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This paper presents a design method of the web slenderness ratio and the corresponding rigidity of longitudinal stiffeners in the curved plate girders. The elastic non-linear behaviors of the curved web panels with/without longitudinal stiffeners subjected to pure bending are inquired by means of analysis using the up-dated lagrangian and an isoparametric finite element method. Based upon these analysis, a required slenderness ratio of web panels is investigated by setting a limit state concerning the maximum out-of-plane deflections and bending stresses. In order to evaluate the strength of the longitudinal stiffeners in the ultimate limit state of curved web panel, a curved beam-column model is proposed, then a design method for the required relative stiffness of the stiffeners is, moreover, recomended by adopting interaction curve of this beam-column model.

A STUDY ON ANALYSIS AND DESIGN OF WEB PLATE IN CURVED GIRDER BRIDGES SUBJECTED TO BENDING