Modified Monti-Nuti Model for Different Types of Reinforcing Bars Including Inelastic Buckling

Abstract:

The material model for reinforcing bar takes a very important role in the seismic analysis of reinforced concrete structures. The seismic performance of the structural elements such as column will be overestimated if the inelastic buckling is not incorporated in the material model. The Monti-Nuti Model could consider the buckling effect properly. The critical slenderness and anisotropy were discussed which has an important effect on the seismic behaviors of the reinforcement. Then this paper proposed a modified Monti-Nuti Model for different types of reinforcing bars, such as carbon steel reinforcement and stainless steel reinforcement including inelastic buckling. Subsequently, the implementation of the modified Mont-Nuti Model in OpenSees was introduced. Through validating with the experimental curves, the numerical curves generated by the modified model verified its capability.

• Periodical: Applied Mechanics and Materials (Volume 847)
• Pages: 166-172
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.847.166
• Online since: July 2016
• Authors: Zhi Hao Zhou*, Camillo Nuti, Davide Lavorato
• Keywords: Anisotropy, Critical Slenderness, Inelastic Buckling, Material Model, Modified Monti-Nuti Model, OpenSEES

References

[1] W. Ramberg, W.R. Osgood, Description of stress-strain curves by three parameters, Technical No. 902, National Advisory Committee for Aeronautics, Washington, (1943).

[2] M. Menegotto, P. E. Pinto, Method of Analysis for Cyclically Loaded RC Plane Frames Including Changes in Geometry and Non-Elastic Behavior of Elements Under Combined Normal Force and Bending, Proc. of IABSE Symposium on Resistance and Ultimate Deformability of Structures Acted on by Well Defined Repeated Loads, (1973).

[3] F.C. Filippou, E.P. Popov, and V.V. Bertero, Effects of Bond Deterioration on Hysteretic Behavior of Reinforced Concrete Joints, Report No. UCB/EERC-83/19, Earthquake Engineering Research Center, (1983).

[4] G. Monti, C. Nuti, Nonlinear Cyclic Behavior of Reinforcing Bars Including Buckling, Journal of Structural Engineering, 118 (1992), 3268-3284.

DOI: 10.1061/(asce)0733-9445(1992)118:12(3268)

[5] A. Gomes, J. Appleton, Nonlinear Cyclic Stress-Strain Relationship of Reinforcing Bars Including Buckling, Engineering Structures, 19 (1997), 822-826.

DOI: 10.1016/s0141-0296(97)00166-1

[6] R.P. Dhakal, K. Maekawa, Modeling for Postyield Buckling of Reinforcement, Journal of Structural Engineering, 128 (2002), 1139-1147.

DOI: 10.1061/(asce)0733-9445(2002)128:9(1139)

[7] S. Kunnath, Y. Heo, and J. Mohle, Nonlinear Uniaxial Material Model for Reinforcing Steel Bars, Journal of Structural Engineering, 135 (2009), 335-343.

DOI: 10.1061/(asce)0733-9445(2009)135:4(335)

[8] Z. Zong, Uniaxial Material Model Incorporating Buckling for Reinforcing Bars in Concrete Structures Subjected to Seismic Loads, University of California, Davis, (2010).

[9] S. Mau, M. El‐Mabsout, Inelastic Buckling of Reinforcing Bars, Journal of Engineering Mechanics, 115 (1989), 1-17.

DOI: 10.1061/(asce)0733-9399(1989)115:1(1)

[10] T. Albanesi, D. Lavorato, and C. Nuti, Prove Sperimentali Monotone e Cicliche Su Barre Di Acciaio Inox [Experimental and cyclic test on stainless steel rebars], Sperimentazione su materiali e strutture, Convegno nazionale, 2006, 357-366.