Investigation of UHPFRC Slabs Under Blast Loads

Rebentrost, Mark; Wight, Gavin

doi:10.1002/9781118557839.ch24

Cited by 13 publications

(15 citation statements)

References 3 publications

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“…The high-energy absorption capacity of UHP-FRC, combined with its high resistance to scabbing, spalling, and fragmentation [7][8][9][10][11], makes it ideal for protective shields. The construction of shield plates plays an essential part in protecting existing strategic buildings against extreme loading conditions caused by blast, shock or impact loads [7][8][9][10][11][12][13][14].…”

Section: One Of the Potential Applications Of Uhp-frc Is In Protectiv...mentioning

confidence: 99%

“…Moreover, the use of UHP-FRC produced a more ductile failure mode and no fragmentations when compared to conventional concrete (NSC and HSC) panels of the same size and geometry. Experimental research conducted over the past decade [14,[16][17][18][19][20][21] also demonstrates the outstanding performance of UHP-FRC structures and protective shields under blast loads. This research study aims to develop a high-performance protection system for new or existing structures against blast loading hazards by implementing accelerated construction technology with high-performance materials in the form of precast UHP-FRC shields.…”

Section: One Of the Potential Applications Of Uhp-frc Is In Protectiv...mentioning

confidence: 99%

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Response of Ultra-High Performance Fibre Reinforced Concrete Wall Panels to Blast Loading

Sherif¹

2022

Preprint

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Ultra-High-Performance Fibre Reinforced Concrete (UHP-FRC) is a next-generation concrete with outstanding properties in the fresh and hardened state and superior dynamic properties to traditional concretes. This research focuses on the response of UHP-FRC wall panels under blast loading and presents the advantage of using UHP-FRC over traditional concrete in blast-resistant applications while proposing procedures for the practical analysis and design of UHP-FRC blast protection shields. These objectives are achieved through a two-phased experimental investigation and a comprehensive numerical study. The first phase of the experimental program is conducted at Ryerson University. It includes static four-point load testing on six UHP-FRC one-way panels to investigate the effects of different reinforcement ratios (0%, 1%, and 2%) and fibre volumetric ratios (2% and 3%) on flexural response. The experimental results are used as reference static data for the dynamic shock tube testing. The second phase of the experimental program is conducted at the University of Ottawa using a blast load simulator (shock tube) to investigate the dynamic response of UHP-FRC panels to blast loading. Eight one-way simple supported panels of identical dimensions are tested. The parameters investigated are the steel reinforcement ratio (0%, 1%, and 2%), steel fibre volumetric ratio (2% and 3%), and concrete type (UHP-FRC vs. NSC and HSC). Furthermore, the study provides reference data for the validation of the numerical modelling. The test results showed that UHP-FRC outperformed traditional concrete by showing reduced fragmentation and higher ductility and energy absorption. Experimental results also showed that steel reinforcement is critical to the overall performance of the UHP-FRC panels. The numerical investigation included the development of a new constitutive model suitable for UHP-FRC to be used with the concrete damage plasticity model (CDP) for finite element analysis. The numerical simulations are performed using the ABAQUS/Explicit[1] numerical platform. The model is validated against the experimental data from the current study and other published data from the literature, yielding good results. The developed numerical model is further used to conduct a comprehensive design optimization study on UHP-FRC wall panels. The parametric study provides guidelines for selecting optimum design parameters for UHP-FRC blast protection panels.

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Section: One Of the Potential Applications Of Uhp-frc Is In Protectiv...mentioning

confidence: 99%

Section: One Of the Potential Applications Of Uhp-frc Is In Protectiv...mentioning

confidence: 99%

Response of Ultra-High Performance Fibre Reinforced Concrete Wall Panels to Blast Loading

Sherif¹

2022

Preprint

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“…It has been found out experimentally at Ryerson University that the fracture energy of UHP-FRC is about 100 times that of ordinary concrete . The high-energy absorption capacity of UHP-FRC, as well as its resistance to scabbing, spalling and fragmentation (Li et al, 2015b;Millard et al, 2010;Riisgaard et al, 2006;Yi et al, 2012;Yu, 2015), enables the construction of shield plates that play an essential part in protecting existing strategic buildings against extreme loading conditions caused by blast, shock or impact loads (Cavill et al, 2006;Ellis et al, 2014;Lee et al, 2016;Li et al, 2015a;Othman, 2016;Othman and Marzouk, 2016;Rebentrost and White, 2011;Schleyer et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…A strong engineering evidence on low-speed impact tests done by Othman and Marzouk (2016) on UHP-FRC slabs showed that UHP-FRC has more ductility and energy absorption due to the presence of fibres that bridge the cracks and thus also produces a more ductile failure mode and no fragmentations than the panels of the same size and geometry made from high-strength concrete (HSC) and normal-strength concrete (NSC). Moreover, the experimental research conducted over the past decade (Cavill et al, 2006;Mao et al, 2015;Ngo et al, 2013;Rebentrost, 2009;Slotz et al, 2014;Yi et al, 2012;Yu, 2015) showed that UHP-FRC has an outstanding performance in the field of defensive structures and protective shields, specifically against blast loads compared to HSC and NSC.…”

