Stefie J Stephen

@iitm.ac.in

Project Officer (Civil Engineering)
Indian Institute of Technology Madras, Chennai

Stefie J Stephen


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https://researchid.co/stefiejs
11

Scopus Publications

188

Scholar Citations

5

Scholar h-index

4

Scholar i10-index

Scopus Publications

  • EFFECT OF THERMOMECHANICALLY BENEFICIATED RECYCLED CONCRETE AGGREGATES ON THE MECHANICAL AND DURABILITY CHARACTERISTICS OF CONCRETE
    Indian Concrete Journal, 2023
  • DEVELOPMENT OF STRUCTURAL FORMS USING TEXTILE REINFORCED CONCRETE
    Indian Concrete Journal, 2023
  • Properties of Concrete with Thermo-mechanically Beneficiated Fine Recycled Aggregates
    Rohit Prajapati, Stefie J. Stephen, Ravindra Gettu, Surender Singh
    Rilem Bookseries, 2023
  • Influence of industrial wastes on the mechanical and durability characteristics of high strength concrete
    T. Balasubramaniam, Stefie J. Stephen
    Construction and Building Materials, 2022
  • Determination of the complete stress-strain response of concrete under uniaxial compression
    Indian Concrete Journal, 2021
  • Incorporation of Rate-Dependent Fracture Properties in the Design of Precast Concrete Tunnel Segment with Hybrid Reinforcement
    Stefie J. Stephen, Ravindra Gettu
    Rilem Bookseries, 2021
  • Influence of Fibre Geometry on the Fracture of Steel Fibre Reinforced Concrete
    Komathi Murugan, Stefie J Stephen, Ravindra Gettu
    Iop Conference Series Materials Science and Engineering, 2020
  • Fatigue fracture of fibre reinforced concrete in flexure
    Stefie J. Stephen, Ravindra Gettu
    Materials and Structures Materiaux Et Constructions, 2020
    An experimental study on the behaviour of fibre reinforced concrete under flexure is presented, where pre-cracked notched beams were tested under cyclic loading for concrete with different dosages of hooked-ended steel fibres. The fatigue crack growth and stiffness degradation during the cycles are discussed in term of the rate of evolution of crack opening, and the critical crack opening is identified, beyond which the crack growth becomes unstable. S – N curves have been proposed with respect to the critical crack opening as these would be more relevant to design avoiding sudden failure. It is evident that higher dosages of fibres improve the fatigue life of cracked concrete only when the magnitudes of the cyclic loading are high, and that the effect of dosage is insignificant at lower magnitudes. For the fibre concretes considered here, the endurance limit seems to be about 50% of the pre-crack load in the post-peak regime.
  • Rate-dependence of the tensile behaviour of fibre reinforced concrete in the quasi-static regime
    Stefie J. Stephen, Ravindra Gettu
    Materials and Structures Materiaux Et Constructions, 2019
    The effect of crack rate on the tensile stress–crack width relation of fibre reinforced concrete is studied experimentally, using the three-point bending test, where the post-peak flexural response of the material is determined over a range of loading rates covering 5 orders of magnitude. The tetralinear stress–crack opening (σ–w) relations are subsequently obtained from inverse analyses. Concretes with hooked-ended steel fibres at different dosages and with polypropylene fibres have been studied. The results show that the tensile strength is reduced and the initial drop in cohesive stresses is less steep at slower loading rates, with the changes being more significant in concretes with lower toughness. Numerical analysis shows that the fracture process zone at crack initiation extends further as the loading becomes slower. The variation in the σ–w relation with crack rate has been modelled empirically based on the rate-dependence of the concrete matrix and the tensile strength of the FRC. The general variation of flexural toughness with the loading rate has also been identified, reflecting the moderating influence due to steel fibres, especially at higher dosages.
  • Determination of the tensile constitutive relations of fiber reinforced concrete using inverse analysis
    Stefie J. Stephen, Benny Raphael, Ravindra Gettu, Sujatha Jose
    Construction and Building Materials, 2019
    Fracture in fiber reinforced concrete involves the development of bridging stresses along the cracked faces, which is characterized in this work through a cracked hinge model. Closed-form solutions for the response have been developed using the analytical formulation for the three-point bending test of concrete considering a multi-linear stress-crack opening (σ-w) curve. A global optimization algorithm is used to determine the tensile constitutive relation represented by the σ-w curve, by identifying the parameters that provide the best fit with the load versus crack mouth opening displacement curve obtained. The ability of the model to give representative and unambiguous results has been assessed in terms of robustness and accuracy of fitting. The procedure has been applied for determining the tensile constitutive relations of steel and polymer fiber reinforced concrete with both softening and hardening-type behavior. The parameters thus obtained have been used to predict the response of different geometries of beams to assess the applicability of the methodology.
  • Assessment of the toughness of fibre-reinforced concrete using the R-curve approach
    Stefie J Stephen, Ravindra Gettu, Luiz Eduardo Teixeira Ferreira, Sujatha Jose
    Sadhana Academy Proceedings in Engineering Sciences, 2018

