Use of fiber-reinforced polymers in slab-column connection upgrades

The results of an experimental program on punching shear-strengthening of reinforced concrete slab-column connections using carbon fiber-reinforced polymers (CFRPs) are presented ill this paper. Externally installed CFRP stirrups serving as shear reinforcement were used as a strengthening technique. The effectiveness of different patterns, detailing, and various amounts of CFRP for strengthening were studied. It was found that the proposed method resulted in punching shear capacity increases up to 60% relative to the specimen without any strengthening. In addition, displacement ductility and postpunching resistance of the strengthened specimens increased, resulting in a more ductile failure mode than that of the control specimen. A design method based oil ACI 318-02 expressions is also presented for this innovative use of CFRP for strengthening slab-column connections.


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Unal, Mehmet; Burak Bakır, Burcu (2012-02-10)
In this analytical study numerous prior experimental studies on reinforced concrete beam-to-column connections subjected to cyclic loading are investigated and a database of geometric properties, material strengths, configuration details and test results of subassemblies is established. Considering previous experimental research and employing statistical correlation method, parameters affecting joint shear capacity are determined. Afterwards, an equation to predict the joint shear strength is formed based o...
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ERDOĞAN, HAKAN; Binici, Barış; Ozcebe, Guney (2011-07-01)
This study presents experimental and analytical research that focused on the behaviour of carbon-fibre-reinforced polymer (CFRP)-strengthened flat-slab specimens for punching shear enhancement. Seven 0.75-scale flat-slab specimens representing interior slab-column connections with different column aspect ratios varying from 1 to 3 were tested. The results revealed that increasing column rectangularity had a detrimental effect on column punching strength of all specimens. A strength increase of at least 30% ...
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Ozturk, H; Unal, E (2001-06-22)
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Citation Formats
B. Binici, “Use of fiber-reinforced polymers in slab-column connection upgrades,” ACI STRUCTURAL JOURNAL, pp. 93–102, 2005, Accessed: 00, 2020. [Online]. Available: