Steel Truss–Concrete Single T Rigid Frame Composite Bridge Dynamic Response Of Vehicle And Bridge

Steel truss – concrete single T rigid frame composite bridge is a new type of bridge structure that has been booming in recent years.It is composed of main load bearing structure,prestressed concrete beam and stiffening steel truss girder,and steel truss is mainly stiffened.The steel truss mainly plays a stiffening effect,which greatly improves the overall stiffness of the structure,and reduces the creep deformation obviously,greatly improves the angle of the beam end,and effectively ensures the stability of the ballastless track on the bridge.With the increase of the speed and passenger traffic,the dynamic response of the bridge has been paid more and more attention.The study on the bridge response of this type of bridge is relatively few at home and abroad,and the structure is affected by the temperature change,and it is easy to produce additional deformation under the temperature effect,which leads to the track irregularity affecting the dynamic response of bridge driving.Taking the Yellow River Steel truss – concrete single T rigid frame composite bridge as the engineering background,the main works are as follows:1.The dynamic response measurement system of a single T rigid frame stiffened steel truss composite structure bridge is selected to establish the dynamic response measurement system.The dynamic response of the bridge is analyzed by installing the sensor to measure the dynamic acceleration and dynamic displacement of the bridge when the train passes the bridge at a certain speed.2.ANSYS software is used to establish the structure of the beam element model and analyze the dynamic response of the bridge by introducing the SIMPACK software to analyze the dynamic response of the bridge,and compare the response of the bridge with the field measured results to verify the accuracy of the numerical simulation.3.The dynamic response of the single T stiffened steel truss composite structure bridge under different speed is analyzed by SIMPACK software,and the dynamic performance of the vehicle bridge system is evaluated according to the standard.4.Use Midas to establish the solid model of the single T rigid frame stiffened steel truss composite structure bridge and apply various temperature conditions to extract the deformation of the bridge surface and generate the track irregularity document into the SIMPACK software,to study the influence of the track irregularity caused by the temperature on the riding stability of the bridge.