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Abstract
The shear buckling failure and strength of a web panel stiffened by stiffeners with corrosion damage were examined according to the degree of corrosion of the stiffeners, using the finite element analysis method. For this purpose, a plate girder with a four-panel web girder stiffened by vertical and longitudinal stiffeners was selected, and its deformable behaviors and the principal stress distribution of the web panel at the shear buckling strength of the web were compared after their post-shear buckling behaviors, as well as their out-of-plane displacement, to evaluate the effect of the stiffener in the web panel on the shear buckling failure. Their critical shear buckling load and shear buckling strength were also examined. The FE analyses showed that their typical shear buckling failures were affected by the structural relationship between the web panel and each stiffener in the plate girder, to resist shear buckling of the web panel. Their critical shear buckling loads decreased from 82% to 59%, and their shear buckling strength decreased from 88% to 76%, due to the effect of corrosion of the stiffeners on their shear buckling behavior. Thus, especially in cases with over 40% corrosion damage of the vertical stiffener, they can have lower shear buckling strength than their design level.
Highlights
In steel plate girder bridges with more than 50–70 years’ service period, severe corrosion damaged structural members have been found near their supports from their corrosive environmental condition, such as higher humidity caused by poor air circulation, dust deposition, and rain water or antifreeze penetration from drainage type expansion joints [1,2,3]
Several studies on shear buckling problem with local corrosion damage in web panel were carried out, since corrosion damage of the web panel is related to decrease in the shear buckling strength and shear failure behavior [2, 3, 13,14,15,16,17]
Evaluation of Shear Buckling Strength of Web Panel Related to Corroded Stiffener
Summary
In steel plate girder bridges with more than 50–70 years’ service period, severe corrosion damaged structural members have been found near their supports from their corrosive environmental condition, such as higher humidity caused by poor air circulation, dust deposition, and rain water or antifreeze penetration from drainage type expansion joints [1,2,3]. For a steel plate girder bridge, vertical and longitudinal stiffeners are basically installed to improve the shear buckling strength of their web panel. In case of a corroded plate girder, sectional damage of stiffeners affected by corrosion damage can relate to shear buckling behaviors of the web panel. If all cases were considered, the corrosion damage effect of a stiffener on the shear buckling behaviors of a plate girder is not clear. A plate girder with a four-panel web panel stiffened by vertical and longitudinal stiffeners was selected After their post-shear buckling behaviors, their shear buckling failures were compared, as well as their change in shear buckling strength. 90 200 stiffener of the web panel on the shear buckling failure was evaluated
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