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Shear capacity of HPFRC beams flexurally reinforced with steel and prestressed ...
Soltanzadeh, Fatemeh; Mazaheripour, H.; Barros, Joaquim A. O.; Sena-Cruz, JoséThis paper presents the relevant results from an experimental program to assess the shear capacity of high performance fiber reinforced concrete (HPFRC) beams flexurally reinforced with a hybrid system of passive steel and prestressed GFRP longitudinal bars. Three series of two beams with different level of prestressing were tested. The effect of prestressing level on the shear capacity of the beams was the mai...
Steel fibre reinforced concrete for elements failing in bending and in shear
Barros, Joaquim A. O.; Lourenço, Lúcio; Soltanzadeh, Fatemeh; Taheri, MahsaDiscrete steel fibres can increase significantly the bending and the shear resistance of concrete structural elements when Steel Fibre Reinforced Concrete (SFRC) is designed in such a way that fibre reinforcing mechanisms are optimized. To assess the fibre reinforcement effectiveness in shallow structural elements failing in bending and in shear, experimental and numerical research were performed. Uniaxial comp...
Analytical bond model for GFRP bars to steel fiber reinforced self-compacting c...
Mazaheripour, H.; Barros, Joaquim A. O.; Sena-Cruz, José; Soltanzadeh, FatemehThe objective of this study is to present a computational algorithm to analytically evaluate the bond behavior between GFRP bar and steel fiber reinforced self-compacting concrete (SFRSCC). The type of information to be derived is appropriate to study the flexural behavior of SFRSCC beams reinforced with GFRP bars in terms of serviceability limit states requirements; in fact the bond between bars and surroundin...
Study of the fracture behaviour of fiber reinforced concrete under direct shear...
Soltanzadeh, Fatemeh; Barros, Joaquim A. O.; Santos, Rafael Francisco CardosoReport 12-DEC/E-18 ; The behavior of Fiber Reinforced Concrete (FRC) under Mode II of fracture is rarely reported due to the lack of information on standard testing procedures. Between the few numbers of researches performed to characterize the shear behavior of concrete, no one have dedicated to the effects of fiber orientation at different places of a concrete element subjected to second mode of fracture...
Interfacial bond behaviour of GFRP bar in self-compacting fiber reinforced conc...
Mazaheripour, H.; Barros, Joaquim A. O.; Soltanzadeh, Fatemeh; Gonçalves, DelfinaIn an ongoing research project, discrete steel fibers are being used in a self-compacting concrete (SFRSCC) to replace completely steel stirrups for pre-fabricated beams reinforced longitudinally with pre-stressed glass fiber reinforced polymer (GFRP) and steel bars. To take the advantages of the non-corrodible character and high tensile strength of GFRP bars, the minimum SFRSCC cover needs to be determine...
Steel fiber reinforced self-compacting concrete : from material to mechanical b...
Soltanzadeh, Fatemeh; Barros, Joaquim A. O.; Santos, Rafael Francisco CardosoReport: 12-DEC/E-19 ; This study is a part of the research project entitled “DURCOST – Innovation in reinforcing systems for sustainable prefabricated structures of higher durability and enhanced structural performance” supported by the FCT, PTDC/ECM/105700/2008.
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