Flexural Behavior of Steel–Concrete Composite Beams Considering Interlayer Slip
Publication: Journal of Structural Engineering
Volume 145, Issue 9
Abstract
Steel–concrete composite bridges, which combine the excellent tensile properties of steel beams and the compressive properties of concrete slabs, are widely used worldwide because of their superior mechanical properties, convenience of construction, and economic efficiency. Although various analysis tools have been presented for the design and evaluation of steel–concrete composite beams, there is still no effective tool that considers the effect of interlayer bonds on the flexural behavior of composite beams. This study developed an engineer-friendly mechanical model to analyze the flexural behavior of composite beams with consideration of the interlayer slip between the steel and concrete. In the model, the shear studs in the composite beams were simulated using nonlinear springs. The mechanical model was validated using experimental results. The model was used to predict the interlayer slip and deflection of composite beams under different loading levels. The analysis results indicated that neglecting interlayer slip leads to underestimation of the deflection of composite beams by as much as 27%–35%.
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Acknowledgments
This study was funded by the National Natural Science Foundation of China (Grant Nos. 51578455, 51878561, 51778533, 51378431, and 51408506), the Science and Technology Program of Hubei Transportation Department (Grant No. 2017-538-2-4), the Fundamental Research Funds for the Central Universities (Grant No. 2682014CX078), and the National Science and Technology Support Program of China (Grant No. 2011BAG07B03).
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Published In
Journal of Structural Engineering
Volume 145 • Issue 9 • September 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Aug 20, 2018
Accepted: Jan 15, 2019
Published online: Jun 24, 2019
Published in print: Sep 1, 2019
Discussion open until: Nov 24, 2019
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