Vibration Control of the Steel-Concrete Composite Box Girder Bridge with Slip and Shear-Lag Effects by MTMDs under the Train-Bridge Interaction

Steel-concrete composite girder bridges, in essence, are thin-walled structures, the dynamic responses of which will be greater than those a typical Euler–Bernoulli beam under train-bridge interaction because shear lag and interface slip. Thus, this study, analysis model train-composite box bridge-multiple tuned mass damper (MTMD) coupling system is proposed, with derived equations time-varying system. Meanwhile, program compiled using Newmark-β method for solution, combined optimization toolbox to solve complex design problems MTMDs involved. Finally, factors affecting vibration-damping effect studied, such as ratio MTMDs, number trains, slip bridge.