Dynamic Characteristics Analysis of the Deck Type Concrete-filled Steel Tubular Arch Bridge

This paper mainly studies the dynamic characteristics of Longqiao Bridge(a deck type concrete-filled steel tubular arch bridge)in Enshi,and analyzes the impact of main arch steel ratio,transverse support area,deck width on frequency of the deck type arch bridge.It could get that by analysis:the vibration of bridge deck and the main arch of the deck type concrete-filled steel tubular arch bridge is basically identical;and the main arch steel ratio and the cross area is not obvious influence on transverse stiffness;and the transverse stiffness of the bridge can be increased through the appropriate increasing the bridge width.