Loading capacities and failure modes of various reinforced-concrete slabs subjected to high speed loading

Saito, Hideaki; Imamura, Akira; Takeuchi, Masayuki; Kasai, Yoshiyuki; Tsubota, Haruji; Yoshimura, Masanori

doi:10.1016/0029-5493(94)00953-v

Cited by 9 publications

(3 citation statements)

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“…One well documented experiment was conducted by Saito et al, 12 who tested seven types of RC slabs with static (0.00003 m/s [0.000098 ft/s]), low (0.03 m/s [0.098 ft/s]), and high (3 m/s [9.8 ft/s]) loading rates. From the experiment, Saito et al 12 found the load-carrying capacity of slabs increases together with loading rate, and attributed the enhanced strength to the strain rate effect on concrete and steel. However, Saito et al's 12 experiment did not provide information on strain rate and inertial force during test.…”

Section: Introductionmentioning

confidence: 99%

“…From the experiment, Saito et al 12 found the load-carrying capacity of slabs increases together with loading rate, and attributed the enhanced strength to the strain rate effect on concrete and steel. However, Saito et al's 12 experiment did not provide information on strain rate and inertial force during test. For the purposes of gaining more understanding in this field, an experimental program was carried out to investigate slab behavior under different loading rates.…”

Section: Introductionmentioning

confidence: 99%

“…For the purposes of gaining more understanding in this field, an experimental program was carried out to investigate slab behavior under different loading rates. Emphasis was placed on the influence of loading rate on slab response, and in contrast with Saito et al's 12 work, on investigating the induced strain rate and inertial effect.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Study of Reinforced Concrete Slabs under Different Loading Rates

Xiao¹,

Li²,

Fujikake³

2016

ACI Structural Journal

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Eighteen reinforced concrete (RC) slabs were manufactured and tested under static (0.0004 m/s [0.0013 ft/s]), medium (0.4 m/s [0.13 ft/s]), and high (2 m/s [6.6 ft/s]) rates of concentrated loading at slab center using a displacement-controlled rapid-loading machine. The data from the experiment were used to study the effects of loading rates and other parameters (such as slab depth and longitudinal and shear reinforcement ratios) on the performance of RC slabs. From test results, the load-carrying and energy absorption capacities of specimens, inertial force, and strain rate were found to increase with higher loading rates. Shear reinforcement was found to be more effective than longitudinal reinforcement in enhancing slab's performance under a high loading rate. The failure modes of specimens were governed by punching shear irrespective of loading rate. Additionally, another six slabs were made and tested under low-velocity (5.425 m/s [17.8 ft/s]) impact using a drop-weight machine. A comparison between the results from high loading rate and impact tests indicates similar damage process, failure mode, strain rate, and energy absorption capacity. This comparison well correlates a high-loading-rate test with impact testing, which suggests the possibility of using high load rate test to help understand slab's performance under low-velocity impact.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Study of Reinforced Concrete Slabs under Different Loading Rates

Xiao¹,

Li²,

Fujikake³

2016

ACI Structural Journal

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Experimental and numerical studies on low velocity impact behaviors of curved prestressed concrete shells

Zhi,

Li,

Song

et al. 2025

Engineering Structures

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Assessing punching shear failure in reinforced concrete flat slabs subjected to localised impact loading

Micallef

Sagaseta

Ruiz

et al. 2014

International Journal of Impact Engineering

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Reinforced concrete flat slab structures are used widely in construction projects due to their economic and functional advantages. Punching shear failure in such structures can have catastrophic effects in the case of, for example, multi-storey framed structures and the designer aims to ensure that ductile flexural deformation occurs before the brittle shear failure. Shear mechanisms generally govern the behaviour of reinforced concrete structures subjected to localised impact loads. Existing experimental results investigating punching shear in flat slabs subjected to impact loading shows that when increasing the loading rate, the punching shear strength also increases whereas the deformation capacity reduces. This behaviour is due to a combination of inertial effects and material strain-rate effects which leads to a stiffer behaviour of the slab for higher loading rates. This can also lead to a change of mode of failure from flexural to pure punching shear with increasing loading rates. Current empirical formulae for punching shear are unable to predict this behaviour since the slab deformations are not considered for calculating the punching shear strength. This paper presents an analytical model based on the Critical Shear Crack Theory which can be applied to flat slabs subjected to impact loading. This model is particularly useful for cases such as progressive collapse analysis and flat slab-column connections subjected to an impulsive axial load in the column. The novelty of the approach is that it considers (a) the dynamic punching shear capacity and (b) the dynamic shear demand, both in terms of the slab deformation (slab rotation). The model considers inertial effects and material strain-rate effects although it is shown that the former has a more significant effect. Moreover, the model allows a further physical understanding of the phenomena and it can be applied to different cases (slabs with and without transverse reinforcement) showing a good correlation with experimental data. © 2014 The Authors. Published by Elsevier Ltd

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Loading capacities and failure modes of various reinforced-concrete slabs subjected to high speed loading

Cited by 9 publications

References 0 publications

Experimental Study of Reinforced Concrete Slabs under Different Loading Rates

Experimental Study of Reinforced Concrete Slabs under Different Loading Rates

Experimental and numerical studies on low velocity impact behaviors of curved prestressed concrete shells

Assessing punching shear failure in reinforced concrete flat slabs subjected to localised impact loading

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