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Steel and Composite Structures Volume 33, Number 1, October10 2019 , pages 143-162 DOI: https://doi.org/10.12989/scs.2019.33.1.143 |
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Numerical analysis of stainless steel-concrete composite beam-to-column joints with bolted flush endplates |
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Yuchen Song, Brian Uy and Jia Wang
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| Abstract | ||
| A number of desirable characteristics concerning excellent durability, aesthetics, recyclability, high ductility and fire resistance have made stainless steel a preferred option in engineering practice. However, the relatively high initial cost has greatly restricted the application of stainless steel as a major structural material in general construction. This drawback can be partially overcome by introducing composite stainless steel-concrete structures, which provides a cost-efficient and sustainable solution for future stainless steel construction. This paper presents a preliminary numerical study on stainless steel-concrete composite beam-to-column joints with bolted flush endplates. In order to ensure a consistent corrosion resistance within the whole structural system, all structural steel components were designed with austenitic stainless steel, including beams, columns, endplates, bolts, reinforcing bars and shear connectors. A finite element model was developed using ABAQUS software for composite beam-to-column joints under monotonic and symmetric hogging moments, while validation was performed based on independent test results. A parametric study was subsequently conducted to investigate the effects of several critical factors on the behaviour of composite stainless steel joints. Finally, comparisons were made between the numerical results and the predictions by current design codes regarding the plastic moment capacity and the rotational stiffness of the joints. It was concluded that the present codes of practice generally overestimate the rotational stiffness and underestimate the plastic moment resistance of stainless steel-concrete composite joints. | ||
| Key Words | ||
| steel-concrete composite structure; stainless steel; beam-to-column joint; bolted flush endplate connection; finite element analysis; parametric study; design code | ||
| Address | ||
| School of Civil Engineering, The University of Sydney, Sydney, NSW 2006, Australia. | ||