ABSTRACT
Tubular flange composite girders use concrete-filled steel tubes as upper flanges instead of traditional steel plates for I-shape steel girders, which could fully take advantage of material properties. It can be widely used as viaducts in cities and rural areas. This paper analyzed dynamic characteristics and factors influencing the performance of the pilot bridge, which designed as a large span tubular flange composite girder bridge by using finite element analysis software ABAQUS and standardized computation. Firstly, the tubular flange composite girder model and equivalent I-shape steel girder model was built and analyzed in ABAQUS. Then the dynamic characteristics of these two models, with the verification of fundamental frequencies by using simplified equations from General Code for Design of Highway Bridges and Culverts (JTG D60-2015), are compared and analyzed. Besides, the dynamic performance of the composite girders is studied under various configurations. Finally, the conclusion could expand to general applications and dynamic analysis of tubular flange composite girder bridges.
