Title:
A Model to Predict the Crack Width of FRC Members Reinforced with Longitudinal Bars
Author(s):
J.A.O. Barros, M. Taheri, H. Salehian
Publication:
Symposium Paper
Volume:
319
Issue:
Appears on pages(s):
2.1-2.16
Keywords:
Crack width, fiber reinforced concrete (FRC), flexural elements, reinforced FRC elements
DOI:
10.14359/51700851
Date:
6/1/2017
Abstract:
A hybrid analytical/numerical approach for the evaluation of the moment-rotation behavior of a cross section of fiber reinforced concrete (FRC) elements flexurally reinforced with longitudinal bars is briefly described. This model is applied to FRC elements failing in bending, and considers the constitutive laws of the constituent materials, where a special focus on the simulation of the post-cracking tensile behavior of FRC was given, as well as the bond behavior between flexural reinforcement and surrounding FRC. The predictive performance of the proposed model is assessed by simulating experimentally tested FRC beams of different
geometry, fiber content, and longitudinal reinforcement ratio. Furthermore, the predictive performance of RILEM
TC 162 TDF and fib Model Code 2010 design guidelines for the prediction of the crack width in FRC elements failing in bending is also discussed in the present work. The potentiality of the developed model is then explored for the assessment of the influence of toughness classes of FRC and the bond stiffness between flexural
reinforcement and surrounding FRC on the moment-crack opening response of FRC flexural members.
Related References:
1. Soranakom, C. and Mobasher, B., Correlation of tensile and flexural responses of strain softening and strainhardening cement composites. Cement and Concrete Composites, 2008. 30(6): p. 465-477.
2. Laranjeira, F., Design-oriented constitutive model for steel fiber reinforced concrete. 2010, UniversitatPolitècnica de Catalunya.
3. Chiaia, B., Fantilli, A.P., and Vallini, P., Evaluation of crack width in FRC structures and application totunnel linings. Materials and Structures, 2008. 42(3): p. 339.
4. Barros, J.A.O., Taheri, M., Salehian, H., and Mendes, P.J.D., A design model for fibre reinforced concretebeams pre-stressed with steel and FRP bars. Composite Structures, 2012. 94(8): p. 2494-2512.
5. Casanova, P., Rossi, P., and Schaller, l., Can Steel Fibers Replace Transverse Reinforcements in ReinforcedConcrete Beams? Materials Journal, 1997. 94(5): p. 341-354.
6. Meda, A., Minelli, F., Plizzari, G.A., and Riva, P., Shear behaviour of steel fibre reinforced concrete beams.Materials and Structures, 2005. 38(3): p. 343-351.
7. Barros, J.A.O., Moraes Neto, B.N., Melo, G.S.S.A., and Frazão, C.M.V., Assessment of the effectiveness ofsteel fibre reinforcement for the punching resistance of flat slabs by experimental research and designapproach. Composites Part B: Engineering, 2015. 78: p. 8-25.
8. Barros, J.A.O., Taheri, M., and Salehian, H., A model to simulate the moment–rotation and crack width ofFRC members reinforced with longitudinal bars. Engineering Structures, 2015. 100(0): p. 43-56.
9. fib Model Code 2010. 2011: CEB and FIP - Final Draft.
10. Vandewalle, et al., RILEM TC 162-TDF: Test and design methods for steel fibre reinforced concrete, s-edesign method - Final Recommendation. Materials and Structures, 2003. 36(October 2003): p. 560-567.
11. Taheri, M., Barros, J.A.O., and Salehian, H., Parametric Study of the Use of Strain Softening/Hardening FRCfor RC Elements Failing in Bending. Journal of Materials in Civil Engineering 2012. 24(3): p. 259-274.
12. Salehian, H. and Barros, J.A.O., Assessment of the performance of steel fibre reinforced self-compactingconcrete in elevated slabs. Cement and Concrete Composites, 2015. 55(0): p. 268-280.
13. Pereira, E., Barros, J., and Camões, A., Steel Fiber-Reinforced Self-Compacting Concrete: ExperimentalResearch and Numerical Simulation. Journal of Structural Engineering, 2008. 134(8): p. 1310-1321.
14. Vipulanandan, C. and Paul, E., Performance of epoxy and polyester polymer concrete. ACI Materials Journal,1990. 87(3): p. 241-251.
15. Barros, J.A.O. and Figueiras, J.A., Flexural behaviour of steel fibre reinforced concrete: testing andmodelling. ASCE Materials in Civil Engineering Journal 1999. 11(4): p. 331-339.
16. Fujita, Y., Ishimaru, R., Hanai, S., and Suenaga, Y., Study on internal friction angle and tensile strength ofplain concrete, in Third International Conference on Fracture Mechanics of Concrete and Concrete Structures(FRAMCOS-3). 1998, AEDIFICATIO Publishers: Gifu, Japan. p. 325-340.
17. EN 206-1, Concrete - Part 1: Specification, performance, production and conformity. . 2000: p. 69.
18. Salehian, H., Evaluation of the Performance of Steel Fibre Reinforced Self-Compacting Concrete in ElevatedSlab Systems; from the Material to the Structure, in Civil Engineering 2015, University of Minho. p. 308.
19. ASTM A370, Standard Test Methods and Definitions for Mechanical Testing of Steel Products. 2014.
20. Vandewalle, L., Cracking behaviour of concrete beams reinforced with a combination of ordinaryreinforcement and steel fibers. Materials and Structures, 2000. 33(3): p. 164-170.
21. Tan, K.-H., Paramasivam, P., and Tan, K.-C., Cracking characteristics of reinforced steel fiber concretebeams under short- and long-term loadings. Advanced Cement Based Materials, 1995. 2(4): p. 127-137.
22. Moraes Neto, B.N., Barros, J.A.O., and Melo, G.S.S.A., A model for the prediction of the punching resistanceof steel fibre reinforced concrete slabs centrically loaded. Construction and Building Materials, 2013. 46(0):p. 211-223.
23. Harajli, M., Hamad, B., and Karam, K., Bond-slip Response of Reinforcing Bars Embedded in Plain andFiber Concrete. Journal of Materials in Civil Engineering, 2002. 14(6): p. 503-511.