Compressive behavior of UHPFRC under quasi-static and seismic strain rates considering the effect of fiber content

Krahl, Pablo Augusto; Gidrão, Gustavo de Miranda Saleme; Carrazedo, Ricardo

doi:10.1016/j.conbuildmat.2018.08.121

Cited by 27 publications

(7 citation statements)

References 26 publications

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“…5. As in the present study, Hassan et al (2012), Yang et al (2009), Thanh (2008), Wu et al (2016) and Lampropoulos et al (2016) were able to decrease the amount of cement and increase the compressive strength with the use of GGBS together with silica fume (SF). The use of these two industrial wastes allows for the densification of the matrix, the reduction of the heterogeneity of the concrete and makes it possible to add a high volume of fibers to the mix, if the ductility of the material is to be increased.…”

Section: Resultssupporting

confidence: 74%

Uniaxial tension– Compression behaviour of the UHPFRC using GGBS

Rojas

Yépez

Korzenowski

et al. 2022

CONJ

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The purpose of this study was to investigate the mechanical characteristics of Ultra-High Performance Fibre Reinforced Concrete (UHPFRC) under compression uniaxial loading conditions, using waste in the mixture. UHPFRC is a class of cementitious material with high durability and strength, limited to a minimum value of compressive strength of 150 MPa. The difference with traditional concrete lies mainly in the post-peak behaviour that occurs due to the presence of fibres, which are responsible for ensuring the ductile behaviour of the material. Uniaxial compression tests on twenty cylindrical specimens were carried out and tested after 28 days of curing, with a percentage of steel fibres of 1% at a displacement loading speed of 0.5 mm/min. The mixture design that was used allowed to manufacture a thixotropic material, characterized by a compressive strength and an average modulus of elasticity of 150.89 MPa and 47.71 GPa respectively. A simple production process was used, including Ground Granulated Blast Furnace Slag (GGBS) as the main sustainable material and as partial substitute for cement. Curves for design and structural analysis were plotted and compared with the average experimental curve and with other research consulted in the literature, including the elastic and inelastic behaviour of the material.

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Section: Resultssupporting

confidence: 74%

Uniaxial tension– Compression behaviour of the UHPFRC using GGBS

Rojas

Yépez

Korzenowski

et al. 2022

CONJ

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“…The spans of the beams are 3 meters, and the point load application and boundary conditions are described in Figure 3d. The UHPFRC characteristics used in this analytical-numerical model were adopted, according to Krahl et al [17], [18]. Table 1 presents the different material characteristics for UHPFRC produced by Krahl and Graybeal.…”

Section: Cases Of Studymentioning

confidence: 99%

“…For the three simulated I-beams (Figure 3c and 3d), the UHPFRC constitutive law written in terms of the inelastic strain is applied according to Figures 6a and 6b, and Krahl et al [17], [18]. Plasticity and elasticity parameters are given in Table 2; the design parameters and prestress load are presented in Table 1.…”

Section: Constitutive Model (I-beams)mentioning

confidence: 99%

“…Therefore, the following cases were studied in this paper: (I) Complete Graybeal model: force and displacements control, with constitutive law calibrated according to experimental results of Graybeal [16]; (II) Simplified Graybeal model: displacements control and simplified constitutive law based in the direct tensile tests; (III) I-beams: displacement control and constitutive law was given by Krahl et al [17], [18].…”

Section: Boundary Conditions Mesh and Loadmentioning

confidence: 99%

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Numerical modeling and design of precast prestressed UHPFRC I beams

Gidrão

Krahl

Carrazedo

2021

Rev. IBRACON Estrut. Mater.

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Ultra-high-performance fiber reinforced concrete (UHPFRC) is a new material developed to present superior properties, as high compressive strength (higher than 130 MPa), high durability, and satisfactory ductile behavior. This paper reports the procedure to design precast UHPFRC beams, subject to flexural loads. First, an I-girder AASHTO Type II was designed, and simulated. Next, I-beams with diverse depths and steel ratios were designed, and simulated considering a four-point bending load test. It was found that the classical design equations used to predict the strength bending moment (Mrd) showed good accuracy with the simulated models with a 4.5% error.

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“…UHPC could show compressive strength from 150 to 810 MPa, approximately 3 to 16 times as that of conventional concrete. With the addition of steel fiber, the ductility and energy dissipation of UHPC can be 300 times greater than that of high-performance concrete (Krahl et al, 2018; Shi et al, 2015; Wang et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

A review on seismic behavior of ultra-high performance concrete members

Fang

Shi

et al. 2020

Advances in Structural Engineering

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Ultra-high performance concrete (UHPC) is a type of cementitious composite, and demonstrates very high compressive strength and good ductility. The favorable ductility and energy dissipation capacity of UHPC material make it possible to achieve excellent seismic performance in all kinds of structural members. The paper reviewed the recent progress on the seismic behavior of UHPC members, including flexural members (beams and plates), compressive members (columns and shear walls), joints (beam-column joints and plate-column joints), strengthening (strengthening for columns, shear walls and joints) and connections (bar lap splice and grout). A series of potential future researches on the seismic behavior of UHPC members were finally suggested for promotion of the application of UHPC in civil engineering.

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Compressive behavior of UHPFRC under quasi-static and seismic strain rates considering the effect of fiber content

Cited by 27 publications

References 26 publications

Uniaxial tension– Compression behaviour of the UHPFRC using GGBS

Uniaxial tension– Compression behaviour of the UHPFRC using GGBS

Numerical modeling and design of precast prestressed UHPFRC I beams

A review on seismic behavior of ultra-high performance concrete members

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