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http://dx.doi.org/10.12989/cac.2016.18.3.337

Study on fracture characteristics of reinforced concrete wedge splitting tests  

HU, Shaowei (Materials & Structural Engineering Department, Nanjing Hydraulic Research Institute)
XU, Aiqing (College of Mechanics and Materials, Hohai University)
HU, Xin (Materials & Structural Engineering Department, Nanjing Hydraulic Research Institute)
YIN, Yangyang (College of Mechanics and Materials, Hohai University)
Publication Information
Computers and Concrete / v.18, no.3, 2016 , pp. 337-354 More about this Journal
Abstract
To study the influence on fracture properties of reinforced concrete wedge splitting test specimens by the addition of reinforcement, and the restriction of steel bars on crack propagation, 7 groups reinforced concrete specimens of different reinforcement position and 1 group plain concrete specimens with the same size factors were designed and constructed for the tests. Based on the double-K fracture criterion and tests, fracture toughness calculation model which was suitable for reinforced concrete wedge splitting tensile specimens has been obtained. The results show that: the value of initial craking load Pini and unstable fracture load Pun decreases gradually with the distance of reinforcement away from specimens's top. Compared with plain concrete specimens, addition of steel bar can reduce the value of initial fracture toughness KIini, but significantly increase the value of the critical effective crack length ac and unstable fracture toughness KIun. For tensional concrete member, the effect of anti-cracking by reinforcement was mainly acted after cracking, the best function of preventing fracture initiation was when the steel bar was placed in the middle of the crack, and when the reinforcement was across the crack and located away from crack tip, it plays the best role in inhibiting the extension of crack.
Keywords
reinforced concrete; reinforcement position; fracture parameters; crack propagation;
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1 Bencardino, F., Rizzuti, L., Spadea, G. et al. (2010), "Experimental evaluation of fiber reinforced concrete fracture properties", Compos. Part B Eng., 41(1), 17-24.   DOI
2 Carmona, J.R., Porras, R., Yu, R.C. et al. (2013), "A fracture mechanics model to describe the buckling behavior of lightly reinforced concrete columns", Eng. Struct., 49(2), 588-599.   DOI
3 DL/T5332-2005 (2005), Norm for fracture test of hydraulic concrete, China Electric Power Press, Beijing, China.
4 Englekirk, R.E. (2010), "Effective stiffness of reinforced concrete columns", ACI Struct. J., 107(3), 372-381.
5 Fan, X.Q. and Hu, S.W. (2013), "Influence of crack initiation length on fracture behaviors of reinforced concrete", Appl. Clay Sci., 79, 25-29.   DOI
6 Hu, S.W. and Xu, A.Q. (2015), "Effect analysis on fracture morphology of non-standard concrete wedge splitting tests by different height to width ratio", J. Chin. Ceramic Soc., 43(10), 1492-1499.
7 Hu, S.W., Mi, Z.X. and Lu, J. (2012), "Effect of crack-depth ratio on double-k fracture parameter of reinforced concrete", Appl. Mech. Mater., 226, 937-941, Trans Tech Publications.
8 Kang, S.T., Lee, Y., Park, Y.D. and Kim, J.K. (2010), "Tensile fracture properties of an Ultra High Performance Fiber Reinforced Concrete (UHPFRC) with steel fiber", Compos. Struct., 92(1), 61-71.   DOI
9 Lu, W.Y., Lin, I.J. and Yu, H.W. (2013), "Shear strength of reinforced concrete deep beams", ACI Struct. J., 110(4), 671-680.
10 Maji, A., Orozco, A. and Acree, R. (2001), "Fracture analysis of FRP reinforced concrete beams", J. Eng. Mech., 127(6), 620-624.   DOI
11 Sagaseta, J. and Vollum, R.L. (2011), "Influence of aggregate fracture on shear transfer through cracks in reinforced concrete", Mag. Concrete Res., 63, 119-137.   DOI
12 Sener, S., Barr, B.I.G. and Abusiaf, H.F. (2004), "Size effect in axially loaded reinforced concrete columns", J. Struct. Eng., 130(4), 662-670.   DOI
13 Sih, G.C. (1973), "Handbook of stress-intensity factors, institute of fracture and solid mechanics, Lehigh University, methods of analysis and solutions of crack problems, Springer Science & Business Media.
14 Srawley, J.E. and Gross, B.(1972), "Stress intensity factors for bend and compact specimens", Eng. Fract. Mech., 4(3), 587-589.   DOI
15 Tada, H., Paris, P.C. and Irwin, G.R. (2000), The analysis of cracks handbook, ASME Press, New York, NY, USA.
16 Vecchio, F.J. (2000), "Disturbed stress field model for reinforced concrete: formulation", J. Struct. Eng., 126(9), 1070-1077.   DOI
17 Zhang, X.X., Elazim, A.M.A., Ruiz, G. et al. (2014), "Fracture behaviour of steel fibre-reinforced concrete at a wide range of loading rates", Int. J. Impact Eng., 71(6), 89-96.   DOI
18 Xu, S.L. and Reinhardt, H.W.(1999), "Determination of double- K criterion for crack propagation in quasibrittle fracture, Part III: Compact tension specimens and wedge splitting specimens", Int. J. Fract., 98(2), 179-193.   DOI