Title:
Meso-Scale Concrete Model for Failure Simulation in Glass FRP Reinforced Concrete Structures
Author(s):
Sina Khodaie and Fabio Matta
Publication:
Symposium Paper
Volume:
327
Issue:
Appears on pages(s):
37.1-37.12
Keywords:
concrete, fracture, GFRP, LDPM, shear, size effect.
DOI:
10.14359/51713358
Date:
11/1/2018
Abstract:
This paper demonstrates a meso-scale numerical model to simulate the mechanical response of glass fiber-reinforced polymer (GFRP) reinforced concrete (RC) structures in two instances where fracture and friction phenomena play an important role, namely: (1) four-point bending load testing of scaled slender RC beams without stirrups; and (2) static push-over load testing of a RC railing post-deck connection. The Lattice Discrete Particle Model (LDPM), a meso-scale concrete model that accounts for concrete heterogeneity, and fracture and friction behavior, is considered. The RC structural models include GFRP bar elements whose interface with the surrounding concrete is described by a nonlinear bond-slip model. For GFRP-RC beams, the results of numerical simulations provide accurate estimates of load-midspan displacement response, failure load and crack pattern irrespective of beam depth up to 292 mm. This outcome highlights the promise held by this modeling approach to enable research to advance the understanding of shear force transfer mechanisms and related size effect. For the case of a representative GFRP-RC post-deck connection, the numerical simulations yielded accurate results on strength and failure mode. This outcome highlights the potential of LDPM-based numerical modeling for screening candidate designs prior to expensive crash testing.
Related References:
1. Cusatis, G., Pelessone, D., and Mencarelli, A. “Lattice Discrete Particle Model (LDPM) for Failure Behavior of Concrete. I: Theory,” Cement and Concrete Composites, V. 33, No. 9, 2011, pp. 881-890.
2. Alnaggar, M. “Multiscale Modeling of Aging and Deterioration of Reinforced Concrete Structures,” PhD Dissertation, Northwestern University, Evanston, IL, 2014.
3. Domonell, E.M. “Lattice Discrete Particle Modeling of Reinforced Concrete,” MS Thesis, Rensselaer Polytechnic Institute, Troy, NY, 2011.
4. Matta, F., Mazzoleni, P., Zappa, E., et al. “Shear Strength of FRP Reinforced Concrete Beams Without Stirrups : Verification of Fracture Mechanics Formulation,” ACI Special Publication, V. 286, 2012, pp. 1-14.
5. ACI Committee 440. “Guide for the Design and Construction of Structural Concrete Reinforced with FRP Bars -American Concrete Institute (ACI 440.1R-15),” Farmington Hills, MI, 2015.
6. CAN/CSA S6-14. “Canadian Highway Bridge Design Code,” Mississauga, ON, Canada, 2014.
7. Bažant, Z.P., Yu, Q., Gerstle, W., Hanson, J., and Ju, J.W. “Justification of ACI 446 Code Provisions for Shear Design of Reinforced Concrete Beams,” ACI Structural Journal, V. 104, No. 5, 2007, pp. 601-610.
8. Matta, F., El-Sayed, A.K., Nanni, A., and Benmokrane, B. “Size Effect on Concrete Shear Strength in Beams Reinforced with Fiber-Reinforced Polymer Bars,” ACI Structural Journal, V. 110, No. 4, 2013, pp. 617-628.
9. American Association of State Highway and Transportation Officials (AASHTO). “AASHTO LRFD Bridge Design Guide Specifications for GFRP- Reinforced Concrete Bridge Decks and Traffic Railings,” First Edition, AASHTO, Washington, D.C., 2009.
10. Matta, F., and Nanni, A. “Connection of Concrete Railing Post and Bridge Deck with Internal FRP Reinforcement,” Journal of Bridge Engineering, V. 14, No. 1, 2009, pp. 66-76.
11. Cusatis, G., Mencarelli, A., Pelessone, D., and Baylot, J. “Lattice Discrete Particle Model (LDPM) for Failure Behavior of Concrete. II: Calibration and Validation,” Cement and Concrete Composites, V. 33, No. 9, 2011, pp. 891-905.
12. RILEM. “Determination of the fracture energy of mortar and concrete by means of three-point bend tests on notched beams,” Materials and Structures, V. 18, No. 106, 1985, pp. 285-290.
13. Bažant, Z.P., and Becq-Giraudon, E. “Statistical Pprediction of Fracture Parameters of Concrete and Implications for Choice of Testing Standard,” Cement and Concrete Research, V. 32, No. 4, 2002, pp. 529-556.
14. Rosselló, C., Elices, M., and Guinea, G.V. “Fracture of Model Concrete: 2. Fracture Energy and Characteristic Length,” Cement and Concrete Research, V. 36, No. 7, 2006, pp. 1345-1353.
15. Khodaie, S., Matta, F., and Alnaggar, M. “Lattice Discrete Particle Modeling of Shear Failure in Scaled GFRP Reinforced Concrete Beams without Stirrups,” Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures (FraMCoS-9), Berkeley, CA, USA, May 29- June 2, 2016.
16. Kaw, A.K. “Mechanics of Composite Materials,” CRC Press, Boca Raton, FL, 2005.
17. Cosenza, E., Manfredi, G., and Realfonzo, R. “Behavior and Modeling of Bond of FRP Rebars to Concrete,” Journal of Composites for Construction, V. 1, No. 2, 1997, pp. 40-51.
18. Lin, X., and Zhang, Y.X. “Evaluation of Bond Stress-slip Models for FRP Reinforcing Bars in Concrete,” Composite Structures, V. 107, No. 1, 2014, pp. 131-141.
19. Focacci, F., Nanni, A., and Bakis, C. “Local Bond-slip Relationship for FRP Reinforcement in Concrete,” Journal of Composites for Construction, V. 4, No. 1, 2000, pp. 24-31.
20. Benmokrane, B., Tighiouart, B., and Chaallal, O. “Bond Strength and Load Distribution of Composite GFRP Reinforcing Bars in Concrete,” ACI Materials Journal, V. 93, No. 3, 1996, pp. 246-253.
21. ES3. “MARS Manual, Version 2016.2.03,” Engineering and Software System Solutions, Inc. 2016.