SIZE EFFECT ON PUNCHING SHEAR BEHAVIOR OF SLAB-COLUMN ASSEMBLY MADE FROM ENGINEERING CEMENTITIOUS COMPOSITE MATERIALS WITH POLYVINYL ALCOHOL FIBERS

Abstract

Engineering Cementitious Composite (ECC) materials with PolyVinyl Alcohol (PVA) fibers are employed to investigate the effect of the ductile matrix on the behavior of flat plate-column connection. Totally four slabs are cast and tested, three of PVA-ECC slabs are compared to control slab of normal concrete. The thickness of the slabs used was variable (50, 60 and 80 mm) in order to investigate the effect of the size, and keeping the other size is constant (500 × 500 mm). All four slabs are reinforced with same conventional reinforcement ratio. The results showed that in the ductility of the slabs made from PVA-ECC are significantly enhanced compared with the normal concrete slab, this ductility improvement decrease with increasing the slab thickness, and more over the shear stress in the specific location is reducing with increasing the slab thickness

References

1. ACI318-14. (2014) Building Code Requirements for Structural Concrete (ACI 318M-14) and Commentary. American Concrete Institute, Farmington Hills, MI, ACI 318,-14.
2. Abo Altemen, A.A., Arna'ot, F. H., Abbass, Ahmmad. A.& OZAKCA ,M. (2017). Punching Shear Behavior of Small SFRC Flat Plate. Proceeding ICOCEE Cappadocia 2017:2nd International Conference on Civil and Environmental Engineering. Nevsehir, TURKEY, 891-901.
3. Bazant, Z. P. & Cao, Z. (1987). Size Effect in Punching Shear Failure of Slabs. ACI Structural, Title no. 84-S6, 44-53.
4. Brikle, G. & Dilger,W. H. (2008). Influence of Slab Thickness on Punching Shear Strength. ACI Structural Journal, 105(2), 180-188.
5. Broms, C. E. (2005). Concrete Flat Slabs and Footings Design Method for Punching and Detailing for Ductility. Royal Institute of Technology, Stockholm, Ph.D Thesis.
6. DIN1045-2. (2008). Concrete reinforced and pre-stressed concrete structures- Part 1: Design and construction, August 2008.
7. EN1992-1-1.(2004). Eurocode 2: Design of concrete structures - Part 1-1: General rules and rules for buildings. CEN, Brussels.
8. Guandalini, S., Burdet, O.L. & Muttoni, A. (2009). Punching Tests of Slabs with Low Reinforcement Ratios. ACI Structural Journal, 106(1), 87-95.

9. Li, V.C. (2007). Engineered Cementitious Composites (ECC) – Material, Structural, and Durability Performance. In Concrete Construction Engineering Handbook, New York: CRC Press,.
10. Mutton, A. & Schwartz, J. (1991). Behavior of Beams and Punching in Slabs without Shear Reinforcement. IABSE Colloquium, 62, 703-708.
11. Regan, P. E. (1981). Behavior of Reinforced Concrete Flat Slabs. CIRIA Report 89
12. (Construction Industry Research and Information Association), Press London.
13. Shehata, I. (1990). Simplified Model For Estimating The Punching Resistance Of Reinforced Concrete Slabs. Materials and Structures/ Materiaux et Constructions, 23, 364-371.