Damage Model of Bridge Bearing and Its Influence on Train-Track-Bridge Dynamic System

Bridge bearing damage is unavoidable in railway engineering. This work presents an investigation on the model of bridge and its influence dynamic responses high-speed train-track-bridge system. Primarily, mathematical description explained detail, which then compared with traditional linear model. Then a 3D considering established based interaction theory. Adopting model, influences single-point-damage multi-point-damage behaviors coupled system are deeply investigated. Results show that calculated obtained by proposed different, especially frequency-domain. Compared to results smaller due additional damping effect. has almost no train vibrations, while great effect vibrations. The z-direction mainly affects vertical y-direction lateral Among all damaged bearings this work, x-direction least fixed larger than other bearings, indicating more attentions should be paid health monitoring