Textile-Reinforced Mortar versus FRP as Strengthening Material for Seismically Deficient RC Beam-Column Joints
Publication: Journal of Composites for Construction
Volume 15, Issue 6
Abstract
In this paper, efficiency and effectiveness of textile-reinforced mortars (TRM) on upgrading the shear strength and ductility of a seismically deficient exterior beam-column joint has been studied. The results are then compared with that of carbon fiber-reinforced polymer (CFRP) and glass fiber-reinforced polymer (GFRP)-strengthened joint specimens. Five as-built joint specimens were constructed with nonoptimal design parameters (inadequate joint shear strength with no transverse reinforcement) representing an extreme case of preseismic code design construction practice of joints and encompassing the vast majority of existing beam-column connections. Out of these five as-built specimens, two specimens were used as baseline specimens (control specimens) and the other three were strengthened with TRM, CFRP, and GFRP sheets, respectively. All five subassemblages were subjected to quasi-static cyclic lateral load histories to provide the equivalent of severe earthquake damage. The response histories of control and strengthened specimens were then compared. The test results demonstrated that TRM can effectively improve both the shear strength and deformation capacity of seismically deficient beam-column joints to an extent that is comparable to the strength and ductility achieved by well-established CFRP, and GFRP-strengthening of joints.
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Acknowledgments
The writers gratefully acknowledge the support provided by the Specialty Units for Safety and Preservation of Structures and the MMB Chair for Research and Studies in Strengthening and Rehabilitation of Structures at the Department of Civil Engineering, King Saud University.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 15 • Issue 6 • December 2011
Pages: 920 - 933
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Nov 2, 2010
Accepted: Apr 12, 2011
Published online: Apr 14, 2011
Published in print: Dec 1, 2011
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