The Dynamic Response Of Skew Slab Bridge Under Highway Traffic Load

According to the function of highway traffic loads in skew slab bridges have the dynamic response of the situation.This paper presents the calculation model of traffic load and skew slab bridge.As to skew slab bridge reinforcement of stiffened skew plate structure.Analysis of structural vibration characteristics by Pb-2 Rayleigh-Ritz method.Then by using the finite element method and Newmark-? method to study the response of skew slab bridges subjected to the highway traffic load.The influence and driving speed,vehicle wheelbase,vehicle,bridge span length,different skew angle and road roughness factors on dynamic response of skew slab bridges are analyzed.The main research in this paper is presented as follows:(1)Using Pb-2 Rayleigh-Ritz method to analyze the vibration characteristics of stiffened skew plate.The natural frequency of the structure is calculated,then the results are compared with the finite element method to verify the accuracy of the method;(2)The subsystem of highway load and skew bridges as two separate,established models respectively.The compatibility conditions of displacement and force of vehicle-bridge system between the two subsystems,the vehicle-bridge coupling;(3)According to the pavement roughness power spectrum density function,the pavement roughness is simulated in the time domain based on the Matlab platform.And will it as the vehicle-bridge system vibration excitation;(4)By using Newmark-? method,the equation of motion equation of highway traffic load is calculated.This result is used to generate a force on the skew slab bridge.Specific implementation,the use of Matlab language to write the equations for numerical calculation.Finally,the paper discusses the factors affecting the road irregularity and vehicle speed,vehicle wheelbase,the length of the bridge,bridge,skew angle of skew slab bridge dynamic response.The innovation of this paper is in theory.The model for highway skew slab bridge reinforced plate structure.Using Pb-2 Rayleigh-Ritz method to analyze the vibration characteristics of stiffened skew plate.The introduction of the Newmark-?method to make the numerical analysis problem under the function of highway bridge load dynamic response.And the influence of skew slab bridge dynamic response parameters were analyzed.The results can provide theoretical reference and practical guidance for the design of the bridge.