Experimental study on shear behavior of the interface between new and old concrete with reinforced

Structural Engineering

Abstract

In order to investigate the shear behavior of the new and old concrete interface, three kinds of reinforced concrete models with new-old concrete anchorage reinforcement were designed and fabricated. The semi-cyclic loading test was carried out. The failure mode, shear bearing capacity, interfacial shear slip and stress distribution of steel bars were analyzed. The test results show that the failure mode of the old and new concrete reinforcement at the interface was split type shear failure. The shear bearing capacity of reinforced concrete is mainly related to the shear resistance of concrete and the dowel pin shear, and the maximum value is about 1.186 × 104 kN/m2. The shear bearing capacity of stirrups reinforced concrete is increased by 28.5%. According to the obvious interface slip, the working state of the interface between rebar bolt and concrete can be divided into the stage of interface bonding and the stage of the friction. The lower part of the tendons is mainly cut and its upper part is shear-based. The largest stress is obtained at the interface and it decreases gradually to both ends. By analyzing the test results and relevant research, the formulas for calculating the shear capacity of the new and old concrete interface are derived. The results show that the formula of shear capacity is correct and feasible.

Keywords

New-old concrete concrete surface low-cyclic loading test shear capacity anchorage 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Birkeland, P. W. and Birkeland, H. W. (1966). “Connections in precast concrete construction.” ACI Journal Proceedings, Vol. 63, No. 3, pp. 345–368.Google Scholar
  2. Eduardo, C. and José, C. (2017). “Experimental research on the behavior of concrete-to-concrete interfaces subjected to a combination of shear and bending moment.” Engineering Structures, Vol. 132, pp. 278–287, DOI: 10.1016/j.engstruct.2016.11.041.CrossRefGoogle Scholar
  3. Fiebfich, M. H. (1994). “Scientific aspects of adhesion phenomena in the interface mineral substrate polymers.” Adherence of Young on Old Concrete, Edited by Wittrnann, F. H.Google Scholar
  4. Gao, J. H., Zhang, S. Z., Ke, Z. T., Deng, A. X., and Sun, N. (2004). “Model tests of beam-column joints for large-axial-load-pile underpinning.” China Civil Engineering Journal, Vol. 9, pp. 62–68, DOI: 1000-131X(2004)09-0062-07. (in Chinese)Google Scholar
  5. Gao, J. P. and Pan, J. L. (2000). “Become the old and new concrete interface stress weak link in reason.” Concrete, Vol. 6, pp. 44–46. (in Chinese)Google Scholar
  6. Huang, X. X., Zhu, Y. J., and Huang, S. H. (2004). “Design method and application of pile beam underpinning structure.” Journal of South China University of Technology (Natural Science Edition), Vol. 32, No. 1, pp. 85–89, DOI: 1000-565X(2004)01-0085-05. (in Chinese)Google Scholar
  7. Jiang, Z. W. (2014). The experimental study on shear performance of the interfacial between new and existing concrete with groves and transversal remforcement, Master’s Thesis, Guangdong University of Technology, Shenzhen. (in Chinese)Google Scholar
  8. Mao, D. J. and Qian, Y. J. (2016). “Calculation methods of shear strength on new-to-old concrete interface.” Building Structure, Vol. 46, No. 15, pp. 65–69, DOI: 1002-848X(2016)15-0065-04. (in Chinese)Google Scholar
  9. Nie, J. G., Wang, Y. H., Fan, J. S., and Zhang, X. G. (2012). “Mechanical behavior of the interface of composite cross beam in old concrete bridges widened with steel-concrete composite beam.” China Civil Engineering Journal, Vol. 45, No. 3, pp. 99–109, DOI: 1000-131X (2012)03-0099-11. (in Chinese)Google Scholar
  10. Rahal, K. N., Khaleefi, A. L., and Sanee, A. (2016). “An experimental investigation of shear-transfer strength of normal and high strength self-compacting concrete.” Engineering Structural, Vol. 109, pp. 16–25, DOI: 10.1016/j.engstruct.2015.11.015.CrossRefGoogle Scholar
  11. Santos, P. M. D. and Júlio, B. S. (2010). “Recommend improvements to current shear-friction provisions of model code.” 3rd Fib International Congress, Washington, DC.Google Scholar
  12. Santos, P. M. D. and Júlio, B. S. (2011). “Factors affecting bond between new and old concrete.” ACI Material Journal, Vol. 108, No. 4, pp. 449–456.Google Scholar
  13. Wang, E. H. (2006). Experimental research on the shearing property of interfacial bonding of new to old concrete by planting reinforced bar, Master’s Thesis, Zhengzhou University, Zhengzhou. (in Chinese)Google Scholar
  14. Wang, Z. L., Lin, Y. J., and Qian, Y. J. (2005). “Experimental research on shear properties of new-to-old concrete interface.” Journal of Southwest Jiao Tong University, Vol. 40, No. 5, pp. 600–604, DOI: 0258-2724(2005)05-0600-05. (in Chinese)Google Scholar
  15. Yang, B. J. and Zhang, H. Z. (2000). “Hilti reinforcement technique in design modification application.” Architecture Technology, Vol. 31, No. 11, pp. 766–767. (in Chinese)Google Scholar
  16. Ye, G. (2011). Study on the anti-shear behavior of bond-interface between new and old concrete, Master’s Thesis, Chongqing University, Chongqing, CHN. (in Chinese)Google Scholar
  17. Zavliaris, K. D., Kollias, S., and Speare, P. R. S. (1996). “An experimental study of adhesively bonded anchorages in concrete.” Magazine of Concrete Research, Vol. 48, No. 175, pp. 79–93.CrossRefGoogle Scholar
  18. Zhang, J. R., Huang, H. J., Xiao, W., Wu, J., and Song, L. (2008). “Study on mechanical behavior of multi medium between the bonding mechanism and the anchorage.” Building and Structure, Vol. 38, No. 7, pp. 39–42. (in Chinese)Google Scholar
  19. Zhang, L., Li, Q. N., Li L., and Wang, X. W. (2015). “Experimental study on shear bearing capacity of bond-interface between new and old concrete in under piing engineering of high-loaded pile foundation.” Journal of Civil, Architectural & Environmental Engineering, Vol. 37, No. S1, pp. 154–158, DOI: 10.11835/j.issn.1674-4764.2015.s1.029. (in Chinese)Google Scholar
  20. Zhu, B. X. (2003). “Experimental study on inorganic interfacial binder.” New Building Materials, Vol. 12, pp. 13–15, DOI: 1001702X (2003) 12-0013-03. (in Chinese)Google Scholar

Copyright information

© Korean Society of Civil Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  1. 1.School of Architecture and Civil EngineeringYan’an UniversityYan’anChina
  2. 2.School of Public AdministrationYan’an UniversityYan’anChina

Personalised recommendations