Punching Shear Characterization of Steel Fiber-Reinforced Concrete Flat Slabs

• Published in: HighTech and innovation journal Vol. 3; no. 4; pp. 483 - 490
• Main Authors: Mohammed, Abbas H., Mubarak, Huda M., Hussein, Ali K., Abulghafour, Taymour Z., Nassani, Dia Eddin
• Format: Journal Article
• Language: English
• Published: Ital Publication 01.12.2022
• Subjects: concrete structures; crack; flat slab; punching shear resistance; steel fiber reinforced concrete
• ISSN: 2723-9535; 2723-9535
• DOI: 10.28991/HIJ-2022-03-04-08

Punching shear failure in thin slabs under concentrated loads can cause shear stresses near columns. The use of steel fiber is a practical way to improve a slab-column connection's punching strength and deformation capacity. In this study, the capacity and behavior of steel fiber-reinforced concrete flat slabs are examined under punching shear force. Ten small-scale flat slabs were tested, eight of which had steel fiber and two without. Two parameters are studied in this paper, which are the fiber volume ratio (from 0% to 2%) and the stub column load shape (circle and square). The test results include the concrete compressive strength, crack patterns, punching shear, and load-defection behavior of the slabs. Based on the experimental results, it was found that the punching shear capacity of slabs with steel fiber (S5) increased by 21.8% compared to slabs without steel fiber (S1), and the slabs with steel fiber had more ductility compared to the slabs without fiber. Doi: 10.28991/HIJ-2022-03-04-08 Full Text: PDF