Experimental Study on Effects of Fatigue Loading History on Bond Behavior between Steel Bars and Concrete

Abstract:

This paper presents an experimental investigation on the influence of fatigue loading history on bond behavior between steel bars and concrete. Reinforced concrete specimens were subjected to fatigue loadings with different amplitudes and cycles before undergoing eccentric pull-out tests. Tests revealed that all specimens failed with the splitting of the concrete cover. With increased loading cycles, the concrete in front of transverse ribs usually becomes denser at the beginning. Meanwhile, the initial bond stiffness and the bond strength increased, while the slip corresponding to the peak bond stress decreases. With the further increase of loading cycles, the bond strength begins to decrease after it reaches a critical value. This study determined that for specimens subjected to repeated loading with a larger amplitude, fewer cycles are needed for the bond strength to go up to the critical bond strength.

• Periodical: Key Engineering Materials (Volume 711)
• Pages: 673-680
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.711.673
• Online since: September 2016
• Authors: Zhiwen Ye, Wei Ping Zhang*, You Hu, Xiang Lin Gu
• Keywords: Bond Behavior, Fatigue Loading History, Splitting Failure

References

[1] L.A. Lutz, P. Gergely, Mechanics of bond and slip of deformed bars in concrete, ACI J. No. 64-62 (1967) 711-721.

[2] fib Bulletin No. 72, Bond and anchorage of embedded reinforcement: Background to the fib Model Code for Concrete structures 2010. (2014).

DOI: 10.35789/fib.bull.0072

[3] G. Rehm, R. Eligehausen, Bond of ribbed bars under high cycle repeated loads, ACI J. No. 76-15 (1979) 297-309.

DOI: 10.14359/6948

[4] G.L. Balazs, Fatigue of bond, ACI Mater. J. 88(6) (1991) 620-629.

[5] H.O. Byung, H.K. Se, Realistic models for local bond stress-slip of reinforced concrete under repeated loading, ASCE J. Struct. Eng. 133(2) (2007) 216-224.

DOI: 10.1061/(asce)0733-9445(2007)133:2(216)

[6] G. Metelli, G.A. Plizzari, Influence of the relative rib area on bond behavior, Mag. Concr. Res. 66(6) (2014) 277-294.

DOI: 10.1680/macr.13.00198

[7] A. Lindorf, M. Curbach, Slip behaviour at cyclic pullout tests under transverse tension, Constr. Build. Mater. 25(8) (2011) 3617–3624.

DOI: 10.1016/j.conbuildmat.2011.03.057

[8] J. Cairns, K. Jones, An evaluation of the bond-splitting action of ribbed bars, ACI Mater. J. 93(1) (1996) 10-19.

[9] J. Cairns, K. Jones, The splitting forces generated by bond, Mag. Concr. Res. 47(171) (1995) 153-165.

[10] P.G. Gambarova, G.P. Rosati, Bond and splitting in reinforced concrete: test results on bar pull-out, Mater. Struct. 29(5) (1996) 267-276.

DOI: 10.1007/bf02486361

[11] P.G. Gambarova, G.P. Rosati, Bond and splitting in bar pull-out: behavioural laws and concrete cover role, Mag. Concr. Res. 49(179) (1997) 99-110.

DOI: 10.1680/macr.1997.49.179.99

[12] G.A. Plizzari, M.A. Deldossi, S. Massimo, Transverse reinforcement effects on anchored deformed bars, Mag. Concr. Res. 50(2) (1998) 161-178.

DOI: 10.1680/macr.1998.50.2.161

[13] CEB-FIP, Model code 1990. Thomas Telford Ltd, Lausanne, Switzeland.