Advertisement

Arabian Journal for Science and Engineering

, Volume 44, Issue 5, pp 4745–4755 | Cite as

Experimental Investigation of the Tensile Capacity for Anchor Groups with Different Spacing Between Cast-in-Place Headed Anchors of High Strength and Deep Embedment

  • Zeng-zhen Qian
  • Xian-long LuEmail author
  • Ming-qiang Sheng
Research Article - Civil Engineering
  • 24 Downloads

Abstract

The overall objective of this study is to investigate the tensile capacity for anchor groups of cast-in-place headed anchors with high strength and deep embedment at different spacing between anchors. Experimental tensile load tests were conducted on 12 reinforced concrete specimens for the anchor groups of cast-in-place headed 42CrMo anchor bolts of 36, 48, and 60 mm in diameter with an identical embedment of 35 times the anchor diameter. The spacing between the anchors of the test specimens varied from 2 to 5 times the outside diameter of the anchor. The applied tensile loadings, the anchor displacements relative to concrete surface, the strains along the embedment length of anchor bolts, the failure loads, and the failure modes were documented comprehensively. The tensile load–displacement curves of the anchor groups approximately followed a three-phase pattern: an initial linear segment, a curvilinear transition, and a final linear sector. The interpreted tensile load-carrying capacities of elastic limit and failure threshold were obtained. The interpreted elastic limit increased as the anchor spacing increased. However, the spacing between anchors had a different effect on the interpreted failure threshold of anchor groups. All the test specimens of anchor groups failed via concrete splitting rather than concrete cone breakout, following a brittle cracking failure pattern.

Keywords

Anchorage Anchor spacing Anchor group Size effect Large-diameter bolt Tension test High-strength bolt Embedment depth Cast-in-place 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Notes

Acknowledgements

The authors wish to acknowledge the support from the Fundamental Research Funds for Central Universities for research project Nos. 53200959614 and 2652017069 and the State Grid Corporation of China for research project No. GCB17201700149.

