Design guidelines and optimization of ultra-high-performance fibre-reinforced concrete blast protection wall panels

Sherif, Mohtady Moataz; Othman, H.; Marzouk, H.; Aoude, Hassan

doi:10.1177/2041419620912751

Cited by 5 publications

(3 citation statements)

References 44 publications

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“…); thus, several researchers concluded that the strain rate effects are minor for UHP-FRC under blast loading conditions and it will lead to overestimation of the capacity and response. Further details on the strain rate effect for UHP-FRC at different strain rate can be found elsewhere (Li et al, 2015;Othman, 2016;Othman et al, 2019;Othman and Marzouk, 2017;Sherif, 2022;Sherif et al, 2020;Smith et al, 2014;Wu et al, 2018).…”

Section: Strain Rate Effect On Uhp-frc Under Blast Loadingmentioning

confidence: 99%

An experimentally validated numerical analysis of UHP-FRC subjected to blast loading

Sherif

Othman

Marzouk

et al. 2022

International Journal of Protective Structures

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This paper presents a new material constitutive model for simulating the uniaxial material behavior of ultra-high performance fiber reinforced concrete (UHP-FRC). The model accounts for the contribution of the steel fiber content to the tensile behavior. The model variables are the fracture energy, the characteristic length, and the crack bandwidth. Thus, it guarantees a mesh size independent numerical modeling of UHP-FRC. The model is developed based on the reported results of a state-of-the-art and highly accurate experimental investigation for the uniaxial behavior of UHP-FRC. This paper also adopts the concrete damage plasticity model (CDP) as a multi-axial yield surface criterion and presents the applicability of the material constitutive model and CDP for modeling UHP-FRC under unconfined non-contact blast loading. The results of the numerical models are validated against the experimental data of shock tube testing conducted by the authors at the University of Ottawa shock tube in collaboration with Ryerson University. The results revealed that the developed material constitutive model accurately represented the uniaxial behavior of UHP-FRC. The CDP model combined with the material constitutive model developed in this study can accurately model UHP-FRC structures under unconfined non-contact blast loading.

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Section: Strain Rate Effect On Uhp-frc Under Blast Loadingmentioning

confidence: 99%

An experimentally validated numerical analysis of UHP-FRC subjected to blast loading

Sherif

Othman

Marzouk

et al. 2022

International Journal of Protective Structures

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“…On the other hand, by changing the material of concrete, the RC slabs are made of ultra-high-strength concrete [29], ultra-high-performance fiber-reinforced concrete [30], superabsorbent polymer honeycomb concrete [31], 200 MPa ultra-high-performance fiberreinforced concrete [32] and ultra-high-ductility concrete mixed with ultra-high-performance concrete [33,34], which have a better anti-explosion performance than ordinary RC slabs.…”

Section: Introductionmentioning

confidence: 99%

A Research Investigation into the Impact of Reinforcement Distribution and Blast Distance on the Blast Resilience of Reinforced Concrete Slabs

Wang²,

Liu³

et al. 2023

Materials

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Reinforcement is one of the important factors affecting the anti-blast performance of reinforced concrete (RC) slabs. In order to study the impact of different reinforcement distribution and different blast distances on the anti-blast performance of RC slabs, 16 model tests were carried out for RC slab members with the same reinforcement ratio but different reinforcement distribution and the same proportional blast distance but different blast distances. By comparing the failure patterns of RC slabs and the sensor test data, the impact of reinforcement distribution and blast distance on the dynamic response of RC slabs was analyzed. The results show that, under contact explosion and non-contact explosion, the damage degree of single-layer reinforced slabs is more serious than that of double-layer reinforced slabs. When the scale distance is the same, with the increase of distance, the damage degree of single-layer reinforced slabs and double-layer reinforced slabs increases first and then decreases, and the peak displacement, rebound displacement and residual deformation near the center of the bottom of RC slabs gradually increase. When the blast distance is small, the peak displacement of single-layer reinforced slabs is smaller than that of double-layer reinforced slabs. When the blast distance is large, the peak displacement of double-layer reinforced slabs is smaller than that of single-layer reinforced slabs. No matter how large the blast distance, the rebound peak displacement of the double-layer reinforced slabs is smaller, and the residual displacement is larger. The research in this paper provides a reference for the anti-explosion design, construction and protection of RC slabs.

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“…Fiber reinforced concrete (FRC) has been widely used to repair and strengthen reinforced concrete infrastructures in the last few decades. FRC applications are employed in concrete pavement such as aircraft runways, dam spillways, highway bridge expansion joints, tunnels, and harbor wharves, and FRC can also be applied to chemical factories and military reinforced concrete structures (Sherif et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Mechanical behavior of different fiber lengths mix-proportions carbon fiber reinforced concrete subjected to static, impact, and blast loading

Ramanathan

Syu

et al. 2022

International Journal of Protective Structures

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Impact and blast wave loadings act as high instant energy and might cause damage to reinforced concrete infrastructures. This research aims to investigate the effect of using different length proportions of carbon fiber on the mechanical behaviors of concrete. Moreover, in this study, original carbon fiber and sizing-removed carbon fiber were added into concrete with different mix-proportions. The sizing on the carbon fiber surface was removed by using heat-treated method. In addition, the carbon fiber was dispersed by a high-pressure air compressor. Lengths of 12 mm and 24 mm carbon fibers were used in different mix-proportions to find the highest mechanical strength of carbon fiber reinforced concrete (CFRC) under a 1% fiber-to-cement weight ratio. Compressive, flexural, and impact tests were conducted on CFRC specimens. The CFRC specimen with 50% 12 mm and 50% 24 mm sizing-removed carbon fiber attained the highest impact resistance, and it also had the best performance under blast wave loading compared with the other CFRC specimens. The broken CFRC specimens were examined by an optical microscope to identify the failure mode of the carbon fibers in CFRC specimens. The addition of 50% 12 mm and 50% 24 mm sizing-removed carbon fiber can significantly improve the compressive and flexural strength of reinforced concrete.

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Design guidelines and optimization of ultra-high-performance fibre-reinforced concrete blast protection wall panels

Cited by 5 publications

References 44 publications

An experimentally validated numerical analysis of UHP-FRC subjected to blast loading

An experimentally validated numerical analysis of UHP-FRC subjected to blast loading

A Research Investigation into the Impact of Reinforcement Distribution and Blast Distance on the Blast Resilience of Reinforced Concrete Slabs

Mechanical behavior of different fiber lengths mix-proportions carbon fiber reinforced concrete subjected to static, impact, and blast loading

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