Punching shear behavior of concrete flat plate slab reinforced with carbon fiber reinforced polymer rods |
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| Affiliation: | 1. Harbin Institute of Technology, Department of Civil Engineering, Harbin 150001, PR China;2. Hanyang University, Department of Architectural Engineering, Kyunggi-Do 425-791, Republic of Korea;1. Faculty of Engineering, Aswan University, 81542 Aswan, Egypt;2. School of Mechanical, Aerospace and Civil Engineering, University of Manchester, PO Box 88, Sackville Street, Manchester, UK;1. Ege University, Faculty of Engineering, Civil Engineering Department, 35040 Bornova, İzmir;2. Gazi University, Faculty of Technology, Civil Engineering Department, 06500 Teknikokullar, Ankara;1. Composite Construction Laboratory (CCLab), École Polytechnique Fédérale de Lausanne (EPFL), Station 16, 1015 Lausanne, Switzerland;2. Institute for Civil and Environmental Engineering (IBU), HSR Rapperswil University of Applied Sciences, Oberseestrasse 10, 8640 Rapperswil, Switzerland;1. Department of Civil Engineering, University of Shahid Ashrafi Isfahani, Isfahan, Iran;2. Department of Civil Engineering, Isfahan University of Technology (IUT), Isfahan, Iran;3. Department of Civil Engineering, Nagoya University, Nagoya, Japan;1. Department of Civil Engineering at the University of Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada;2. Innovative FRP Materials for Concrete and Civil Structures, Department of Civil Engineering, University of Sherbrooke, Quebec J1K 2R1, Canada |
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| Abstract: | Flat plate slab system is widely adopted by engineers as it provides many advantages . The system can reduce the height of the building, provide more flexible spatial planning due to no beams present, and further reduce the material cost. However, the main problem in practice is the brittle failure of flat plate slab under punching shear. In this paper, the punching shear behavior has been studied and an experimental work using carbon fiber reinforced polymer (CFRP) rods as shear reinforcement has been conducted in flat plate slab system.This exploratory research is to study the behavior of the flat plate slab with CFRP-rods reinforced in punching shear zone under constant gravity load and lateral displacements in a reversed cyclic manner. Three specimens of interior column-slab connection specimens were tested including one standard specimen without any shear reinforcement, the second one reinforced with CFRP-rods and the third one reinforced with stud rails as the reference to the second one. The slabs were 3000 mm long × 2800 mm wide × 150 mm deep, and were simply supported at four corners. Punching shear failure occurred for the standard specimens at a lateral drift-ratio, lateral drift divided by the length of vertical member, of approximately 5%. The specimen reinforced by CFRP-rods had significant flexural yielding and sustained deformations up to a drift ratio of approximately 9% without significant losses of strength, and punching shear was not observed in this specimen. The displacements increased up to 1.79 times larger than that of the standard specimen. And this specimen showed 42% superior ductile performance than the standard specimen and even the same capability with the stud-rail reinforced specimen. The results of the experiment indicate that CFRP-rods using in the flat slab has a better foreground. |
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