References

  1. 1.
    Nilforoush, R.: Numerical and experimental evaluations of load-carrying capacity of cast-in-place headed anchors and post-installed adhesive anchors. Ph.D. Dissertation, Luleå University of Technology, Luleå, Sweden, (2017)Google Scholar
  2. 2.
    Cannon, R.W.; Godfrey, D.A.; Moreadith, F.L.: Guide to the design of anchor bolts and other steel embedments. Concr. Int. 3(7), 28–41 (1981)Google Scholar
  3. 3.
    Cannon, R.W.: Straight talk about anchorage to concrete–Part I. ACI Struct. J. 92(6), 581–586 (1995)Google Scholar
  4. 4.
    Cook, R.A.; Collins, D.M.; Klingner, R.E.; Polyzois, D.: Load-deflection behavior of cast-in-place and retrofit concrete anchors. ACI Struct. J. 89(6), 639–649 (1992)Google Scholar
  5. 5.
    Fuchs, W.; Eligehausen, R.; Breen, J.E.: Concrete capacity design (CCD) approach for fastening to concrete. ACI Struct. J. 92(1), 73–94 (1995)Google Scholar
  6. 6.
    Gattesco, N.; Giuriani, E.: Experimental study on stud shear connectors subjected to cyclic loading. J. Constr. Steel Res. 38(1), 1–21 (1996)CrossRefGoogle Scholar
  7. 7.
    Saari, W.K.; Hajjar, J.F.; Schultz, A.E.; Shield, C.K.: Behavior of shear studs in steel frames with reinforced concrete infill walls. J. Constr. Steel Res. 60, 1453–1480 (2004)CrossRefGoogle Scholar
  8. 8.
    Shim, C.S.; Lee, P.G.; Yoon, T.Y.: Static behavior of large stud shear connectors. Eng. Struct. 26, 1853–1860 (2004)CrossRefGoogle Scholar
  9. 9.
    Piccinin, R.; Cattaneo, S.; Biolzi, L.: Breakout capacity of headed anchors in confined concrete: experimental evidence. ACI Struct. J. 110(3), 469–479 (2013)Google Scholar
  10. 10.
    ACI Committee 318 Building code requirements for structural concrete (ACI 318-14) and commentary on building code requirements for structural concrete (ACI 318R-14), American Concrete Institute, Farmington Hills, MI, USA (2014)Google Scholar
  11. 11.
    ACI Committee 349, Code requirements for nuclear safety-related concrete structures (ACI 349-13) and commentary, American Concrete Institute, Farmington Hills, MI, USA (2013)Google Scholar
  12. 12.
    Martin, L.D.; Perry, C.J.: PCI Design Handbook, 6th edn. Precast/Prestressed Concrete Institute, Chicago (2004)Google Scholar
  13. 13.
    Eligehausen, R.; Cook, R.A.; Appl, J.: Behavior and design of adhesive bonded anchors. ACI Struct. J. 103(6), 822–831 (2006)Google Scholar
  14. 14.
    Lee, N.H.; Kim, K.S.; Bang, C.J.; Park, K.R.: Tensile-headed anchors with large diameter and deep embedment in concrete. ACI Struct. J. 104(4), 479–486 (2007)Google Scholar
  15. 15.
    ACI Committee 318 Building code requirements for structural concrete (ACI 318-02) and commentary on building code requirements for structural concrete (ACI 318R-02), American Concrete Institute, Farmington Hills, MI, USA (2002)Google Scholar
  16. 16.
    ACI Committee 318 Building code requirements for structural concrete (ACI 318-08) and commentary on building code requirements for structural concrete (ACI 318R-08), American Concrete Institute, Farmington Hills, MI, USA (2008)Google Scholar
  17. 17.
    Lee, N.H.; Park, K.R.; Suh, Y.P.: Shear behavior of headed anchors with large diameters and deep embedments. ACI Struct. J. 107(2), 146–156 (2010)Google Scholar
  18. 18.
    Delhomme, F.; Roure, T.; Arrietab, B.; Limam, A.: Static and cyclic pullout behavior of cast-in-place headed and bonded anchors with large embedment depths in cracked concrete. Nucl. Eng. Des. 287, 139–150 (2015)CrossRefGoogle Scholar
  19. 19.
    Delhomme, F.; Roure, T.; Arrieta, B.; Limam, A.: Pullout behavior of cast-in-place headed and bonded anchors with different embedment depths. Mater. Struct. 49(5), 1843–1859 (2016)CrossRefGoogle Scholar
  20. 20.
    Eligehausen, R.; Bouška, P.; Červenka, V.; Pukl, R.: Size effect of the concrete cone failure load of anchor bolts. In: Bazant, Z.P. (ed.) 1st International Conference of Fracture Mechanics of Concrete Structures (FRAMCOS 1), pp. 517–525. Taylor & Francis, New York (1992)Google Scholar
  21. 21.
    Mallée, R.; Fuchs, W.; Eligehausen, R.; Bergmeister, K.; Fingerloos, F.; Wörner, J.D.: Design of Fastenings for Use in Concrete: The CEN/TS 1992–4 Provisions. Ernst & Sohn, Hoboken (2013)CrossRefGoogle Scholar
  22. 22.
    Nilforoush, R.; Nilsson, M.; Elfgren, L.; Ožbolt, J.; Hofmann, J.; Eligehausen, R.: Tensile capacity of anchor bolts in concrete: influence of member thickness and anchor’s head size. ACI Struct. J. 114(6), 1517–1528 (2017)Google Scholar
  23. 23.
    Nilforoush, R.; Nilsson, M.; Elfgren, L.; Ožbolt, J.; Hofmann, J.; Eligehausen, R.: Influence of surface reinforcement, member thickness, and cracked concrete on tensile capacity of anchor bolts. ACI Struct. J. 114(6), 1–14 (2017)Google Scholar
  24. 24.
    Ožbolt, J.; Eligehausen, R.; Reinhardt, H.W.: Size effect on the concrete cone pull-out load. Int. J. Fracture 95(1–4), 391–404 (1999)CrossRefGoogle Scholar
  25. 25.
    Pallarés, L.; Hajjar, J.F.: Headed steel stud anchors in composite structures, Part I: shear. J. Constr. Steel Res. 60(2), 198–212 (2010)CrossRefGoogle Scholar
  26. 26.
    Pallarés, L.; Hajjar, J.F.: Headed steel stud anchors in composite structures, Part II: tension and interaction. J. Constr. Steel Res. 60(2), 213–228 (2010)CrossRefGoogle Scholar
  27. 27.
    Orangun, C.O.; Jirsa, J.O.; Breen, J.E.: A reevaluation of test data on development length and splices. ACI J. Proc. 74(3), 114–122 (1977)Google Scholar

Copyright information

© King Fahd University of Petroleum & Minerals 2018

Authors and Affiliations

  1. 1.School of Engineering and TechnologyChina University of GeosciencesBeijingChina
  2. 2.China Electric Power Research InstituteBeijingChina
  3. 3.School of Civil Engineering and ArchitectureNanchang Institute of Science and TechnologyNanchangChina

Personalised recommendations