Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Evaluation of Horizontal Shear Strength for Concrete Composite Members

콘크리트 합성부재의 수평 전단강도 평가

  • Suh, Jung-Il (Dept. of Architecture & Architectural Engineering, Seoul National University) ;
  • Park, Hong-Gun (Dept. of Architecture & Architectural Engineering, Seoul National University) ;
  • Hong, Geon-Ho (Dept. of Architectural Engineering, Hoseo University) ;
  • Kang, Su-Min (Dept. of Architectural Engineering, Chungbuk National University) ;
  • Kim, Chul-Goo (Dept. of Architecture & Architectural Engineering, Seoul National University)
  • Received : 2015.10.21
  • Accepted : 2016.05.30
  • Published : 2016.08.31
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Abstract

In this study, concrete composite beams were tested under two-point loading to evaluate horizontal shear strength. The test variables were a type of composite members (PC+RC, PSC+RC, SFRC+RC), area ratio of high-strength (60MPa) to low-strength concrete (24 MPa), and transverse reinforcement ratio. The test results showed that the contribution of transverse reinforcements and interface conditions had influence on horizontal shear strength. Existing and previous test results were classified according to test methods and the interface conditions and were compared with the predictions of current design codes. On the basis of test results, an improved design method was proposed.

본 연구에서는 콘크리트 합성부재의 합리적인 수평전단강도 평가를 위하여 합성보 전단 실험을 수행하였다. 실험 변수로는 PC부재의 유형(PC+RC, PSC+RC, SFRC+RC), 고강도 콘크리트 대비 저강도 콘크리트의 면적비, 전단철근비를 고려하였다. 실험 결과, 수평 균열 발생 시 부재 내력이 감소하였으며 전단철근의 기여도와 계면 상태가 수평전단강도에 영향을 주는 것으로 나타났다. 기존 실험 결과를 실험 방법 및 계면 상태로 분류하여 현행구조기준과 비교하였으며 분석결과를 바탕으로 개선된 설계방안을 제안하였다.

