Punching Shear Behavior of Glass Fiber-Reinforced Polymer–Reinforced Concrete Slab-Column Interior Connections

Hussein, Amgad; El-Salakawy, Ehab

doi:10.14359/51702134

Cited by 39 publications

(9 citation statements)

References 3 publications

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“…Six specimens with a footprint of 2 m × 2 m, a depth of 0.15 m, cast with a 0.25 m × 0.25 m square column stub also 0.15 m deep were built. The specimen dimensions correspond to realistic construction dimensions and are in line with other experimental research in the area such as [3 , 4] . The experimental scheme and instrumentation is shown in Fig.…”

Section: Experimental Design Materials and Methodssupporting

confidence: 74%

Experimental quantification of punching shear capacity for large-scale GFRP-reinforced flat slabs made of synthetic fiber-reinforced self-compacting concrete dataset

AlHamaydeh

Orabi

2021

Data in Brief

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This article provides experimental data on the punching shear behavior of synthetic fiber-reinforced slabs reinforced with glass fiber reinforced polymer (GFRP) bars and cast from self-consolidating concrete (SCC). The data was collected from tests performed on six full-scale specimens centrically loaded until failure as indicated by penetration of the column stub into the slab and achieving a sharp drop in the load carrying capacity. Three different reinforcement bar spacings were used to consider the effect of reinforcement ratio on punching shear resistance. Three of the specimens tested were reinforced by 1.25% of volume of synthetic fiber, and three were control specimens cast from regular SCC. Applied load, central deflections, and bar strain were monitored during the experiment and are provided in the supplementary data. Any future models for analyzing the punching shear behavior and capacity of flat slabs reinforced with GFRP rebars will find this data valuable for model validation, and for establishing suitable safety factors for design. Numerical studies on the simulation of fiber-reinforced concrete would also find value in this data to validate the numerical model and enable it to be used for further studies.

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Section: Experimental Design Materials and Methodssupporting

confidence: 74%

Experimental quantification of punching shear capacity for large-scale GFRP-reinforced flat slabs made of synthetic fiber-reinforced self-compacting concrete dataset

AlHamaydeh

Orabi

2021

Data in Brief

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“…A. H. Hussein, et al [5] performed an experimental research on six fullscale slabs with interior column connections to investigate two types of glass fiber reinforced polymer as a punching shear reinforcement (headed studs or corrugated bars) when ordinary strength concrete was used. They concluded that both headed studs and corrugated bars increased the punching capacity.…”

Section: Introductionmentioning

confidence: 99%

Assessment of stirrups in resisting punching shear in reinforced concrete flat slab

et al. 2021

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Punching shear is one of the critical concerns in the design of flat slab systems. This research is conducted to investigate the effect of different parameters regarding shear reinforcement on the punching strength of flat slabs. These parameters include yield stress of stirrups, extension of stirrups from column face along slab span, slab thickness, and the shape of stirrups whether multiple leg stirrups or closed stirrups. The experimental program in this research included testing eight slab specimens with dimensions of 1200 × 1200 mm and a thickness of 160 mm and 200 mm. The results of the experimental work were compared to those estimated according to local and international building codes. The results showed that using closed stirrups greatly increased the punching capacity of flat slabs even for a thickness of 160 mm.

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“…Specimen and column dimensions, loading points and eight CFRP rows around loading column are shown in Figure 19. Hussein and El-Salakawy [41] concluded that increasing the flexural tension GFRP reinforcement ratio of high-strength flat slab (80 MPa) from 1% to 1.5% (50% increase) increases the punching shear strength by 15%, while increasing the reinforcement ratio to 2% (100% increases) increases the punching shear strength by 27%. The longitudinal GFRP tension reinforcement was No.…”

