Structural Engineering and Mechanics

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Development of a retrofit anchor system for remodeling of building exteriors

  • Yeun, Kyu Won (Institute of Construction Technology, Seon Engineering) ;
  • Hong, Ki Nam (School of Civil Engineering, Chungbuk National University) ;
  • Kim, Jong (Institute of Construction Technology, Seon Engineering)
  • Received : 2012.04.09
  • Accepted : 2012.11.30
  • Published : 2012.12.25
⟨ Previous Next ⟩

Abstract

To enable remodeling of the exterior of buildings more convenient, such finishing materials as curtain walls, metal panels, concrete panels or dry stones need to be easily detached. In this respect, this study proposed a new design of the slab for the purposes. In the new design, the sides of the slab were properly modified, and the capabilities of anchors fixed in the modified slab were experimentally tested. In details, a number of concrete specimens with different sizes and compressive strengths were prepared, and the effect of anchors with different diameters and embedment depths applied in the concrete specimens were tested. The test results of the maximum capacities of the anchors were compared with the number of current design codes and the stress distribution was identified. This study found that the embedment depth specified in the current design code (ACI318-08) should be revised to be more than 1.5 times the edge distance. However, with the steel sheet reinforcement, the experiment acquired higher tensile strength than the design code proposed. In addition, for two types of specimens in the tensile strength experiment, the current design code (ACI 318-08) is overestimated for the anchor depth of 75 mm. This study demonstrated that the ideal breakout failure was attainable for the side slot details of a slab with more than 180 mm of a slab thickness and less than 75 mm of an anchor embedment depth. It is expected that these details of the modified slab can be specified in the upgraded construction design codes.

Keywords

References

  1. American Concrete Institute (2008), "Building code requirements for structural concrete (ACI 318-08) and commentary", ACI Committee 318, American Concrete Institute, 409-438.
  2. American Concrete Institute (1997), "Code requirements for nuclear safety related concrete structures (ACI 349- 97)", ACI Committee 349, American Concrete Institute, 123.
  3. Cook, R.A., Collins, D.M., Klingner, R.E. and Polyzois, D. (1992), "Load-deflection behavior of cast-in-place and retrofit concrete anchors", ACI Struct. J., 89, 639-649.
  4. Delhomme, F. and Debicki, G. (2010), "Numerical modeling of anchor bolts under pullout and relaxation tests", Constr. Buil. Mater., 24, 1232-1238. https://doi.org/10.1016/j.conbuildmat.2009.12.015
  5. Delhomme, F., Debicki, G. and Chaib, Z. (2010), "Experimental behaviour of anchor bolts under pullout and laxation tests", Constr. Buil. Mater., 24, 266-274. https://doi.org/10.1016/j.conbuildmat.2009.08.038
  6. Fuchs, W., Eligehausen, R. and Breen, J.E. (1995), "Concrete capacity design (CCD) approach for fastening to concrete", ACI Struct. J., 92, 73-94.
  7. Kang, T.K., Ha, S.S. and Choi, D.U. (2010), "Bar pullout tests and seismic tests of small-headed bars in beamcolumn joints", ACI Struct. J., 107, 32-42.
  8. Klingner, R.E. and Mendonca, J.A. (1982), "Tensile capacity of short anchor bolts and welded studs: A literature review", ACI Struct. J., 79F, 270-279.
  9. Lee, N.H., Kim, K.S., Bang, C.J. and Park, K.R. (2007), "Tensile-headed with large diameter and deep embedment in concrete", ACI Struct. J., 104, 479-486.
  10. Hoehler, M.S. and Eligehausen, R. (2008), "Behavior and testing of anchors in simulated seismic cracks", ACI Struct. J., 105, 348-357.
  11. Matthew S. Hoehler and Rolf Eligehausen (2008), "Behavior and testing of anchors in simulated seismic cracks", ACI Struct. J., 105, 348-357.
  12. McMackin, P.J., Slutter, R.G. and Fisher, J.W. (1973), "Headed steel anchors under combined loading", AISC Eng. J., Second Quarter, 43-52.
  13. Ozbolt, J., Eligehausen, R., Periskic, G. and Mayer, U. (2007), "3D FE analysis of anchor bolts with large embedment depths", Constr. Buil. Mater., 74, 168-178.
  14. Peter, J.C., Kurt, W.K. and Jai, B.K. (1996), "Tension test of heavy-duty anchors with embedments of 8 to 19 inches", ACI Struct. J., 93, 360-368.
  15. Primavera, E.J., Pinelli, J.P. and Kalajian, E.H. (1997), "Tensile behavior of cast-in-place and undercut anchors in high-strength concrete", ACI Struct. J., 94, 583-594.
  16. Stone, W.C. and Carion, N.J. (1983), "Deformation and failure in large-scale pullout tests", ACI Struct. J., 80, 501-512.
  17. Yang, K.H. and Ashour, A.F. (2008), "Mechanism analysis for concrete breakout capacity of single anchors in tension", ACI Struct. J., 105, 609-616.
  18. Yener, M. (1994), "Overview and progressive finite element analysis of pullout tests", ACI Struct. J., 91, 49-58.
  19. Yoon, Y.S., Kim, H.S. and Kim, S.Y. (2001), "Assessment of fracture behaviors for CIP anchors fastened to cracked and uncracked concretes", KCI Concrete J., 13, 33-41.

Cited by

  1. Ultimate tensile strength of embedded I-sections: a comparison of experimental and numerical results vol.6, pp.4, 2014, https://doi.org/10.1007/s40091-014-0077-y