RECENT SCHOLAR PUBLICATIONS

  • Implications of time-dependent tensile response in the design of concrete tunnel segments with hybrid reinforcement
    SJ Stephen, R Gettu
    Research Data and Reports 2 (1) , 2026
    2026.0
  • EFFECT OF THERMOMECHANICALLY BENEFICIATED RECYCLED CONCRETE AGGREGATES ON THE MECHANICAL AND DURABILITY CHARACTERISTICS OF CONCRETE
    SJ STEPHEN, R GETTU, S SINGH
    INDIAN CONCRETE JOURNAL , 2023
    2023.0
  • Development of structural forms using textile reinforced concrete
    SJ STEPHEN, R GETTU, RL ZERBINO
    Indian Concrete Journal , 2023
    2023.0
    Citations: 5
  • Influence of industrial wastes on the mechanical and durability characteristics of high strength concrete
    T Balasubramaniam, SJ Stephen
    Construction and Building Materials 317, 126202 , 2022
    2022.0
    Citations: 16
  • Properties of Concrete with Thermo-mechanically Beneficiated Fine Recycled Aggregates
    R Prajapati, SJ Stephen, R Gettu, S Singh
    RILEM Annual Week, 916-922 , 2021
    2021.0
  • Determination of the complete stress-strain response of concrete under uniaxial compression
    S Stephen, E Zangelmi Júnior, R Gettu, A Aguado de Cea, V Kumar
    Indian concrete journal 95 (9), 1-13 , 2021
    2021.0
    Citations: 3
  • Incorporation of Rate-Dependent Fracture Properties in the Design of Precast Concrete Tunnel Segment with Hybrid Reinforcement
    SJ Stephen, R Gettu
    RILEM-fib International Symposium on Fibre Reinforced Concrete, 770-775 , 2020
    2020.0
  • Influence of fibre geometry on the fracture of steel fibre reinforced concrete
    K Murugan, SJ Stephen, R Gettu
    IOP Conference Series: Materials Science and Engineering 936 (1), 012025 , 2020
    2020.0
    Citations: 3
  • sigw-Concrete©
    SJ Stephen, R Gettu, B Raphael
    IN Patent SW-13538/2,020 , 2020
    2020.0
  • Relación constitutiva en tracción y diseño structural (Constitutive Relation in Tension and Structural Design)
    SJ Stephen, R Gettu
    Hormigón Reforzado con Fibras, 127-144 , 2020
    2020.0
  • Fatigue fracture of fibre reinforced concrete in flexure
    SJ Stephen, R Gettu
    Materials and Structures 53, 56 , 2020
    2020.0
    Citations: 67
  • Rate-dependence of the tensile behaviour of fibre reinforced concrete in the quasi-static regime
    SJ Stephen, R Gettu
    Materials and Structures 52 (5), 107 , 2019
    2019.0
    Citations: 23
  • Determination of the tensile constitutive relations of fiber reinforced concrete using inverse analysis
    SJ Stephen, B Raphael, R Gettu, S Jose
    Construction and building materials 195, 405-414 , 2019
    2019.0
    Citations: 57
  • Incorporation of time-dependent fracture behaviour in the structural design of fibre reinforced concrete elements
    SJ Stephen
    Indian Institute of Technology Madras , 2019
    2019.0
    Citations: 1
  • Assessment of the toughness of fibre-reinforced concrete using the R-curve approach
    SJ Stephen, R Gettu, LET Ferreira, S Jose
    Sādhanā 43 (3), 46 , 2018
    2018.0
    Citations: 7
  • Effect of loading rate on the fracture behavior of fibre reinforced concrete
    SJ Stephen, R Gettu, B Raphael
    9th international conference on fracture mechanics of concrete and concrete … , 2016
    2016.0
    Citations: 3
  • Study of the post-cracking behavior of steel and polymer fibre reinforced concretes
    S Jose, SJ Stephen, R Gettu
    2nd RN Raikar Memorial Biennial International Conferences & ‘Banthia–Basheer … , 2015
    2015.0
    Citations: 3
  • OBTAINING FRACTURE PROPERTIES OF FRC BY INVERSE ANALYSIS USING THE PGSL OPTIMIZATION ALGORITHM
    SJ STEPHEN, B RAPHAEL, R GETTU

