Analytical Evaluation of High Velocity Impact Resistance of Two-way RC Slab Reinforced with Steel Fiber and FRP Sheet

Lee, Jin Young; Shin, Hyen Oh; Min, Kyeng Hwan; Yoon, Young Soo

doi:10.11112/jksmi.2013.17.3.001

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…The outcome of the study showed that the rate-sensitive microplane model strongly simulated the impact of the mechanical response of the RC beams. In another study, which was conducted by Lee et al [22,23], the high-speed impact course of the FRP-RC slab, as well as the steel fiber RC slab, were simulated using the finite element method software, and a conclusion was drawn which showed that the FRP and steel fibers are capable of diminishing the impact dynamic response in the plate, while also improving the impact resistance of the component. Zhao and Qian [24] created a 3D FE model of the earlier test and studied the effects of impact mass, span-depth ratio, and impact velocity on the impact behavior of RC beams.…”

Section: Introductionmentioning

confidence: 99%

Influence of Supports on the Low-Velocity Impact Response of Square RC Slab of Standard Concrete and Ultra-High Performance Concrete: FEM-Based Computational Analysis

et al. 2023

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Structural members with low-flexural stiffness, such as slabs, are more susceptible to impulsive loadings induced by falling machines/tools during construction and installation, and also from rolling boulders/rocks triggered by wind/earthquake, especially in mountainous areas. The impact resistance of reinforced concrete (RC) slabs supported on two opposite edges (often called the one-way slab) and on all four edges (i.e., two-way slab) has been adequately studied experimentally as well as computationally, and is available in the literature. However, the slabs supported on three edges have not been studied under low-velocity impact for their impact response. For this purpose, a computational study is performed through finite elements by implementing ABAQUS software on the validated model, resulting in the slab, which is supported on (i) three edges and (ii) two opposite edges, to be subjected to low-velocity impact, induced by dropping a 105 kg non-deformable steel mass from a height of 2500 mm onto the slab centroid. Furthermore, the role of the material strength of the concrete of the slab is investigated via replacing the ultra-high performance concrete (UHPC) for standard or normal-strength concrete (NSC). The impact load is modeled by considering the explicit module of the software. Failure mechanism, stress/strain contour, displacement distribution, and crack pattern of the slabs are compared and discussed.

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Section: Introductionmentioning

confidence: 99%

Influence of Supports on the Low-Velocity Impact Response of Square RC Slab of Standard Concrete and Ultra-High Performance Concrete: FEM-Based Computational Analysis

et al. 2023

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“…To study the influence of strain rate on the strength, stiffness, and ductility of RC beams, Ozbolt [21] simulated the three-dimensional RC beams with different shear reinforcement ratios and found that the developed rate-sensitive microplane model could well simulate the impact mechanical behavior of the RC beams. Lee [22,23] used the finite element method (FEM) software to simulate the highspeed impact process of FRP-RC slab and steel fiber RC slab and found that FRP and steel fiber can reduce the impact dynamic response in the plate and enhance the impact resistance of the component. Zhao [24] established a 3D FEM model of the previous test, and the effects of impact velocity, impact mass, and span-depth ratio on the impact response of the RC beams were studied.…”

Section: Introductionmentioning

confidence: 99%

Experiment and Simulation Study on the Dynamic Response of RC Slab under Impact Loading

Wang

Liu

Xiao

et al. 2021

Shock and Vibration

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Reinforced concrete (RC) slab is an important component in civil construction and protection engineering, and its dynamic response under impact loading is a complex mechanical problem, especially for two or multiple continuous impact loads. In this paper, a series of drop hammer impact tests were carried out to investigate the dynamic response of RC slabs with two successive impacts. The time history of impact force and the failure characteristic of the slab surface were recorded. Moreover, four influence factors, including slab thickness, reinforcement ratio, impact location, and drop hammer height have been discussed. Besides, a 3D numerical model based on the finite element method (FEM) was established to expand the research of constrained force, deflection, and vertical stress of an RC slab. The results show that increasing the slab thickness and reinforcement ratio can improve the impact resistance of an RC slab. The impact point location and drop hammer height have a great influence on the dynamic response of the RC slab. In addition, the RC slab will have more obvious damage under the second impact, but the dynamic response becomes weaker. It may be because of the local damage in the concrete caused by the first impact that would weaken the propagation of vibration.

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Improvement of the Strength Properties and Impact Resistance of the Cement Composite Materials by the use of Surface Modification of the Aramid Fibers

Nam¹,

Yoo²,

Kim³

et al. 2015

Journal of the Korea institute for structural maintenance and i

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The purpose of this study is to evaluate the effect of improvement on the impact resistance and strength properties of cement composites by surface modification of aramid fiber. For aramid fiber reinforced cement composites, therefore, dispersion capability and the bonding efficiency between the fibers and the cement composite material need to be improved. It is possible by modifying surface properties to hydrophobic, it is considered that oiling agent ratio of 1.2 % and improvement of performance is in need to be investigated. In this study, short aramid fibers were mixed by different fiber length and oiling agent ratio. And improvement of strength properties and impact resistance performance of hybrid cement composites were evaluated under the influence of steel fiber. As a result, strength properties of aramid fiber reinforced cement composites are different by mixing ratio of fiber, oiling agent ratio and length of fiber. In case of cement composites which have same volume fraction and fiber length, tensile strength and flexural strength were improved with increase of the emulsions throughput of the fiber surface. The results of evaluation on the static strength properties had effects on impact resistance performance by high-velocity impact. And it was observed that the scabbing of rear was suppressed with increase of the oiling agent ratio.

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Analytical Evaluation of High Velocity Impact Resistance of Two-way RC Slab Reinforced with Steel Fiber and FRP Sheet

Cited by 4 publications

References 9 publications

Influence of Supports on the Low-Velocity Impact Response of Square RC Slab of Standard Concrete and Ultra-High Performance Concrete: FEM-Based Computational Analysis

Influence of Supports on the Low-Velocity Impact Response of Square RC Slab of Standard Concrete and Ultra-High Performance Concrete: FEM-Based Computational Analysis

Experiment and Simulation Study on the Dynamic Response of RC Slab under Impact Loading

Improvement of the Strength Properties and Impact Resistance of the Cement Composite Materials by the use of Surface Modification of the Aramid Fibers

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