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THE ANALYSIS OF THE SHEAR-LAG EFFECT OF CONTINUOUS CURVED BOX GIRDER BRIDGES AND RESEARCH ON PRACTICAL CALCULATING METHODS

Peng Da-wen, Zhong Wang

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Abstract

Using space shell finite element method, the authors present an analysis of the shear-lag effect laws of continuous curved box girder bridges and the influence of main structure parameters on the shear-lag effect. The accuracy of the calculating method is verified by the model test and illustrative example analysis. Practical shear-lag coefficients for the reference of engineering designs are presented as well as the tables of the ratio of box girder flange effective width. This study offers a basis for perfecting the contents in specifications related to the calculation of continuous curved box girder shear-lag coefficients and effective distribution width.

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What this paper is about

Using space shell finite element method, the authors present an analysis of the shear-lag effect laws of continuous curved box girder bridges and the influence of main structure parameters on the shear-lag effect. The accuracy of the calculating method is verified by the model test and illustrative example analysis. Practical shear-lag coefficients for the reference of engineering designs are presented as well as the tables of the ratio of box girder flange effective width. This study offers a basis for perfecting the contents in specifications related to the calculation of continuous curved box girder shear-lag coefficients and effective distribution width.

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Available abstract

Using space shell finite element method, the authors present an analysis of the shear-lag effect laws of continuous curved box girder bridges and the influence of main structure parameters on the shear-lag effect. The accuracy of the calculating method is verified by the model test and illustrative example analysis. Practical shear-lag coefficients for the reference of engineering designs are presented as well as the tables of the ratio of box girder flange effective width. This study offers a basis for perfecting the contents in specifications related to the calculation of continuous curved box girder shear-lag coefficients and effective distribution width.

Key concepts: Flange, Lag, Structural engineering, Box girder, Shear (geology), Girder, Engineering, Finite element method

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