Publication: Remediation of punching shear failure using glass fiber reinforced polymer (Gfrp) rods
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Issued Date
2021
Resource Type
Language
eng
File Type
application/pdf
ISSN
20734360
Other identifier(s)
2-s2.0-85111579934
Rights Holder(s)
Scopus
Bibliographic Citation
Polymers. Vol 13, No.14 (2021)
Suggested Citation
Yooprasertchai E., Dithaem R., Arnamwong T., Sahamitmongkol R., Jadekittichoke J., Joyklad P., Hussain Q. Remediation of punching shear failure using glass fiber reinforced polymer (Gfrp) rods. Polymers. Vol 13, No.14 (2021). doi:10.3390/polym13142369 Retrieved from: https://hdl.handle.net/20.500.14740/6099
Abstract
The results of an experimental program on shear-strengthening of flat slabs using Glass Fiber Reinforced Polymer (GFRP) rods are presented. A total of seven specimens were tested under an upward concentric monotonic loading until failure. One specimen served as a control and was tested without any modification. The remaining six specimens were strengthened with post-in-stalled GFRP rods in single (SG), double (DB), and radial (RD) patterns within shear critical parameters around the centric column. The results of this experimental study suggest that GFRP rods are capable of enhancing both the peak load and deformation capacity. Furthermore, brittle failure associated with punching shear failure was successfully avoided by all strengthening patterns. Of all of the patterns, the RD pattern resulted in maximum peak load increase and corresponding deformation capacity while the lowest bound was created by the SG pattern. The results suggested that SG, DB and RD patterns enhanced ultimate loads up to 9.1, 11.3 and 15.7% while corresponding deflections increased up to 109, 136 and 154%. Strain measurement on flexural reinforcement suggested that all strengthened specimens were able to withstand higher longitudinal strains than yield. It was further shown that reducing the spacing between the GFRP rods efficiently enhanced peak loads, nevertheless, neither this change was proportional, nor did it result in an enhanced energy dissipation capacity. In the end, recommendations of American Concrete Institute (ACI) for the shear strength of two-way systems were modified to incorporate the contributions from GFRP rods. The results indicate that the proposed analytical approach provides an excellent match with the experimental results. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Subject(s)
Columns (structural)
Deformation
Energy dissipation
Failure (mechanical)
Glass fibers
Shear strength
Strain
American Concrete Institute
Deformation capacity
Energy dissipation capacities
Experimental program
Flexural reinforcement
Glass fiber reinforced polymer
Longitudinal strain
Shear strengthening
Fiber reinforced plastics
Deformation
Energy dissipation
Failure (mechanical)
Glass fibers
Shear strength
Strain
American Concrete Institute
Deformation capacity
Energy dissipation capacities
Experimental program
Flexural reinforcement
Glass fiber reinforced polymer
Longitudinal strain
Shear strengthening
Fiber reinforced plastics