an effective vibration reduction track structure, have been used onmany short-span elevated concrete bridge, but rarely used on longspanbridge. Thence, it is also of great significance to study thenoise reduction effect of the DPFS which are applied on the LSTCB.At present, there are relatively few studies on the structure-bornenoise of steel bridges, much less that of complex steel bridges, e.g.,LSTCB. However, there have been some studies on the noise ofbridges with relatively simple structures, such as simple steelbridges and concrete bridges.