Mesoscale study of steel fibre-reinforced ultra-high performance concrete under static and dynamic loads

Su, Yu; Li, Jun; Wu, Chengqing; Wu, Pengtao; Tao, Ming; Li, Xibing

doi:10.1016/j.matdes.2016.12.027

Cited by 87 publications

(17 citation statements)

References 34 publications

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“…However, a fracture plane had to be predefined making their approach unsuitable for general simulations. Su et al [21] developed a cylindrical meso-scale model to simulate the dynamic response of ultra-high performance concrete (UHPC) in Split Hopkinson tension tests. UHPC was treated as a two-phase material composed of concrete and fibres.…”

Section: Introductionmentioning

confidence: 99%

Meso-scale modelling of steel fibre reinforced concrete with high strength

Liang

2018

Construction and Building Materials

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Based on Delaunay triangulation, a 3D meso-scale model is successfully developed and verified. This approach modelling fibre and concrete separately and linking them with slide line contact has the capability to truly reflect the interfacial behaviour of fibre and mortar, and thus achieve high fidelity of numerical simulations. However, meso-scale modelling usually means tremendous complexity and long computational time. This paper proposes a model to achieve relatively high computation efficiency, as well as accuracy. Besides, the model has the potential to deal with small specimens cut from steel fibre reinforced concrete (SFRC) blocks.

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Section: Introductionmentioning

confidence: 99%

Meso-scale modelling of steel fibre reinforced concrete with high strength

Liang

2018

Construction and Building Materials

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“…Based on research, another class of material was developed and assigned as UHPFRC. Su et al [35] modelled the solid framework, and the straight round steel fibers are thought to be scattered randomly with Hopkinson pressure bar (SHPB) split tensile test, static split tensile tests. The behaviour of UHPC material under both extreme dynamic loading and static were studied.…”

Section: Strength Of Uhpfrcmentioning

confidence: 99%

Influence of critical parameters on UHPFRC structural elements subjected to blast loading

Rizwanullah

Sharma

2020

SN Appl. Sci.

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Response of structures subjected to blast loading is a highly complex phenomena involving time-dependent deformation, geometric and material nonlinearities and loading rate based material properties. During an explosion, blast loads act as an impulsive load of very short duration developing enormous heat and pressure. With increasing terrorist threats, attention is needed to study dynamic response of structures under blast loading. Ultra high strength concrete (UHPC) has been found to considerably enhance strength, member size, weight reduction and workability and is now a day used due to improved energy absorption capacity, workability and anti-abrasion ability. Investigations conducted by several researchers to study blast-resistant capacities of UHPC have demonstrated possibilities of using the material in structures susceptible to terrorist attack. The present paper provides comprehensive review of published research to study blast loading effect on Ultra high performance fibre reinforced concrete (UHPFRC) structural elements in terms of variables like standoff distance, charge weight, types of blast loadings, grades of UHPFRCs, etc., both analytically and experimentally. UHPFRC slab panels, beams, columns, and other fibre composite structures have been studied at structural level to draw fruitful inferences and conclusions. It has been found that UHPFRC possesses increased capacity to disseminate large amount of energy during blast loading and demonstrates better performance after blast damage contrasted with normal strength concrete and High strength concrete. Detailing in UHPFRC structural elements under seismic condition offers improved blast performance, and UHPFRC can more effectively resist compression and shock waves. Low Strength and low ductility fibres added to UHPFRC further illustrates minimal influence on the blast performance and fracture energy. Shear failure is also found to be one of the dominant modes in UHPFRC under blast loading at close standoff. Based on extensive review, further research is proposed to solve complex problems to achieve appropriate design of structural UHPFRC members.

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“…According to the design requirements of the test plan, the sample used in the test is a cube of 100 mm × 100 mm × 100 mm, and the elastic bar is a circular cylindrical bar with diameter of 50 mm in cross section. e selection of the size of the test piece was made after reference to many scholars' relevant research studies [4][5][6][18][19][20][21][22][23][24]. e contact between the tool and the surface of the rock sample is line contact (one-shaped type, cruciform type) and point contact (spherical type), which is a noncoupling contact, and the other end of the sample is in surface contact with the output bar.…”

Section: Test Overviewmentioning

confidence: 99%

Study on Energy Consumption Characteristics of Different Tools under Impact Load

Zhao

Wang

et al. 2019

Advances in Civil Engineering

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Three different tools for rock breaking were designed and fabricated. Impact crushing tests were conducted on granite samples with an identical impact velocity by using the variable section Split Hopkinson pressure bar (SHPB) test device. In the test, the incident energy, absorbed energy, and cumulative energy values of acoustic emission during the process of rock breaking were collected, and energy utilization efficiency was used as a measure of the energy consumption characteristics for three different tools breaking rock. Experimental results showed that the cruciform tool has the best performance with respect to the energy utilization efficiency, followed by the one-shaped tool and the spherical tool. The cumulative energy values of the acoustic emission of different tools follow the same regularity.

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Mesoscale study of steel fibre-reinforced ultra-high performance concrete under static and dynamic loads

Cited by 87 publications

References 34 publications

Meso-scale modelling of steel fibre reinforced concrete with high strength

Meso-scale modelling of steel fibre reinforced concrete with high strength

Influence of critical parameters on UHPFRC structural elements subjected to blast loading

Study on Energy Consumption Characteristics of Different Tools under Impact Load

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