Shear strength and moment-shear interaction of steel-concrete composite beams: Experiments, numerical analyses, and design models

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Current structural codes do not address the shear strength and the moment-shear interaction in composite beams explicitly. The shear is commonly assumed to be resisted by the steel beam alone neglecting the contributions of the slab and the composite action. This paper presents an experimental and numerical study to cover this gap. Fourteen composite beams and one steel beam were tested in order to investigate the contribution of the concrete slab to the shear strength of a composite section and the moment-shear interaction in compact composite beams. A nonlinear finite element model was also developed to complement the experimental results. It was found that the moment capacity of a composite beam is significantly reduced when high shear forces are present. The reduction in moment capacity is accompanied by failure modes consisting of web buckling in the steel beam and brittle shear failures in the concrete slab, while the ductility is largely compromised. A significant contribution of the concrete slab to the shear capacity of the composite section was determined by the tests and verified by the numerical analyses. Based on the experimental and numerical results design models are proposed for the robust and economical design of compact composite beams under high shear forces, and for incorporation into design standards.

Original languageEnglish
Title of host publication11th International Conference on Steel Space and Composite Structures
PublisherCI-Premier Pte Ltd
Pages287-296
Number of pages10
ISBN (Print)9789810727352
Publication statusPublished - 2012
Event11th International Conference on Steel Space and Composite Structures 2012 - Qingdao, China
Duration: 12 Dec 201214 Dec 2012

Conference

Conference11th International Conference on Steel Space and Composite Structures 2012
CountryChina
CityQingdao
Period12/12/1214/12/12

Keywords

  • Composite beams
  • Finite element models
  • Moment-shear interaction
  • Shear loading

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Electronic, Optical and Magnetic Materials

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  • Cite this

    Vasdravellis, G., & Uy, B. (2012). Shear strength and moment-shear interaction of steel-concrete composite beams: Experiments, numerical analyses, and design models. In 11th International Conference on Steel Space and Composite Structures (pp. 287-296). CI-Premier Pte Ltd.