Section: Figure 14mentioning

confidence: 99%

“…The normal-strength flat slab set tested for the effect of GFRP shear reinforcement consisted of one control specimen without shear reinforcement, a second specimen reinforced with GFRP shear studs, and a third specimen reinforcement with corrugated GFRP shear reinforcement as seen in Figure 20. The study Hussein and El-Salakawy [41] concluded that increasing the flexural tension GFRP reinforcement ratio of high-strength flat slab (80 MPa) from 1% to 1.5% (50% increase) increases the punching shear strength by 15%, while increasing the reinforcement ratio to 2% (100% increases) increases the punching shear strength by 27%. The longitudinal GFRP tension reinforcement was No.…”

Section: Figure 14mentioning

confidence: 99%

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Fiber Reinforced Polymer Laminates for Strengthening of RC Slabs against Punching Shear: A Review

2020

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Reinforced concrete flat slabs or flat plates continue to be among the most popular floor systems due to speed of construction and inherent flexibility it offers in relation to locations of partitions. However, flat slab/plate floor systems that are deficient in two-way shear strength are susceptible to brittle failure at a slab-column junction that may propagate and lead to progressive collapse of a larger segment of the structural system. Deficiency in two-way shear strength may be due to design/construction errors, material under-strength, or overload. Fiber reinforced polymer (FRP) composite laminates in the form of sheets and/or strips are used in structurally deficient flat slab systems to enhance the two-way shear capacity, flexural strength, stiffness, and ductility. Glass FRP (GFRP) has been used successfully but carbon FRP (CFRP) sheets/strips/laminates are more commonly used as a practical alternative to other expensive and/or challenging methods such column enlargement. This article reviews the literature on the methodology and effectiveness of utilizing FRP sheets/strips and laminates at the column/slab intersection to enhance punching shear strength of flat slabs.Polymers 2020, 12, 685 2 of 27 connection stiffness. The deflected profile in the slab compression region can be considered as straight lines, while that in the tension region shows a slight discontinuity, especially when the shear crack intersects the reinforcement. Moe [4] tested 43 slabs and investigated the results of 140 footings in addition to 120 slabs that are reported in the literature and noted the common appearance of inclined cracks at 60% of the ultimate load. These inclined cracks started from bending cracks, then rapidly extended up to the proximity of the neutral axis and finally developed rather slowly but leaving only a very narrow depth of the compression zone unaffected. During the structural design phase, if the shear capacity is exceeded, shear reinforcement can be designed to enhance the capacity. Some studies indicated that using shear reinforcement in two-way slabs may double the punching shear strength [5].Strengthening flat slabs at the column-slab juncture using externally applied material with high tensile strength did not start with the fiber reinforced polymer (FRP) sheets. Steel plates with steel anchor bolts were used successfully to increase the two-way shear strength of flat slabs. Ebead and Marzouk [6] strengthened slab-column junctions by installing on the tension side 6 mm thick American society for testing and materials (ASTM) A6 plates using 19 mm diameter ASTM A325 bolts. Steel plates increased the ultimate load of the flat slab by 45% when the applied load was central and by 122% when the specimens were subjected to both central loads and moments. The light weight, flexibility, and high tensile strength of FRP sheets and laminates make them viable alternative to steel plates. Externally bonded carbon fiber reinforced polymer (CFRP) sheets that are anchored to concrete at their ends were shown to inc...

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Punching Shear Behavior of Glass Fiber-Reinforced Polymer–Reinforced Concrete Slab-Column Interior Connections

Cited by 39 publications

References 3 publications

Experimental quantification of punching shear capacity for large-scale GFRP-reinforced flat slabs made of synthetic fiber-reinforced self-compacting concrete dataset

Experimental quantification of punching shear capacity for large-scale GFRP-reinforced flat slabs made of synthetic fiber-reinforced self-compacting concrete dataset

Assessment of stirrups in resisting punching shear in reinforced concrete flat slab

Fiber Reinforced Polymer Laminates for Strengthening of RC Slabs against Punching Shear: A Review

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