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Dr. Fatemeh Soltanzadeh
ISISE, Department of Civil Engineering, School of Engineering, University of Minho, 4800-058 Guimarães, Portugal

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0 Waste Management
0 Fiber Reinforced Concrete
0 Materials engineering
0 concrete structures
0 Cement replacement

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Journal article
Published: 21 August 2019 in Construction and Building Materials
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The post-cracking tensile properties of steel fiber reinforced concrete (SFRC) is one of the most important aspects that should be considered in design of SFRC structural members. The parameters that describe the post-cracking behavior of SFRC in tension are often derived using indirect methods combined with inverse analysis techniques applied to the results obtained from three- or four-point prism bending tests or from determinate round panel tests. However, there is still some uncertainty regarding the most reliable methodology for evaluating the post-cracking behavior of SFRC. In the present study a steel fiber reinforced self-compacting concrete (SFRSCC) was developed and its post-cracking behavior was investigated through an extensive experimental program composed of small determinate round panel and prism bending tests. Based on the results obtained from this experimental program, the constitutive tensile laws of the developed SFRSCC were obtained indirectly using two numerical approaches, as well as three available analytical approaches based on standards for estimating the stress versus crack width relationship (σ-w). The predictive performance of both the numerical and analytical approaches employed for estimating the σ-w relationship of the SFRSCC was assessed. The numerical simulations have provided a good prediction of the post-cracking behavior of the concrete. All the analytical formulations also demonstrated an acceptable accuracy for design purposes. Anyhow, among all the employed approaches, the one that considers the results of small determinate round panel tests (rather than that of prism bending tests) has predicted more accurately the constitutive tensile laws of the SFRSCC.

ACS Style

Fatemeh Soltanzadeh; Vitor Cunha; Joaquim Barros. Assessment of different methods for characterization and simulation of post-cracking behavior of self-compacting steel fiber reinforced concrete. Construction and Building Materials 2019, 227, 116704 .

AMA Style

Fatemeh Soltanzadeh, Vitor Cunha, Joaquim Barros. Assessment of different methods for characterization and simulation of post-cracking behavior of self-compacting steel fiber reinforced concrete. Construction and Building Materials. 2019; 227 ():116704.

Chicago/Turabian Style

Fatemeh Soltanzadeh; Vitor Cunha; Joaquim Barros. 2019. "Assessment of different methods for characterization and simulation of post-cracking behavior of self-compacting steel fiber reinforced concrete." Construction and Building Materials 227, no. : 116704.

Journal article
Published: 01 February 2018 in Construction and Building Materials
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ACS Style

Fatemeh Soltanzadeh; Mojtaba Emam-Jomeh; Ali Edalat-Behbahani; Zahra Soltan-Zadeh. Development and characterization of blended cements containing seashell powder. Construction and Building Materials 2018, 161, 292 -304.

AMA Style

Fatemeh Soltanzadeh, Mojtaba Emam-Jomeh, Ali Edalat-Behbahani, Zahra Soltan-Zadeh. Development and characterization of blended cements containing seashell powder. Construction and Building Materials. 2018; 161 ():292-304.

Chicago/Turabian Style

Fatemeh Soltanzadeh; Mojtaba Emam-Jomeh; Ali Edalat-Behbahani; Zahra Soltan-Zadeh. 2018. "Development and characterization of blended cements containing seashell powder." Construction and Building Materials 161, no. : 292-304.

Journal article
Published: 29 July 2016 in Engineering Structures
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In the present work, the deflection and cracking behavior of I-shaped cross-sectional beams of Steel Fiber Reinforced Self-Compacting Concrete (SFRSCC) reinforced in flexure with hybrid prestressed steel strand and glass fiber reinforced polymer (GFRP) bars was investigated. Combining prestressed GFRP bars of relatively low elasticity modulus, but immune to corrosion (located with a small concrete cover), with prestressed steel strand (with higher concrete cover to avoid corrosion), a good balance in terms of reinforcement effectiveness, ductility, durability and cost competitiveness can be obtained. The steel strand aims also to assure the necessary flexural strengthening of the beams if GFRP bars become ineffective in case of fire occurrence. This work presents and discusses the results obtained from the experimental study of the beams tested in flexure under monotonic loading conditions. Additionally, the predictive performance of the available formulation in the design codes for the case of Fiber Reinforced Concrete (FRC) and FRP Reinforced Concrete (FRP-RC) was assessed to be used for the proposed hybrid system.

