because of vehicle complicated and depend on many factors, such as bridge dynamic property, vehicle property, speed of vehicle, vehicle-bridge interaction, deck surface irregular etc. The study characteristics about bridge vibration because of vehicle in home and abroad is that resting on qualitative or quantitative analysis and, single factor analysis and rarely madding comprehensive and quantitative analysis. This article taking beam bridge as study object, basing on abundant tested data, adopting statistical method,comprehensively and quantitatively analyses influencing factors about beam bridge afford vehicle impact effect and also gets an formula witch more tallys with the actual situation by curve fitting tested data. In addition, it researches change of impact coefficient with bridge basic frequency and statistics and analyses natural vibration characteristics of the beam bridge. This article analyses probability distribution of vehicle speed because it is a main factor that affecting impact effect of vehicle. It takes NuJiang bride approach for an example, witch modeling analysis by ANSYS and gets theoretical dynamic response and impact coefficient in different vehicle speed and take them compare with measured results to research dynamic performance of beam bridge.In the last, it offer some useful advice in the field about bridge desining,operation and maintenance according to results that tested impact coefficient is different from criterion value which would lead to structural unsafe.