Influence of Hoop Coefficient on Dynamic Response of Railway Bridge Protective Frame under Impact Load

Abstract

The paper analyzes that hoop coefficients of the concrete-filled steel tube influence on dynamic response of the railway bridge height limit protective frame under impact load by using ANSYS/LS-DYNA. Change hoop coefficient of the concrete-filled steel tube structure by changing steel tube wall thickness. The result shows that with increase of steel tube wall thickness, the average impact force of protective frame will increase and the displacement and deformation will reduce, and protective frame can resist greater impact load. It will provide the reference for design of railway bridge height limit protective frame.

Simulation Analysis of Coupled Structural Vibration of Highway Railway Combined Bridge Induced by Overlapping Action of Vehicle and Train

“…Because the calculation model is relatively complex and has many degrees of freedom, the vehicle model was not established, but the vehicle load was added to the bridge as a point load. The degrees of freedom of the train and car models established in the literature [9][10][11][12][13][14][15][16][17][18][19][20] are 15 and 7, respectively. The Monte Carlo method is used for the simulation of track irregularity and road surface irregularity, considering the impact of road roughness on the vibration of the train-bridge-vehicle coupling system.…”

Research on Simplified Calculation Method of Coupled Vibration of Vehicle‐Bridge System

“…Li and Zhang [9] obtained the moving load velocities which led to the extreme responses of bridge free vibration under single-moving constant force or harmonic force and put forward the corresponding formula by analyzing the moving load spectrum in detail. Nowadays, a large number of scholars use this method to analyze the dynamics of bridges [10][11][12][13][14][15][16][17], and Europe [18] wrote this model into specifications to guide the bridge design.…”