On the dynamic response of reinforced concrete beams subjected to drop weight impact

To improve the impact resistance of reinforced concrete structures, a detailed understanding of the dynamic response is required. This study investigates this impact resistance using experiments in combination with 3D non-linear finite element (FE) simulations. The experiments made use of high-speed...

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Vydané v:Finite elements in analysis and design Ročník 180; s. 103438
Hlavní autori: Leppänen, Joosef, Johansson, Morgan, Grassl, Peter
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Amsterdam Elsevier B.V 01.11.2020
Elsevier BV
Predmet:
CDPM2
Concrete
Concrete structures
Constitutive models
Digital image correlation (DIC)
Digital imaging
Drop tests
Drop weight impact
Dynamic response
Experiments
Fiber reinforced concretes
Fibres
High speed photography
Impact resistance
Reinforced concrete
Weight
Fibres
Digital image correlation (DIC)
Concrete
CDPM2
Drop weight impact
ISSN:0168-874X, 1872-6925
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Shrnutí:To improve the impact resistance of reinforced concrete structures, a detailed understanding of the dynamic response is required. This study investigates this impact resistance using experiments in combination with 3D non-linear finite element (FE) simulations. The experiments made use of high-speed photography and digital image correlation (DIC), while a damage-plasticity constitutive model for concrete was used in the FE simulations. Drop weight impact tests of simply supported reinforced beams made of plain concrete and fibre reinforced concrete were made, and it was shown that the addition of fibres reduced crack spacing, crack widths and mid-point deflections. For the FE approach, tetrahedral elements were shown to be well suited for capturing inclined shear cracks and the structural response obtained in experiments and analyses agreed very well. The FE analyses showed that the reinforcement strains were more localised for concrete with fibres, and hence predicted an increased risk of reinforcement rupture. •Digital image correlation is a powerful tool for analysing drop weight impact tests.•The material model CDPM2 gives reliable results for impact loading.•Both bending and diagonal shear cracks can be captured well with tetrahedral elements.•Addition of fibres in the concrete mixture results in higher localised steel strains than beams without fibres.
Bibliografia:ObjectType-Article-1
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content type line 14
ISSN:0168-874X
1872-6925
DOI:10.1016/j.finel.2020.103438