Section: Introductionmentioning

confidence: 99%

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

Sherif

Othman

Marzouk

et al. 2020

International Journal of Protective Structures

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Ultra-high-performance fibre-reinforced concrete is the latest generation of structural concrete, having outstanding fresh and hardened properties; this includes the ease of placement and consolidation with ultra-high mechanical properties, as well as toughness, volume stability, durability, higher flexural and tensile strength, and ductility. As more research is being focused on it, the material behaviour and characteristics are getting more understood, and the research demand for the special applications of the ultra-high-performance fibre-reinforced concrete is growing higher. One special application that ultra-high-performance fibre-reinforced concrete is thought to have an outstanding performance at is in the field of protective structures, specifically against blast loads. This article presents part of a study that is concerned with the behaviour and response of ultra-high-performance fibre-reinforced concrete wall panels under blast load. Size and shape optimization techniques were combined in this study to optimize the design of a 200-MPa ultra-high-performance fibre-reinforced concrete under blast loads using finite element modelling. This design optimization aims to maximize stiffness and minimize the cost while satisfying both design stresses and construction requirements. The design variable to be optimized for are the thickness ranging from 100 to 300 mm at 25 mm increments, in addition to the reinforcement ratio of 0%, 0.2%, 1% and 3%, and aspect ratio of 1, 1.5 and 2; the boundary condition is four edges fixed and restrained. The numerical simulation has been performed using an explicate finite element software package. The complete behaviour of an ultra-high-performance fibre-reinforced concrete is defined using the concrete damaged plasticity model. The concrete constitutive model has been developed considering the contribution of tensile hardening response, fracture energy and crack-band width approaches to accurately represent the tensile behaviour and guarantee mesh independence of results. The blast load is applied using the Conventional Weapons method of the US Army Corps of Engineers that is readily available in the finite element software. The validity of the numerical model used is verified by comparing numerical results to experimental data.

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“…In USA, three UHPdC prestressed concrete girder simple-span bridges have been constructed. In addition, UHPdC is also being considered to be used in a range of other applications such as precast concrete piles (Vande Voort et al, 2008), seismic retrofit of substandard bridge substructures (Massicotte and Boucher-Proulx, 2010;Brühwiler and Denarié, 2008), thin-bonded overlays on deteriorated bridge decks , and security and blast mitigation applications (Green, 2010;Rebentrost and Wight, 2009). According to Cavill and Chirgwin (2003), UHPdC is the best choice to be used in bridge constructions specifically when the bridge is located in an aggressive environment, when the weight is an important issue during construction as well as in the final structure, when fatigue or impact loads are serious issues, and when there are some priorities for architectural concerns.…”

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confidence: 99%

A review on ultra high performance ‘ductile’ concrete (UHPdC) technology

Nematollahi¹,

Saifulnaz²,

Jaafar³

et al. 2012

IJCSER

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One of the significant breakthroughs in concrete technology in the 20 th century was the development of ultra high performance fiber reinforced concrete (UHP-FRC) or reactive powder concrete (RPC) more commonly known as ultra high performance "ductile" concrete (UHPdC) with compressive strength over 150 MPa and flexural strength over 30 MPa; and enhanced durability compared to conventional concrete. In brief, UHPdC is a cementitious based composite material that consists of the distinctive characteristics of the ultra-high performance concrete and high tensile strength steel fibers. UHPdC is a sustainable construction material with considerable amount of durability, ductility and tensile capacity which is mostly appropriate for use in the fabrication of precast members in civil engineering, structural and architectural applications. This paper presents a review on the UHPdC technology including an overview of material characteristics of a Malaysian UHPdC blend (i.e. Dura ® ), the principles of UHPdC development, its mix design, its advantages, and its applications.

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Investigation of UHPFRC Slabs Under Blast Loads

Cited by 13 publications

References 3 publications

Response of Ultra-High Performance Fibre Reinforced Concrete Wall Panels to Blast Loading

Response of Ultra-High Performance Fibre Reinforced Concrete Wall Panels to Blast Loading

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

A review on ultra high performance ‘ductile’ concrete (UHPdC) technology

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