Article
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Post-Earthquake Strengthening of RC Coupling Beams with GFRP Wrapping: Experimental Investigation
Version 1
: Received: 25 July 2023 / Approved: 26 July 2023 / Online: 26 July 2023 (10:41:49 CEST)
A peer-reviewed article of this Preprint also exists.
Eser, N.; Töre, E.; Bal, İ.E. Post-Earthquake Strengthening of RC Coupling Beams with GFRP Wrapping: Experimental Investigation. Materials 2023, 16, 6040. Eser, N.; Töre, E.; Bal, İ.E. Post-Earthquake Strengthening of RC Coupling Beams with GFRP Wrapping: Experimental Investigation. Materials 2023, 16, 6040.
Abstract
Our research aims to address the urgent need for retrofitting measures to enhance the resilience of damaged coupling beams in real-life scenarios. We conducted a series of tests on scaled-down prototype coupling beams, carefully adhering to similarity theory requirements to ensure accurate representation.
The test results showed that the chord rotation capacities of different specimens with the same diagonal bundle varied significantly due to the difference in the confinement levels. The specimens with lower level of confinement were found to have less displacement capacity. When the specimens were strengthened by wrapping with GFRP after damage, it was observed that the increase in confinement level significantly increased the chord rotation capacities of all specimens. In addition, in the tests before the strengthening, the elongation behavior of the specimens is observed until the damage development reaches approximately 2% chord rotation. With the in-crease in chord rotation, the elongation behavior of the specimens stops with increasing damage and then shortening behavior is observed. After retrofitting, it was observed that the axial elongation continued in a limited manner depending on the location and size of the concrete separated from the beam core in the case of collapse before strengthening, and then the beam showed a shortening behavior predominantly.
After strengthening studies, our findings contribute valuable insights into the behavior and performance of damaged coupling beams, emphasizing the potential of urgent GFRP wrapping as a viable solution to enhance the seismic resilience of middle- and high-class buildings with structural walls after seismic events.
Keywords
coupling beams; GFRP; preserve seismic performance; urgent strengthening; post-earthquake wrapping
Subject
Engineering, Civil Engineering
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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