High-speed railways (HSRs) are designed and constructed, incorporating numerous bridges that typically comprise a substantial portion of the infrastructure. These bridges often serve to accommodate turnouts in the throat area of the stations. When subjected to temperature changes, the bridge girders experience expansion and contraction along with the continuously welded rail (CWR) turnouts placed on them, leading to a coupling effect involving vertical, lateral, and longitudinal dynamics between them. When trains traverse these bridges, a coupling dynamic interaction system is further formed, encompassing the trains, turnouts, and bridges, and among them interaction and mutual influence occur. Incorporating the technical characteristics of high-speed trains, high-speed turnouts, and viaducts.