Numerical investigation on the behavior of reinforced concrete slabs strengthened with carbon fiber textile reinforcement under impact loads

Batarlar, Baturay; Saatcı, Selçuk

doi:10.1016/j.istruc.2022.05.057

Cited by 9 publications

(7 citation statements)

References 33 publications

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“…Testing of D150s0 and D200s0 was conducted as a part of another study [12]. Load-midpoint displacement curves obtained from all tests are presented in Fig.…”

Section: Test Results and Discussionmentioning

confidence: 99%

Efficiency of shear studs manufactured from threaded bars on the punching behavior of flat slabs

Saatci¹,

Yasayanlar²

2023

JSEAM

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Punching resistance in flat slab systems in reinforced concrete structures is often provided with drop panels or shear reinforcement around columns. Shear studs are effectively used in these structures as shear reinforcement. However, factory-made shear studs may not be available in all locations and small quantities for small projects. Therefore, cheap shear studs that can be manufactured from widely available materials in small quantities can be very useful in certain cases. In this study, shear studs manufactured from threaded bars, widely available in hardware stores, are used for providing punching resistance to flat slabs. Stud heads were formed with T-section nuts. Four slab specimens, two with shear studs and two without, were cast and tested under concentrated loads at their mid-point. The slabs had 2150×2150×150 mm dimensions and they were cast with two different longitudinal reinforcement ratios. Test results showed that manufactured shear studs significantly increased the load and deformation capacities of the slabs. Slabs with shear studs were able to show up to three times higher bending deformations and they were able to sustain up to 50% higher loads. The study has shown that these studs can be effectively used for punching strengthening purposes in flat plate systems or in other cases where punching resistance is needed.

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“…Testing of D150s0 and D200s0 was conducted as a part of another study [12]. Load-midpoint displacement curves obtained from all tests are presented in Fig.…”

Section: Test Results and Discussionmentioning

confidence: 99%

Efficiency of shear studs manufactured from threaded bars on the punching behavior of flat slabs

Saatci¹,

Yasayanlar²

2023

JSEAM

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“…Slab failure behavior is influenced by inertia and stress forces [67]. Typically, the thickness of the slab is thinner and considered more vulnerable to impact loading due to flexural or punching shear failures [41,42,44,53,57,67,77]. Miyamoto et al [45] proposed slab failure under the impact load, demonstrating that slab failure behavior under increasing impact loads changes from the flexural punching shear failure.…”

Section: Discussionmentioning

confidence: 99%

“…Slabs with a higher steel ratio had less punching failure behavior [59] and protected the concrete slab from scabbing failure mode. Figure 6 shows three RC The RC slab failure mode depended on the reinforcement ratio and height of the impactor load; by increasing mass and height, there was a higher tendency for local failure in the RC slab [44][45][46]49,[55][56][57]. At high loading rates, flexural behavior was scarcely visible [51].…”

Section: Slab Failure Under Impact Loadmentioning

confidence: 99%

“…In other words, the peak impact load increased by 500% when the impact velocity changed from 1.98 to 13.28. The impact velocity was among the significant contributing parameters that damaged the RC structures/slab behavior under impact load; by increasing the impact velocity, the impact damage increased [14,19,25,30,41,42,[44][45][46][47][48][49][50][51]55,57,63,[69][70][71][74][75][76][77][78][79][80][81][82][83][84]. In conjunction with the impactor velocity, the impact mass has been studied in the literature and it has been revealed that, when the impactor weight increased, the failure or damage in the RC structure grew.…”

Section: High-strength Rc Slab Subjected To Impact Loadmentioning

confidence: 99%

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Failure Modes Behavior of Different Strengthening Types of RC Slabs Subjected to Low-Velocity Impact Loading: A Review

et al. 2023

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Concrete is brittle; hence, it is incredibly likely that concrete buildings may fail in both local and global ways under dynamic and impulsive stresses. An extensive review investigation was carried out to examine reinforced concrete (RC) slab behavior under low-velocity impact loading. Significant past research studies that dealt with experimental and numerical simulations and analytical modeling of the RC slabs under impact loading have been presented in this work. As a result, numerous attempts to define failure behavior and to assess concrete structures’ vulnerability to lateral impact loads have been made in the literature. Based on analytical, numerical, and experimental studies carried out in previous research, this article thoroughly reviewed the current state of the art regarding the responses and failure behaviors of various types of concrete structures and members subjected to low-velocity impact loading. The effects of different structural and load-related factors were examined regarding the impact strength and failure behavior of reinforced concrete slabs reinforced with various types of strengthening procedures and exposed to low-velocity impact loads. The reviews suggested that advanced composite materials, shear reinforcement, and hybrid techniques are promising for effectively strengthening concrete structures.

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“…Therefore, the behavior of the element under the low-speed impacts is defined by the rigid-plastic material acceptance. The dynamic behaviors under low-speed impact effects of reinforced concrete and composite beams [8][9][10], steel and composite columns [11][12][13], slabs [14][15][16], and wall elements with different geometric features [17] have been studied experimentally and numerically. Different material models can be selected while creating the finite element model of the floor element under the impact [18].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Behaviours along Weak Axes of Steel Beam under Low Velocity Impact Loading: Experimental and Numerical

Nasery

2023

Buildings

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This study examines the behaviors of structural members in their most vulnerable state (fixed along their weak axes) against sudden loads such as impact loads. To do so, eight supported rectangular hollow steel beam samples were constructed, and a circular head hammer weighing 75 kg was dropped as a free fall along the weak axes of these beams. Each fall had a different drop height (ranging from 250 mm to 2000 mm) and different amounts of energy (ranging from 183 J to 1471 J) in order to compare the structural behaviors of the beams against low velocity impacts with different drop heights and energy levels. Additionally, finite element analyses were conducted to investigate the performances of the rectangular hollow steel beams against impact loading along the weak axes numerically as well as experimentally. Initially, six model verification and mesh convergence analyses were performed to determine the optimum mesh size. After that, eight finite element models were developed with verified data in order to calculate the displacements, accelerations, plastic denting values, distributed stresses, and plastic equivalent strains. Consequently, impact load factors for static analysis were calculated mathematically and compared with the experimental and numerical results. Overall, the results obtained from the FE analyses were in line with the results obtained from experimental and mathematical studies. To sum up, the increases in the drop height of the impact force and the amount of energy in beams placed along their weak axes will increase the amounts of acceleration, maximum deflection, internal stress, residual displacement, and plastic denting in such beams.

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Numerical investigation on the behavior of reinforced concrete slabs strengthened with carbon fiber textile reinforcement under impact loads

Cited by 9 publications

References 33 publications

Efficiency of shear studs manufactured from threaded bars on the punching behavior of flat slabs

Efficiency of shear studs manufactured from threaded bars on the punching behavior of flat slabs

Failure Modes Behavior of Different Strengthening Types of RC Slabs Subjected to Low-Velocity Impact Loading: A Review

Investigation on Behaviours along Weak Axes of Steel Beam under Low Velocity Impact Loading: Experimental and Numerical

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