Experimental investigation of prestressed and reinforced concrete plates under falling weight impactor

Kumar, V.; Iqbal, M.A.; Mittal, Achal Kumar

doi:10.1016/j.tws.2017.06.028

Cited by 34 publications

(13 citation statements)

References 18 publications

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“…The increase of the input impact energy applied to test specimens from 1.236 to 1.513 kJ increased the average impact forces acting on RC slabs from 32.41 to 37.30 kN. Independently of the support layouts, for the whole RC slabs, the increase of the input impact energy applied to RC slabs, and correspondingly the increase of the impact forces acting on RC slabs, enhanced the maximum left and right acceleration values, the maximum and residual displacement values, on average, 25, 25, 35, and 33%, respectively 4,5,7,12,16,18,19 . It has been also observed that the increase of the input impact energy applied to RC slabs caused a significant increase in the number and width of bending cracks at the tension side of RC slabs.…”

Section: Resultsmentioning

confidence: 94%

“…This demonstrates that the friction losses occurring in the drop‐weight test setup can be neglected and the test setup can apply impact loads with identical input impact energies. The negligible differences that occurred in the impact loads measured from RC slabs subjected to identical input impact energy stem from the different strength and stiffness values of RC slabs 4,5,7,12,16,18,19,22,23 …”

Section: Resultsmentioning

confidence: 99%

“…The literature review reveals that there are comprehensive studies where the effects of the steel reinforcement ratios and the applied input impact energy level on impact behavior of RC slabs have been investigated. Furthermore, the studies focused on the impact behavior of RC slabs strengthened using fiber reinforced polymer (FRP) material with various layouts, the pretensioned RC slabs, and the slabs manufactured from fiber‐RC have been presented in the literature 1–18 . However, the number of experimental studies examining the effects of different support conditions on the behavior of RC slabs subjected to impact loading is quite limited 19 …”

Section: Introductionmentioning

confidence: 99%

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Experimental and numerical investigation of impact behavior of reinforced concrete slab with different support conditions

Yılmaz

Kıraç

Erdem

et al. 2020

Structural Concrete

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Reinforced concrete (RC) slabs may be subjected to impulsive dynamic loads such as blast and impact during their service period. Many studies related to the impact behavior of RC slabs have been presented. However, comprehensive studies where the effect of the support conditions on the impact behavior of RC slabs has been investigated are still limited. Thus, this study has focused on the effects of the support types and the support layouts on the dynamic responses and the failure modes of RC slabs subjected to impact loads. In the first part of the study, 9 two‐way RC slabs with various support layouts composed of fixed and hinged supports were tested under impact load via the drop‐weight test setup. Two different input impact energies were transmitted to RC slabs during impact loading. The time histories of the accelerations and displacements occurred in RC slabs, and the impact loads acting on RC slabs were recorded. The crack patterns due to the impact load were observed. The dynamic responses obtained by experiments have been interpreted in detail. In the second part, a detailed finite element procedure in which explicit dynamic analysis is performed has been introduced for verification of the experimental results. Good agreement between the experimental and the numerical results has been demonstrated. It has been concluded that proposed finite element procedures can be used for evaluation of the dynamic responses and failure modes of RC slabs under low‐velocity impact load.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental and numerical investigation of impact behavior of reinforced concrete slab with different support conditions

Yılmaz

Kıraç

Erdem

et al. 2020

Structural Concrete

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“…Test’s configuration resembles an ordinary quasi-static three-point bending experiment. A similar approach is testing of concrete slabs, also held by a fixed support, usually a frame, subjected to a heavyweight impact (Kumar et al, 2018). A different method of applying an impact load on a concrete specimen is the split-Hopkinson bar, which can be used in different configurations to induce pressure, tension or torque loads (Gerlach et al, 2012; Lee et al, 2018).…”

Section: Technical Backgroundmentioning

confidence: 99%

Experimental procedure for determination of the energy dissipation capacity of ultra-high-performance fibre-reinforced concrete under localized impact loading