ACS Style

H. Mazaheripour; J.A.O. Barros; F. Soltanzadeh; J. Sena-Cruz. Deflection and cracking behavior of SFRSCC beams reinforced with hybrid prestressed GFRP and steel reinforcements. Engineering Structures 2016, 125, 546 -565.

AMA Style

H. Mazaheripour, J.A.O. Barros, F. Soltanzadeh, J. Sena-Cruz. Deflection and cracking behavior of SFRSCC beams reinforced with hybrid prestressed GFRP and steel reinforcements. Engineering Structures. 2016; 125 ():546-565.

Chicago/Turabian Style

H. Mazaheripour; J.A.O. Barros; F. Soltanzadeh; J. Sena-Cruz. 2016. "Deflection and cracking behavior of SFRSCC beams reinforced with hybrid prestressed GFRP and steel reinforcements." Engineering Structures 125, no. : 546-565.

Journal article
Published: 09 July 2016 in Composites Part B: Engineering
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Corrosion of steel reinforcements embedded in concrete elements is generally known as one of the most common reasons that shorten the service life of the structures. The present study aims to contribute in overcoming this problem by replacing steel stirrups as shear reinforcement of concrete beams using a steel fiber reinforced self-compacting concrete (SFRSCC). In the present research the potential of SFRSCC for improving the shear resistance of the beams without stirrups is explored. In order to further reduce the risk of corrosion in this type of beams, a hybrid system of flexural reinforcement composed of a steel strand and GFRP rebars is applied and properly arranged in order to assure a relatively thick concrete cover for the steel reinforcement. The GFRP bars are placed with the minimum cover thickness for providing the maximum internal arm and, consequently, mobilizing efficiently their relatively high tensile strength. The effectiveness of applying different dosages of steel fibers and varying the prestress force to improve the shear behavior of the designed beam are evaluated. By considering the obtained experimental results, the predictive performance of a constitutive model (plastic-damage multidirectional fixed smeared crack model) implemented in a FEM-based computer program, as well as the one from three analytical formulations for estimating shear resistance of the developed beams were assessed. The FEM-based simulations have provided a good prediction of the deformational response and cracking behavior of the tested beams. All the analytical formulations demonstrated acceptable accuracy for design purposes, but the one proposed by CEB-FIP Modal Code 2010 predicts more conservative shear resistance.

ACS Style

Fatemeh Soltanzadeh; Ali Edalat-Behbahani; Joaquim A.O. Barros; Hadi Mazaheripour. Effect of fiber dosage and prestress level on shear behavior of hybrid GFRP-steel reinforced concrete I-shape beams without stirrups. Composites Part B: Engineering 2016, 102, 57 -77.

AMA Style

Fatemeh Soltanzadeh, Ali Edalat-Behbahani, Joaquim A.O. Barros, Hadi Mazaheripour. Effect of fiber dosage and prestress level on shear behavior of hybrid GFRP-steel reinforced concrete I-shape beams without stirrups. Composites Part B: Engineering. 2016; 102 ():57-77.

Chicago/Turabian Style

Fatemeh Soltanzadeh; Ali Edalat-Behbahani; Joaquim A.O. Barros; Hadi Mazaheripour. 2016. "Effect of fiber dosage and prestress level on shear behavior of hybrid GFRP-steel reinforced concrete I-shape beams without stirrups." Composites Part B: Engineering 102, no. : 57-77.

Journal article
Published: 08 December 2015 in Composite Structures
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Corrosion of steel reinforcements, especially stirrups, is considered as one of the most common reasons that shorten the service life of the reinforced concrete structures. This study aims to replace the stirrups of the beams by means of a tailor made steel fiber reinforced self-compacting concrete (SFRSCC). A hybrid flexural reinforcement system was used for all these beams, composed of glass fiber reinforced polymer (GFRP) rebars placed near to the outer surface of the tensile zone and steel reinforcements positioned with higher SFRSCC cover to be protected against the corrosion, which is considered another strategy for enhancing the durability and attending fire issues in terms of safety at ultimate limit states. The effectiveness of varying the prestressing force applied to GFRP bars to improve the shear capacity and failure mode of the designed elements is evaluated. By considering the obtained experimental results, the predictive performance of some analytical formulations for the shear resistance of fiber reinforced concrete beams was assessed. All formulations demonstrate acceptable accuracy for design purposes, but the one proposed by CEB-FIP Model Code 2010 predicts more conservative shear resistance.