MOST CITED SCHOLAR PUBLICATIONS

  • Fatigue fracture of fibre reinforced concrete in flexure
    SJ Stephen, R Gettu
    Materials and Structures 53, 56 , 2020
    2020.0
    Citations: 67
  • Determination of the tensile constitutive relations of fiber reinforced concrete using inverse analysis
    SJ Stephen, B Raphael, R Gettu, S Jose
    Construction and building materials 195, 405-414 , 2019
    2019.0
    Citations: 57
  • Rate-dependence of the tensile behaviour of fibre reinforced concrete in the quasi-static regime
    SJ Stephen, R Gettu
    Materials and Structures 52 (5), 107 , 2019
    2019.0
    Citations: 23
  • Influence of industrial wastes on the mechanical and durability characteristics of high strength concrete
    T Balasubramaniam, SJ Stephen
    Construction and Building Materials 317, 126202 , 2022
    2022.0
    Citations: 16
  • Assessment of the toughness of fibre-reinforced concrete using the R-curve approach
    SJ Stephen, R Gettu, LET Ferreira, S Jose
    Sādhanā 43 (3), 46 , 2018
    2018.0
    Citations: 7
  • Development of structural forms using textile reinforced concrete
    SJ STEPHEN, R GETTU, RL ZERBINO
    Indian Concrete Journal , 2023
    2023.0
    Citations: 5
  • Determination of the complete stress-strain response of concrete under uniaxial compression
    S Stephen, E Zangelmi Júnior, R Gettu, A Aguado de Cea, V Kumar
    Indian concrete journal 95 (9), 1-13 , 2021
    2021.0
    Citations: 3
  • Influence of fibre geometry on the fracture of steel fibre reinforced concrete
    K Murugan, SJ Stephen, R Gettu
    IOP Conference Series: Materials Science and Engineering 936 (1), 012025 , 2020
    2020.0
    Citations: 3
  • Effect of loading rate on the fracture behavior of fibre reinforced concrete
    SJ Stephen, R Gettu, B Raphael
    9th international conference on fracture mechanics of concrete and concrete … , 2016
    2016.0
    Citations: 3
  • Study of the post-cracking behavior of steel and polymer fibre reinforced concretes
    S Jose, SJ Stephen, R Gettu
    2nd RN Raikar Memorial Biennial International Conferences & ‘Banthia–Basheer … , 2015
    2015.0
    Citations: 3
  • Incorporation of time-dependent fracture behaviour in the structural design of fibre reinforced concrete elements
    SJ Stephen
    Indian Institute of Technology Madras , 2019
    2019.0
    Citations: 1
  • Implications of time-dependent tensile response in the design of concrete tunnel segments with hybrid reinforcement
    SJ Stephen, R Gettu
    Research Data and Reports 2 (1) , 2026
    2026.0
  • EFFECT OF THERMOMECHANICALLY BENEFICIATED RECYCLED CONCRETE AGGREGATES ON THE MECHANICAL AND DURABILITY CHARACTERISTICS OF CONCRETE
    SJ STEPHEN, R GETTU, S SINGH
    INDIAN CONCRETE JOURNAL , 2023
    2023.0
  • Properties of Concrete with Thermo-mechanically Beneficiated Fine Recycled Aggregates
    R Prajapati, SJ Stephen, R Gettu, S Singh
    RILEM Annual Week, 916-922 , 2021
    2021.0
  • Incorporation of Rate-Dependent Fracture Properties in the Design of Precast Concrete Tunnel Segment with Hybrid Reinforcement
    SJ Stephen, R Gettu
    RILEM-fib International Symposium on Fibre Reinforced Concrete, 770-775 , 2020
    2020.0
  • sigw-Concrete©
    SJ Stephen, R Gettu, B Raphael
    IN Patent SW-13538/2,020 , 2020
    2020.0
  • Relación constitutiva en tracción y diseño structural (Constitutive Relation in Tension and Structural Design)
    SJ Stephen, R Gettu
    Hormigón Reforzado con Fibras, 127-144 , 2020
    2020.0
  • OBTAINING FRACTURE PROPERTIES OF FRC BY INVERSE ANALYSIS USING THE PGSL OPTIMIZATION ALGORITHM
    SJ STEPHEN, B RAPHAEL, R GETTU