Impacting Factor Caused by Highway Bridge Deck Roughness

摘要

In order to analyse the interaction of highway bridge and vehicle, an analysis method of couplevibration between 1/2-four degree vehicle model and highway bridge is presented. According to theroad power spectral density(PSD) function advised by GB/T 7031-1986(China Standard), thecoefficients of different bridge deck roughness are obtained, which are taken as the inputtingexcitation of 1/2 vertical model for vehicle dynamics. The dynamic response of maximummoment and vertical displacement for the simply-supported beam and the continuous beam underdifferent bridge deck roughness is analyzed by numerical simulation, and the variety rule ofimpacting factor is obtained. The result shows that the impacting factor increases non-linearly alongwith the grade of bridge deck roughness. The grade of bridge deck roughness is the mostremarkable factor for the vehicle-bridge dynamic interaction.