ACS Style

Fatemeh Soltanzadeh; Ali Edalat Behbahani; Hadi Mazaheripour; Joaquim A.O. Barros. Shear resistance of SFRSCC short-span beams without transversal reinforcements. Composite Structures 2015, 139, 42 -61.

AMA Style

Fatemeh Soltanzadeh, Ali Edalat Behbahani, Hadi Mazaheripour, Joaquim A.O. Barros. Shear resistance of SFRSCC short-span beams without transversal reinforcements. Composite Structures. 2015; 139 ():42-61.

Chicago/Turabian Style

Fatemeh Soltanzadeh; Ali Edalat Behbahani; Hadi Mazaheripour; Joaquim A.O. Barros. 2015. "Shear resistance of SFRSCC short-span beams without transversal reinforcements." Composite Structures 139, no. : 42-61.

Review article
Published: 03 January 2015 in Construction and Building Materials
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High performance fiber reinforced concrete (HPFRC) is developing rapidly to a modern structural material with unique rheological and mechanical characteristics. Despite applying several methodologies to achieve self-compacting requirements, some doubts still remain regarding the most convenient strategy for developing a HPFRC. In the present study, an innovative mix design method is proposed for the development of high-performance concrete reinforced with a relatively high dosage of steel fibers. The material properties of the developed concrete are assessed, and the concrete structural behavior is characterized under compressive, flexural and shear loading. This study better clarifies the significant contribution of fibers for shear resistance of concrete elements. This paper further discusses a FEM-based simulation, aiming to address the possibility of calibrating the constitutive model parameters related to fracture modes I and II.

ACS Style

Fatemeh Soltanzadeh; Joaquim Barros; R.F.C. Santos. High performance fiber reinforced concrete for the shear reinforcement: Experimental and numerical research. Construction and Building Materials 2015, 77, 94 -109.

AMA Style

Fatemeh Soltanzadeh, Joaquim Barros, R.F.C. Santos. High performance fiber reinforced concrete for the shear reinforcement: Experimental and numerical research. Construction and Building Materials. 2015; 77 ():94-109.

Chicago/Turabian Style

Fatemeh Soltanzadeh; Joaquim Barros; R.F.C. Santos. 2015. "High performance fiber reinforced concrete for the shear reinforcement: Experimental and numerical research." Construction and Building Materials 77, no. : 94-109.

Journal article
Published: 01 December 2013 in Journal of Composites for Construction
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The objective of this study is to present a computational algorithm to analytically evaluate the bond behavior between glass fiber reinforced polymer (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 surrounding concrete influences significantly the crack width and crack spacing. The proposed bond model was established by calibrating the parameters of a multilinear bond-slip constitutive law using the experimental results of pullout bending tests carried out by the authors, taking into account the experimental pullout force versus slip at loaded and free ends. According to the comparison between theoretical and experimental pullout force-slip, an acceptable accuracy of the model was observed. Additionally, by considering the proposed bond-slip relationship, a parametric study was carried out to evaluate the influence of the involved bond-slip law’s parameters on the maximum force transferred to the surrounding concrete. Finally, the development length of two GFRP bars utilized in the experiments (deformed and smooth bars) was determined by means of the proposed model, and it was compared with the values recommended by codes.

ACS Style

Hadi Mazaheripour; Joaquim A. O. Barros; José Sena-Cruz; Fatemeh Soltanzadeh. Analytical Bond Model for GFRP Bars to Steel Fiber Reinforced Self-Compacting Concrete. Journal of Composites for Construction 2013, 17, 04013009 .

AMA Style

Hadi Mazaheripour, Joaquim A. O. Barros, José Sena-Cruz, Fatemeh Soltanzadeh. Analytical Bond Model for GFRP Bars to Steel Fiber Reinforced Self-Compacting Concrete. Journal of Composites for Construction. 2013; 17 (6):04013009.

Chicago/Turabian Style

Hadi Mazaheripour; Joaquim A. O. Barros; José Sena-Cruz; Fatemeh Soltanzadeh. 2013. "Analytical Bond Model for GFRP Bars to Steel Fiber Reinforced Self-Compacting Concrete." Journal of Composites for Construction 17, no. 6: 04013009.