Abstract
This paper presents the flexural stress analysis by considering the shear lag phenomenon in the cable-stayed bridges with multi-cellular box girder. For the shear lag phenomenon in the flange plates of such box girders, the parabolic curves with second and fourth oredrs are assumed, then the corresponding variations of the effective width ratio are investigated and discussed by altering the various shear lag parameters. Based upon these parametric analyses, the additional moment due to shear lag is, moreover simplified to apply the flexural stress analysis of the cable-stayed bridges. Finally, this proposed method is demonstrated by the numerical examples of a cable-stayed bridge with flat multi-cellular box girder.
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