TY - GEN
T1 - Modeling the Compressive Behavior of Steel Fiber Reinforced Concrete Under High Strain Rate Loads
AU - Ramezansefat, Honeyeh
AU - Rezazadeh, Mohammadali
AU - Barros, Joaquim A.O.
AU - Valente, Isabel B.
AU - Bakhshi, Mohammad
N1 - Funding Information:
The study reported in this paper is part of the project ?PufProtec-Prefabricated Urban Furniture Made by Advanced Materials for Protecting Public Built? with the reference of (POCI-01-0145-FEDER-028256) supported by FEDER and FCT funds. The second author also acknowledges the support provided by FEDER and FCT funds within the scope of the project StreColesf (POCI-01-0145-FEDER-029485).
Funding Information:
Acknowledgements. The study reported in this paper is part of the project “PufProtec - Prefabricated Urban Furniture Made by Advanced Materials for Protecting Public Built” with the reference of (POCI-01-0145-FEDER-028256) supported by FEDER and FCT funds. The second author also acknowledges the support provided by FEDER and FCT funds within the scope of the project StreColesf (POCI-01-0145-FEDER-029485).
PY - 2021
Y1 - 2021
N2 - Concrete is a strain-rate sensitive material and shows relatively low ductility and energy dissipation capacity under high strain rate loads (HSRL) such as blast and impact, representative of terrorist attacks and accidents. Experimental research in the literature has evidenced that introducing steel fibers, into the concrete mixtures can significantly improve the concrete behavior under HSRL. Besides the experimental research, development of design models is an important aspect to provide more confidence for engineers to use SFRC in structural elements when subjected to HSRL. The existing design codes (e.g. CEB-FIP Model Code 1990 and fib Model Code 2010) propose models for the prediction of the strengths of concrete under different HSRL, but they are only function of strain rate. In this regard, the current paper deals with the improvement of design models in the fib Model Code 2010 for the prediction of the compressive behavior of SFRC by considering the effects of the important parameters such as volume fraction, aspect ratio and tensile strength of steel fibers, and concrete compressive strength, besides the strain rate effect. The developed artificial neural network mathematical model is calibrated and its predictive performance is assessed using a database collected from the existing compressive impact tests results on SFRC specimens.
AB - Concrete is a strain-rate sensitive material and shows relatively low ductility and energy dissipation capacity under high strain rate loads (HSRL) such as blast and impact, representative of terrorist attacks and accidents. Experimental research in the literature has evidenced that introducing steel fibers, into the concrete mixtures can significantly improve the concrete behavior under HSRL. Besides the experimental research, development of design models is an important aspect to provide more confidence for engineers to use SFRC in structural elements when subjected to HSRL. The existing design codes (e.g. CEB-FIP Model Code 1990 and fib Model Code 2010) propose models for the prediction of the strengths of concrete under different HSRL, but they are only function of strain rate. In this regard, the current paper deals with the improvement of design models in the fib Model Code 2010 for the prediction of the compressive behavior of SFRC by considering the effects of the important parameters such as volume fraction, aspect ratio and tensile strength of steel fibers, and concrete compressive strength, besides the strain rate effect. The developed artificial neural network mathematical model is calibrated and its predictive performance is assessed using a database collected from the existing compressive impact tests results on SFRC specimens.
KW - Design model
KW - Drop-weight impact test
KW - High strain rate load
KW - Steel fiber reinforced concrete
UR - http://www.scopus.com/inward/record.url?scp=85097225265&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-58482-5_63
DO - 10.1007/978-3-030-58482-5_63
M3 - Conference contribution
AN - SCOPUS:85097225265
SN - 9783030584818
SN - 9783030584849
VL - 30
T3 - RILEM Bookseries
SP - 703
EP - 713
BT - Fibre Reinforced Concrete
A2 - Serna, Pedro
A2 - Llano-Torre, Aitor
A2 - Martí-Vargas, José R.
A2 - Navarro-Gregori, Juan
PB - Springer
CY - Cham
T2 - RILEM-fib International Symposium on FRC, BEFIB 2020
Y2 - 21 September 2020 through 23 September 2020
ER -