Mechanical Characteristics & Shear Lag Analysis of Space Composite Truss Bridge

Truss composite girder bridge includes hybrid truss girder bridge and composite truss girder bridge,while composite truss girder bridge refers to structure which using upper and lower chord of steel truss girder and concrete deck to resist loading together.A 3D finite element model for a space composite truss girder bridge of Fenggan Highway Punan Canal is established to analyze the mechanical characteristics of the bridge.Effective widths are calculated through deck stress distribution,and relationship between axial force of web members and deck's shear lag phenomenon is revealed.This paper will provide reference for the design of such composite truss girder bridge.