An analytical description of the force–deflection diagram of FRC

Kovář, Martin; Foglar, Marek

doi:10.1016/j.compositesb.2014.10.021

Cited by 14 publications

(14 citation statements)

References 21 publications

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“…In general, an increase in the reinforcement area at the point of impact enhances the resistance of the pier to impact loading. A further reduction could be achieved by adding fibres to the concrete mix; for example [22][23][24]. This results in increased fracture energy and thus increased resistance to fast dynamic loading, as has been verified for blast loading.…”

Section: Discussionmentioning

confidence: 92%

Numerical analysis of a bridge pier subjected to truck impact

Jiříček

Foglar

2016

Structural Concrete

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Numerical analysis of a bridge pier subjected to truck impactThe impact of heavy trucks on a bridge substructure can lead to progressive collapse of the bridge superstructure, and to disastrous accidents. This type of load should therefore be taken into consideration, especially in the design of motorway bridges. For some structural arrangements, vehicle impact is the decisive loading for the design of the bridge substructure. This paper presents verification of the detailed procedures given by European standard EN 1991-1-7 for bridge pier impact load -dynamic analysis, which is compared with the outcomes from a detailed finiteelement model (FEM) of a truck impact prepared using AUTODYN software. A nonlinear material model of concrete with damage and strain-rate effect is used to assess the impact performance of a bridge pier. The paper further presents the results of a numerical study focused on the influence of different types of bridge pier reinforcement arrangement on their resistance to vehicle impact. The performance of various types of reinforcement is analysed and compared. Practical recommendations are drawn for the design of bridge piers which can be subjected to vehicle impacts in an urban environment.

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Section: Discussionmentioning

confidence: 92%

Numerical analysis of a bridge pier subjected to truck impact

Jiříček

Foglar

2016

Structural Concrete

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“…The outputs of these tests were force-deflection diagrams. The results of the experiments were studied in [26].…”

Section: Materials Model For Plain Concrete and Fiber Reinforced Concretementioning

confidence: 99%

“…The fracture properties of FRC with low-strength and low-ductility steel fibers were first studied in Kovář et al [2] and [26]. Two different concrete strengths were tested.…”

Section: Introductionmentioning

confidence: 99%

Blast performance of RC panels with waste steel fibers

Foglar

Hájek

Kovář

et al. 2015

Construction and Building Materials

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“…When using the non-fibre concrete, material dataset was generated by the lS-DYNA algorithm starting from the concrete nominal value of 15 mPa. however, and following different authors [2,[5][6], starting from the automatic parameters any modification can be done to reproduce a particular concrete. In this case, the fracture energy parameter (G f ) in tension was modified to 6.835 mPa-mm for the steel fibres and 4.1 mPa-mm for the polypropylene ones.…”

Section: Rebound Hammer Damage Assessmentmentioning

confidence: 99%

“…internal or external reinforcement. As an internal reinforcement it is common to use fibres such as steel [1,2], carbon [3,4] or polypropylene [5,6]; while for the external elements it is common to use aluminium foam [7] or steel sheets [8]. Nowadays, the use of modelling tools has been extended worldwide as they are relatively cheap and the field validation is expensive; however, they should be corroborated with experimental data [9].…”

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confidence: 99%

Full-scale reinforced concrete slabs: blast effects, damage characterization and numerical modelling

Castedo¹,

López²,

Chiquito³

et al. 2019

Int. J. SAFE

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This work investigates the response of a blast loaded reinforced slab with different constructive characteristics. This topic has been well covered during the last years, but there are a reduce number of them that presents blast test at realistic scale. Seven different slabs were tested: three at a scaled distance of 0.79 m/kg 1/3 , one at 0.41 m/kg 1/3 and four with 0.20 m/kg 1/3. The three tests with high-scaled distance, used as calibration tests, have been characterized with pressure gauges and accelerometers. These reinforced slabs are the same as the one of low-scaled distance and one of high-scaled distance. Finally, the two tests of low-scaled distance have different reinforcement: steel or polypropylene fibres. The blast effects over the slabs has been characterized with a non-destructive methodology based on the Schmidt hammer. The methodology consists on the evaluation of a statistically significant difference of six rebound values before and six after a blast event for each evaluation point, having 19 evaluation point for each slab face. based on each individual damage value, damage maps have been created using an interpolation tool. This methodology is very useful to quantify the non-visual damage of a structural element and to validate numerical modelling results. In this case, a 3D lagrangian simulation using the lS-DYNA code with the blast load routine called cONWEP was done. The results in the developed model are affected by the scaled distance and by the construction patterns. The blast resistance of the slabs were better when using steel or polypropylene fibres, especially under tensile stresses (bottom part of the slabs).

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An analytical description of the force–deflection diagram of FRC

Cited by 14 publications

References 21 publications

Numerical analysis of a bridge pier subjected to truck impact

Numerical analysis of a bridge pier subjected to truck impact

Blast performance of RC panels with waste steel fibers

Full-scale reinforced concrete slabs: blast effects, damage characterization and numerical modelling

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