Influence of Web Ratio on Strength and Displacement Characteristics of a Steel Corrugated Web Plate Girder
The influence of web ratio (ratio of flat to inclined web length portion) in a corrugated web plate girder on the strength and deflection characteristics is presented in this paper. Three corrugated web plate girders with web angles of inclination α=300, 450and 600 are considered in this study. In each corrugated web plate girder, the web ratio is varied from 0.2 to 1, in the increment of 0.2. These three corrugated web plate girders with web angles of inclination α=300, 450and 600 and with their web-ratios are analyzed using FEM software for stresses and central deflections. A uniformly increasing central point load distributed uniformly across flange width at mid span is considered for the analysis. Load verses mid span deflection curves for various load increments and web ratios are plotted for all three girders. Stresses verses web ratios are also plotted. Results of all the three girders considered here show that corrugated web plate girder with α=600 with web ratio 0.4, produces least equivalent (Von Mises) stress and least deflection at mid span. Therefore corrugated web plate girder with α=600 and web ratio 0.4 is considered to be superior corrugated web profile compare to remaining corrugated web profiles of plate girders with all web ratios considered here.
Keywords-Corrugated web plate girder, web ratio, web geometry, finite element method