Dynamic Properties of Steel Pipe-encased Concrete Arch Bridge Effected by Its Materials

Based on the spacial finite elements theory and combined with the bearing capacity of arch bridge, the steel pipe encased concrete arch bridge was divided into a series of spacial beam elements and truss elements to establish its finite elements dynamic equations. With these equations, the effection of steel pipe encased concrete arch bridge's dynamic performance by the materials characteristics of steel pipe and concrete was studied.