A meso-mechanical model to simulate the tensile behaviour of ultra-high performance fibre-reinforced cementitious composites

Abrishambaf, Amin; Pimentel, Mário

doi:10.1016/j.compstruct.2019.110911

Cited by 43 publications

(30 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The post-cracking tensile strength of UHPFRC on a given i-direction, f Utu,i , is often estimated as

where τ f is the equivalent (rigid-plastic) fibre-to-matrix bond strength and

is the so-called ‘fibre structure parameter’ [ 11 , 21 , 28 ], which encompasses fibre parameters related to orientation (

), efficiency

, content (

) and geometry (l f /d f ).

can be obtained from the analysis of an image of the cross-section under consideration.…”

Section: Non-destructive Methodsmentioning

confidence: 99%

“…Consequently, NDT measuring points should be at a minimum distance of 100 mm from the sides of the test specimens/elements. Dog-bone or dumbbell shape specimens are often used in direct tensile tests to characterise the tensile behaviour of UHPFRC [11,12,28]. This type of specimen usually has reduced dimensions in its central part, making it impossible to comply with the recommended minimum distance between the measuring point and the sides of the specimen.…”

Section: Effect Of the Specimen Areamentioning

confidence: 99%

See 1 more Smart Citation

Key Factors for Implementing Magnetic NDT Method on Thin UHPFRC Bridge Elements

2021

Self Cite

View full text Add to dashboard Cite

This paper provides an overview of the use of the magnetic NDT method for estimating the fibre content, and fibre orientation and efficiency factors in thin UHPFRC elements/layers, along any two orthogonal directions. These parameters are of utmost importance for predicting the post-cracking tensile strength in the directions of interest. After establishing meaningful correlations at the lab-specimen scale, this NDT method can be effectively implemented into quality control protocols at the industrial production scale. The current study critically addresses the influence of key factors associated with using this NDT method in practice and provides recommendations for its efficient implementation.

show abstract

“…The post-cracking tensile strength of UHPFRC on a given i-direction, f Utu,i , is often estimated as

where τ f is the equivalent (rigid-plastic) fibre-to-matrix bond strength and

is the so-called ‘fibre structure parameter’ [ 11 , 21 , 28 ], which encompasses fibre parameters related to orientation (

), efficiency

, content (

) and geometry (l f /d f ).

can be obtained from the analysis of an image of the cross-section under consideration.…”

Section: Non-destructive Methodsmentioning

confidence: 99%

Section: Effect Of the Specimen Areamentioning

confidence: 99%

Key Factors for Implementing Magnetic NDT Method on Thin UHPFRC Bridge Elements

2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Defining the fibre efficiency factor, 1, as the expected value of the fibre efficiency function of the fibres crossing the fracture surface: (9) and considering the definition of 0 and f()…”

Section: Behaviour Of a Single Crackmentioning

confidence: 99%

Anisotropic tensile behaviour of UHPFRC: meso-scale model and experimental validation

Pimentel¹

2019

Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures

View full text Add to dashboard Cite

Ultra-High Performance Fibre-Reinforced cementitious Composites (UHPFRC) designates a family of materials constituted by a compact cementitious matrix reinforced with short high-strength steel fibres. A model is presented based on a meso-level description of the involved mechanics for simulating the direction-dependent tensile response of the UHPFRC. The determination of the relevant material properties and model parameters is discussed. The model is validated with a set of direct tensile tests performed on specimens with varying fibre content and orientation and is shown to be capable of simulating the full tensile responses of both strainsoftening and strain-hardening UHPFRCs. Finally, an outlook is given on how the meso-mechanical model can be used to provide the input parameters for the engineering stress-deformation curves describing the anisotropic tensile behaviour of the material and that are suitable for analysis and design of UHPFRC structures.

show abstract

“…Graybeal [6], Abrahimsof [8], Cao [9], McSwain [10], and Wille [11] investigated the pullout behaviour of embedded fibres in UHPC more fundamentally. The test programmes consisted of fibre pullout tests of embedded UHPC under monotonic loading with varying steel fibre geometries, UHPC-properties, and number of fibres.…”

Section: Introductionmentioning

confidence: 99%

Fundamental Investigations on the Performance of Micro Steel Fibres in Ultra-High-Performance Concrete under Monotonic and Cyclic Tensile Loading

Lanwer

Empelmann

2021

Applied Sciences

View full text Add to dashboard Cite

: Ultra-high-performance fibre-reinforced concrete (UHPFRC) can preferably be used for lean and thin-walled structures due to its very high compressive strength. Based on the adverse relation between the increased load bearing capacities and the condensed dead weight of UHPFRC-structures, the impact of live loads in the design gets bigger and, in case of traffic loads, the effects of a cyclic loading have to be considered in more detail. In this context, this study investigated the material behaviour of UHPFRC, especially the tensile fatigue behaviour of high-strength micro steel fibres and the bond behaviour between those fibres and plain UHPC. The test programme included once tensile tests of high-strength micro steel fibres under monotonic and cyclic loading. Based on the test results, an S/N-curve was set up with the characteristic values. Furthermore, the test programme included pullout tests of fibre groups with different embedded lengths and orientations under monotonic and cyclic loading. It was observed that some fibres rupture under certain test configurations like the angle of orientation and the load amplitude.

show abstract

A meso-mechanical model to simulate the tensile behaviour of ultra-high performance fibre-reinforced cementitious composites

Cited by 43 publications

References 34 publications

Key Factors for Implementing Magnetic NDT Method on Thin UHPFRC Bridge Elements

Key Factors for Implementing Magnetic NDT Method on Thin UHPFRC Bridge Elements

Anisotropic tensile behaviour of UHPFRC: meso-scale model and experimental validation

Fundamental Investigations on the Performance of Micro Steel Fibres in Ultra-High-Performance Concrete under Monotonic and Cyclic Tensile Loading

Contact Info

Product

Resources

About