Retrofitting of Interior Slab-to-Column Connections for Punching Shear Using Different Techniques
Publication: Journal of Performance of Constructed Facilities
Volume 33, Issue 1
Abstract
This paper presents different strengthening techniques to eliminate some drawbacks associated with the available techniques. The considered strengthening techniques for the punching shear of RC slabs use the combined effect of internal single-leg stirrups and a double-skin steel assembly and properly anchored externally bonded glass fiber–reinforced polymer (EB-GFRP) sheets. Nine slab specimens divided into four groups are prepared and configured. It is found that the slab provided with properly anchored single-leg stirrups with a double-skin orthogonal steel assembly exhibits the most efficient technique among all considered techniques. This technique enables the slab to sustain a punching load about 1.69 times greater than that of the control unstrengthened slab. In addition, it triggers the slab to provide ductile punching failure showing strain hardening and softening plateaus. The experimental shear resistance of all strengthened slabs are compared with the design resistance stipulated by different design standards. It is concluded that the failure characteristics stipulated by German codes have the most rational results compared with those of the experimental findings.
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Published In
Journal of Performance of Constructed Facilities
Volume 33 • Issue 1 • February 2019
Copyright
©2018 American Society of Civil Engineers.
History
Received: Feb 4, 2018
Accepted: Jul 13, 2018
Published online: Oct 31, 2018
Published in print: Feb 1, 2019
Discussion open until: Mar 31, 2019
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