Investigation of Design Flexural Capacity of Steel - Concrete Composite Girders Accounting for Bridge High-Performance Steel

Abstract

In this stydy, the positive bending moment capacity of steel - concrete composite girders was examined through parametric studies employing elasto-plastic finite element analyses. The web slenderness limits based on section classification for homogeneous and hybrid girders with bridge high-performance steel were explored. Besides, the effects of initial bending moment due to unshored construction method on the web slenderness limit were also investigated. It was shown that the noncompact web slenderness limits in conventional design standards were conservative for composite sections. Many sections which are classified as slender girders by current specifications demonstrate sufficient flexural capacity as noncompact.