Journal of Structural Engineering · 1988 · 45 citations · 3 references
EngineeringCivil EngineeringMaterials EngineeringStructural AnalysisStructural EngineeringStructural MaterialsBeam AnalysisBending Of BeamsComposite MaterialsStructural DesignStructural LoadsStructural MechanicsComposite Beam AnalysisConnectorsShear BehaviorShear Connector BehaviorShear FailureShear Failure MechanismsShear Strength AnalysisShear Strength Of Slabs
Composite beams with web openings use ribbed slabs and formed steel decks, where ribs can be perpendicular or parallel to the steel section and the concrete slab significantly contributes to flexural and shear strength. The study investigates how moment‑shear ratio, shear‑connector quantity and placement, deck orientation, and deck thickness affect composite beam performance with web openings. The authors conducted fifteen full‑scale failure tests on composite beams with web openings, varying moment‑shear ratio, shear‑connector configuration, deck orientation, and deck thickness. Peak loads are governed by slab failure, with rib failure around shear connectors in transverse‑rib slabs and longitudinal shear failure in longitudinal‑rib slabs, and opening strength rises with increased shear‑connector capacity above and adjacent to the opening, informing design implications.
Fifteen tests to failure are performed on full‐scale composite beams with web openings. The beams have ribbed slabs with formed steel deck. The ribs are perpendicular or parallel to the steel section. The etfects of moment‐shear ratio, quantity and placement of shear connectors, deck orientation, and deck thickness are studied. The concrete slab contributes significantly to both the flexural and shear strength of beams at web openings. Peak loads are governed by failure of the slab. Rib failure around shear connectors occurs in slabs with transverse ribs, while longitudinal shear failure occurs in slabs with longitudinal ribs. Strength at an opening increases as the shear‐connector capacity above the opening and between the opening and the support increases. The implications for design are discussed.
3