Seismic Performance of Strengthened Reinforced Concrete Beam-Column Joints Using FRP Composites
Publication: Journal of Structural Engineering
Volume 135, Issue 10
Abstract
Three nonseismically detailed interior reinforced concrete beam-column joints, namely, one eccentric and two concentric joints, strengthened with proposed fiber-reinforced polymer (FRP) wrapping configurations using glass fiber-reinforced polymer and carbon fiber-reinforced polymer strips and sheets, were tested under constant axial compression load and reversed cyclic loading which simulated low to moderate earthquake forces. Seismic performance of the strengthened beam-column joints in terms of their hysteresis response, stiffness, and energy dissipation capacity is evaluated and compared to those of the original and unstrengthened beam-column joints. Results indicate that applying strips at 45º on a flushed eccentric joint core and as cross bracing on the beam and confinement round the column is very effective. All specimens failed with gradual strength deterioration, bond degradation, and debonding of FRP sheets was observed near the joint core. The proposed strengthening schemes were found to be efficient and economical for mass repair or upgrading of nonseismically detailed structures.
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Acknowledgments
This research was made possible through the support of, and in collaboration with FYFE Asia Pte. Ltd. in Singapore. The significant assistance from Engr. Jeslin Quek and Mr. Ow Meng Chye of FYFE Asia are gratefully acknowledged.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 135 • Issue 10 • October 2009
Pages: 1177 - 1190
Copyright
© 2009 ASCE.
History
Received: Nov 7, 2007
Accepted: May 11, 2009
Published online: Sep 15, 2009
Published in print: Oct 2009
Notes
Note. Associate Editor: Yan Xiao
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