Back
 ENG  Vol.8 No.7 , July 2016
Shear Behavior in Indented Concrete Layers with Different Strengths
Abstract: This paper investigates the design formula for the shear strength at the concrete-to-concrete interface proposed in Eurocode with regard to concrete layers with different strengths. Based upon the results of the study on the applicability of the design formula, push-off test is conducted on specimens with various indented interfaces to evaluate the actual behavior with respect to the surface roughness. The experimental results reveal that the interfacial shear strength increases with higher compressive strength of the concrete layers presenting different strengths and that the shear strength at the indented interface differs by 20% to 50% compared to the value predicted by the design formula. Especially, the shear strength developed between the concrete layers with different strengths appears to be different from the prediction of the design formula as much as the layers present larger difference in their compressive strengths.
Cite this paper: Kang, J. , Park, J. , Jung, W. and Keum, M. (2016) Shear Behavior in Indented Concrete Layers with Different Strengths. Engineering, 8, 423-431. doi: 10.4236/eng.2016.87039.
References

[1]   Hanson, N.W. (1960) Precast-Prestressed Concrete Bridges 2. Horizontal Shear Connections. Journal of the PCA Research and Development Laboratories, No. 2, 38-58.

[2]   Birkeland, H.W. and Birkeland, P.W. (1966) Connections in Precast Concrete Construction. Journal of the ACI, Proceedings, 63, 345-368.

[3]   Mattock, A.H. and Hawkins, N.M. (1972) Shear Transfer in Reinforced Concrete—Recent Research. Precast/Prestressed Concrete Institute, PCI Journal, 17, 55-75.

[4]   Walraven, J.C. and Reinhardt, H.W. (1981) Theory and Experiments on the Mechanical Behaviour of Cracks in Plain and Reinforced Concrete Subjected to Shear Loading. Heron, 26, No. 1A.

[5]   Loov, R.E. and Patnaik, A.K. (1994) Horizontal Shear Strength of Composite Concrete Beams with Rough Interface. PCI Journal, 39, 48-69.
http://dx.doi.org/10.15554/pcij.01011994.48.69

[6]   Júlio, E., Branco, F. and Silva, V. (2004) Concrete-to-Concrete Bond Strength. Influence of the Roughness of the Substrate Surface. Construction and Building Materials, 18, 675-681.
http://dx.doi.org/10.1016/j.conbuildmat.2004.04.023

[7]   Júlio, E. and Santos, P. (2010) Comparison of Methods for Texture Assessment of Concrete Surfaces. ACI Materials Journal, 107, 433-440.

[8]   EN 1992-1-1 Eurocode 2: Design of Concrete Structures—Part I: General Rules and Rules for Buildings. European Committee for Standardization, 2002.

[9]   Kang, J.Y., Park, J.S., Jung, W.T. and Keum, M.S. (2015) Connection between Concrete Layers with Different Strengths. Engineering, No. 7, 365-372.

 
 
Top