Comprehensive FE Study of the Hysteretic Behavior of Steel–Concrete Composite and Noncomposite RWS Beam-to-Column Connections
Publication: Journal of Structural Engineering
Volume 144, Issue 9
Abstract
This paper investigates the behavior of reduced web section (RWS) steel–concrete composite (SCC) beam-to-column connections with circular web openings through a comprehensive finite element (FE) analysis following experimental and computational studies. Results showed that the presence of a circular web opening is effective to move the plastic hinge away from the column shear panel zone and the main connection components including the welding beam-column welding area, and hence, significantly improve the ductility and energy dissipation of the connection without critically affecting its capacity. The composite action was not considered in the literature to account for the severest case (slab acts as load only) in terms of load carrying capacity. However, this study proves that the composite effect has a decisive role in the calculation of the ductility and rotational capacity, and if not considered may result in an overestimated ductile behavior. On the other hand, in cases where composite action is not provided, depending on the particular flooring system, noncomposite steel connections may be considered where the ductility and energy dissipation gains are definitely higher but the load carrying capacity is lower. This paper establishes the comparison between composite and noncomposite connections and concludes that the contribution of the composite action to the load carrying capacity is higher with the increase of the beam web opening diameter. Therefore, the calculated negative load carrying capacity tends to be very conservative if the composite effect is neglected when a large opening diameter is used.
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Acknowledgments
The first author would like to express his gratitude to Japan International Cooperation Agency (JICA) for their financial support to follow the Earthquake Engineering Disaster Mitigation course. The second author would like to a knowledge the contribution of the EPSRC DTG CASE support (EP/L504993/1) and the Institution of Structural Engineers (IStructE) for their continuous technical and financial support.
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Published In
Journal of Structural Engineering
Volume 144 • Issue 9 • September 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jun 28, 2017
Accepted: Feb 28, 2018
Published online: Jun 28, 2018
Published in print: Sep 1, 2018
Discussion open until: Nov 28, 2018
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