New Methods to Resisting Punching Shear Stress in Reinforced Concrete Flat Slabs

Eid, Fatma M.; Magdy, Tayel; Ahmed, Ebada

doi:10.14741/ijcet/v.8.2.19

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…Many researchers have studied the punching shear behavior of reinforced concrete flat slabs [3][4][5][6]. The punching shear strength and deformation capacity are strongly influenced by the type and characteristics of the shear reinforcing system [7][8][9][10][11][12][13]. The slabs punching shear reinforcing system are:…”

Section: Introductionmentioning

confidence: 99%

Resistance of Punching Shear Strength of RC Flat Slabs According to Laboratory and Finite Element Analysis Study Comparison of International Codes

Habeb¹,

Mahmoud²,

Sherif

et al. 2022

Engineering Research Journal

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Section: Introductionmentioning

confidence: 99%

Resistance of Punching Shear Strength of RC Flat Slabs According to Laboratory and Finite Element Analysis Study Comparison of International Codes

Habeb¹,

Mahmoud²,

Sherif

et al. 2022

Engineering Research Journal

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Punching Shear Strength Improvement of Flat Slabs using Polypropylene Fibers

Alkhudery

Aljnabi

2021

IOP Conf. Ser.: Mater. Sci. Eng.

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The punching shear failure at the region around the column is considered the most dangerous type of failure in the flat slab system, causing an instantaneous collapse of the buildings. It is a brittle failure mode that happens suddenly without any warning. Recently many techniques were introduced by researchers to avoid shear punching failure and enhance shear punching resistance of flat slab. Improving the mechanical properties of concrete is a powerful approach line using polypropylene fibers (PF) in concrete in which details are presented in this paper. Twelve slabs were made with dimensions of (1000*1000) mm, and 100mm in thickness. The flexural reinforcement was the same for all models; for the upper layer was (6ϕ6), while the lower layer was (10ϕ12) without shear reinforcement. The factors studied in this investigation involve the polypropylene fibers quantity, compressive strength value. The results showed a noticeable improvement in punching shear strength when adding (PF%=1%) by cement weight. However, the impact of polypropylene fibers was negligible when adding a ratio greater than 2%, and it was also observed that the failure changed from a brittle failure of non-polypropylene fibers models to a ductile failure in slabs containing polypropylene fibers. The failure cracks in a slab with polypropylene fibers are tiny and less in number than the NC slab. This is because fibers increase the internal bonding of the concrete material component. Also, increasing the ratio of polypropylene fibers reduced the perimeter and area of the punching shear region while the failure angle slightly increased.

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New Methods to Resisting Punching Shear Stress in Reinforced Concrete Flat Slabs

Abstract: Punching shear failure is a major problem encountered in the design of reinforced concrete flat slabs.

Cited by 2 publications

References 3 publications

Resistance of Punching Shear Strength of RC Flat Slabs According to Laboratory and Finite Element Analysis Study Comparison of International Codes

Resistance of Punching Shear Strength of RC Flat Slabs According to Laboratory and Finite Element Analysis Study Comparison of International Codes

Punching Shear Strength Improvement of Flat Slabs using Polypropylene Fibers

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