Anexploratory Discussion On Railroad Steel Slab Beam Crosswise Strengthening Technique

The transverse stiffness of medium-span railway bridge becomes insufficient and its transverse vibration becomes larger commonly under the raised speed freight train. In order to increase the bridge transverse nature frequency and decrease the transverse amplitude, this paper intended to analyze and research the transverse stiffness reinforcement of 32m deck steel plate girder bridge, based on the analysis of vehicle-bridge transverse vibration mechanism.In this paper, the three-dimensional space FE model are carried out with the aid of the FEM program Algor99 for the analysis of dynamic proporty. Further more, the vehicle - birdge transverse vibration model was created, based on the sinusoidal yaw wave theory, through imputing random artificial haunting waves and track irregularity. In order to increase the bridge transverse nature frequency and decrease the transverse amplitude, the calculating model of structure-MTMD system is developed and the motion differential equation is derived. The influence regulations of MTMD design parameters on dynamic magnification factor are analyzed fully. The relation with effective speed range of MTMD controlling Railway Vehicle-bridge transverse interaction dynamic response is analyzed and the feasibility of various reinforcement plans is evaluated. The conclusion in this paper could be a meaningful theory reference for the transverse vibration problem of deck steel plate girder bridge, with the increasing of train speed in our country.