Behaviour and design of composite beams subjected to sagging bending and axial compression
| Autor: | Brendan Kirkland, Brian Uy, George Vasdravellis, Ee Loon Tan |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
business.industry Composite number Metals and Alloys Building and Construction Structural engineering Bending Compression (physics) Moment (mathematics) Shear (sheet metal) Nonlinear system Mechanics of Materials Ultimate tensile strength business Civil and Structural Engineering Parametric statistics |
| Zdroj: | Journal of Constructional Steel Research. 110:29-39 |
| ISSN: | 0143-974X |
| DOI: | 10.1016/j.jcsr.2015.03.010 |
| Popis: | This paper presents an experimental and numerical study on the ultimate strength of steel–concrete composite beams subjected to the combined effects of sagging (or positive) bending and axial compression. Six full-scale composite beams were tested experimentally under sagging bending and increasing levels of axial compression. A nonlinear finite element model was also developed and found to be capable of accurately predicting the nonlinear response and the combined strength of the tested composite beams. The numerical model was then used to carry out a series of parametric analyses on a range of composite sections commonly used in practice. It was found that the sagging moment resistance of a composite beam is not reduced under low-to-moderate axial compression, while it significantly deteriorates under high axial compression. Sectional rigid plastic analyses confirmed the experimental results. The moment–axial force interaction does not change significantly between full and partial shear connection. Based on the experimental and numerical results, a sagging moment–axial compression interaction law is proposed which will allow for a more efficient design of composite beams. |
| Databáze: | OpenAIRE |
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