Keywords

References

  1. Hofbeck, J. A., Ibrahim, I. O., and Mattock, A. H., "Shear Transfer in Reinforced Concrete," ACI Journal Proceedings, Vol.66, No.2, 1969, pp.119-128.
  2. Mattock, A. H., and Hawkins, N. M., "Shear Transfer in Reinforced Concrete-Recent Research," Journal of the Prestressed Concrete Institute, Vol.17, No.2, 1972, pp.55-75.
  3. Mattock, A. H., Johal, L., and Chwo, H. C., "Shear Transfer in Reinforced Concrete with Moment or Tension Acting across the Shear Plane," Journal of the Prestresed Concrete Institute, Vol.20, No.4, 1975, pp.76-93.
  4. Mattock, A. H., "Shear Transfer under Monotonic Loading across an Interface between Concretes Cast at Different Times," University of Washington Report SM 76-3, 1976, 66 pp.
  5. Mattock, A. H., Li, W. K., and Wang T. C., "Shear Transfer in Light-Weight Reinforced Concrete," Journal of the Prestressed Concrete Institute, Vol.21., No.1, 1976, pp.20-39.
  6. Walraven, J. C., Frenay, J., and Pruijssers, A., "Influence of Concrete Strength and Load History on the Shear Friction Capacity of Concrete Members," Journal of the Prestressed Concrete Institute, Vol.32, No.1, 1987, pp.66-84.
  7. Walraven, J. C., and Stroband, J., "Shear Friction in High-Strength Concrete, High-Performance Concrete," High-Performance Concrete, SP-149, V. M. Malhotra, ed., American Concrete Institute, Farmington Hills, MI, 1994, pp.311-33.
  8. Khan, L. F., and Mitchell, A. D., "Shear Friction Test with High-Strength Concrete," ACI Structural Journal, Vol.99, No.1, 2002, pp.98-103.
  9. Revez. S., "Behavior of Compressive T-Beams with Prestressed and Unprestressed Reinforcement," ACI Journal Proceedings, Vol.49, No.2, 1953, pp.585-592.
  10. Saemann, J. C., and Washa, G. W., "Horizontal Shear Connections between Precast Beams and Cast-In-Place Slabs," ACI Structural Journal, Vol.61, No.11, 1964, pp.1383-1409.
  11. Bryson, J. O., Skoda. L. F., and Watstein. D., "Flexural Behavior of Prestressed Split-Beam Composite Concrete Sections," PCI Journal Proceeding, Vol.10, No.3, 1965, pp.77-91. https://doi.org/10.15554/pcij.06011965.77.91
  12. Kim, C. G., Park, H. G., Hong, G. H., and Kang, S. M., "Shear Strength of Hybrid Beams Combining Precast Concrete and Cast-In-Place Concrete," Journal of the Korea Concrete Institute, Vol.25, No.2, 2013, pp.175-185. https://doi.org/10.4334/JKCI.2013.25.2.175
  13. Kim, C. G., Park, H. G., Hong, G. H., and Kang, S. M., "Shear Strength of PC-CIP Composite Beams with Shear Reinforcement," Journal of the Korea Concrete Institute, Vol.26, No.2, 2014, pp.189-199. https://doi.org/10.4334/JKCI.2014.26.2.189
  14. Kim, C. G., Park, H. G., Hong, G. H., and Kang, S. M., and Suh, J. I., "Shear Strength of Prestressed PC-CIP Composite Beams without Vertical Shear Reinforcement," Journal of the Korea Concrete Institute, Vol.26, No.4, 2014, pp.533-543. https://doi.org/10.4334/JKCI.2014.26.4.533
  15. Suh, J. I., Park, H. G., Hong, G. H., and Kang, S. M., and Kim, C. G., "Shear Strength of Prestressed PC-CIP Composite Beams with Vertical Shear Reinforcement," Journal of the Korea Concrete Institute, Vol.27, No.4, 2015, pp.399-409. https://doi.org/10.4334/JKCI.2015.27.4.399
  16. Korea Concrete Institute, "Concrete Design Code and Commentray," Kimoondang Publishing Company, Seoul, Korea, 2012.
  17. ACI Committe 318, "building Code Requirements for Structural Concrete(ACI 318-11) and Commentary," American Concrete Institute, Farmington Hills, MI, 2011.
  18. Eurocode2, "Design of Concrete Structures-Part1-1: General Rules and Rules for Buildings," Brussels, Belgium, 2004.
  19. AASHTO-LRFD, "Bridge Design Specification," American Association of State Highway and Transportation Officials, Washington, D.C., 2012.
  20. CSA, "Design of Concrete Structures," Canadian Standard Association, Rexdale, Ontario, Canada, 2004.
  21. Loov, R. E., and Patnaik, A. K., "Horizontal Shear Strength of Composite Concrete Beams with a Rough Interface," PCI Journal, Jan-Feb 1994, pp.48-69.
  22. Khan, L. F., and Slapkus, A., "Interface Shear in High Strength Composite T-Beams," PCI Journal, July-Aug 2004, pp.102-110.
  23. Nagle, T.J., and Kuchma, D. A., "Shear Transfer Resistance in High Strength Concrete Girders," Magazine of Concrete Research, Vol.59, No.8, 2007, pp.611-620. https://doi.org/10.1680/macr.2007.59.8.611
  24. Patnaik, A. K., "Behavior of Composite Concrete Beams with Smooth Interface," Journal of Structural Engineering, Vol.127, No.4, 2001, 359-366 https://doi.org/10.1061/(ASCE)0733-9445(2001)127:4(359)
  25. Banta, T. E., "Horizontal Shear Transfer between Ultra High Performance Concrete and Lightweight Concrete," Virginal Polytechnic Institute and State University, 2005, pp.1-130.
  26. Choi, D., "An Experimental Investigation of Interface Bond Strength of Concrete Using Large Powder-Driven Nails," Department of Civil Engineering. Austin, TX, The University of Texas at Austin, Doctor of Philosophy, 1996, pp.1-340.
  27. Kamel, M. R., "Innovative Precast Composite Bridge Systems," Civil Engineering, Lincoln, Nebraska, University of Nebraska, Doctor of Philosophy, 1996, pp.1-246.