Konrád

Sovják

2019

International Journal of Protective Structures

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Research presented in this article is aimed to investigate the ability of ultra-high-performance fibre-reinforced concrete to absorb and dissipate mechanical energy at elevated strain rate loading. Specimens made of ultrahigh-performance fibre-reinforced concrete were subjected to the low-velocity impact using the new testing procedure where no fixed supports that hold the sample during the impact were applied. The fibre volume fraction of the ultra-high-performance fibre-reinforced concrete was set as the main test variable in the framework of this study and the volumetric fraction of fibres was ranging from 0.125% to 2%. A high-speed camera was used to measure velocities of the impactor and the ultra-high-performance fibre-reinforced concrete specimen before and after the impact. Consequently, the energy dissipated by the ultra-highperformance fibre-reinforced concrete specimen during the impact was calculated using a simple energy balance equation. To determine the basic material properties of ultra-high-performance fibre-reinforced concrete, quasi-static loading rate was applied and conventional methods were used. A significant difference between the values of dissipated energies for different loading rates and various fibre volumetric fractions was observed. It can be noted that the new procedure shows a reasonable approach for testing the fibrereinforced cementitious composites under localized impact loading and is worthy of further optimization.

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“…Therefore, an extensive work should be undertaken in an attempt to develop a design procedure for post impact resistant and to improve the behavior of RC elements subjected to impact loads. Up to now, the developing of empirical provisions for estimating the damage and structural capacity under specific impact loading is the most focused topic of the majority of the impact loading related research Kennedy 1976, Vimal et al 2017, Wei et al 2013, Chen and May 2009 . Furthermore, more of the research work has been exclusively focused on slab and wall mechanism of localized damage such as impactor penetration, concrete scabbing, and impactor perforation Chang-Geun et al 2015, Duc-Kien and Seung-Eock 2014, Shujian et al 2016 .…”

Section: Introductionmentioning

confidence: 99%

Failure Analysis of Polypropylene Fiber Reinforced Concrete Two-Way Slabs Subjected to Static and Impact Load Induced by Free Falling Mass

Al-Rousan

2018

Lat. Am. j. solids struct.

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The impact resistance of concrete is considered as poor due to a relatively energy dissipating characteristics and tensile strength. Therefore, this paper investigates the feasibility of using polypropylene fibers PF to enhance punching shear capacity of reinforced concrete RC two-way slabs subjected to drop-weight impacts. The evaluated parameters included two slab thickness 70 mm and 90 mm , five different PF percentages 0%, 0.3%, 0.6%, 0.9%, and 1.2% , and two impact load height 1.2 m and 2.4 m . The tested slabs divided into three groups: not subjected to impact load, subjected to impact load at a height of 1.2 m, and subjected to impact load at a height of 2.4 m, resulting in a total of 25 slabs. The behavior of each two-way RC slab was evaluated in terms of the crack patterns, ultimate punching shear capacity. The present experimental data can be used for further assessment of the performance of PF reinforced concretes two-way slabs as well as providing a well-documented dataset related to the impact-resistant applications which is presently limited within the literature. The results showed that adding the PF at a dosage of 0.3 to 1.2% by volume of concrete and increasing the slab thickness from 70 mm to 90 mm leads to considerable enhancement in the overall structural behavior of the slabs and their resistance to impact loading. Interestingly, the degradation in the ultimate punching capacity of the slabs subjected to impact load at a height of 1.2 and 2.4 m is 30.5% and 34.6%, respectively. Finally, an empirical model was proposed for predicting the punching shear capacity of RC twoway slabs based on reliable experimental results available in literature

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Experimental investigation of prestressed and reinforced concrete plates under falling weight impactor

Cited by 34 publications

References 18 publications

Experimental and numerical investigation of impact behavior of reinforced concrete slab with different support conditions

Experimental and numerical investigation of impact behavior of reinforced concrete slab with different support conditions

Experimental procedure for determination of the energy dissipation capacity of ultra-high-performance fibre-reinforced concrete under localized impact loading

Failure Analysis of Polypropylene Fiber Reinforced Concrete Two-Way Slabs Subjected to Static and Impact Load Induced by Free Falling Mass

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