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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Erdil, Barış; Akyüz, Uğurhan; Yaman, İsmail Özgür (2012-12-01)
In this study, an experimental program was established to understand the behaviour of FRP-confined low strength cylindrical and square-section concrete columns under temperature changes. The experimental program was divided into four groups. First group of specimens were kept under room temperature and used as control specimens. In the second group, specimens were exposed to predetermined heating-cooling cycles in a specially designed environmental test chamber. Third group of specimens were placed in water...
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Ozturk, H; Unal, E (2001-06-22)
In this paper, the broken zone developing, around a circular mine shafts and lining pressure is estimated by integrating the results of numerical analysis and the "rock-load height" equation derived from empirical analysis. During numerical modelling studies, the computer program FLAC(2D) was utilized. In order to estimate equivalent Mohr failure Envelope from the generalised Hoek Brown failure criterion, a new FISH function was written within FLAC(2D). Parametric studies were carried out by considering mRM...
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Talefirouz, D.; Çokça, Erdal; Omer, J. (2016-01-01)
This paper describes an experimental investigation on the use of ground granulated blast furnace slag (GGBFS) and lime as stabilizers for cement-bentonite (CB) slurry used in constructing vertical barrier walls. The primary objective is to develop a blended material, which can reduce the permeability and also enhance the strength of CB slurry walls with a shortened curing time. Mixtures comprising various proportions of cement, bentonite, GGBFS, and lime were prepared and tested for particle size distributi...
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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: