Structural Engineering and Mechanics

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Evaluating the pull-out load capacity of steel bolt using Schmidt hammer and ultrasonic pulse velocity test

  • Saleem, Muhammad (Department of Mechanical and Energy Engineering, College of Engineering, Imam Abdulrahman Bin Faisal University)
  • Received : 2017.07.29
  • Accepted : 2018.01.03
  • Published : 2018.03.10
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Abstract

Steel bolts are used in the construction industry for a large variety of applications that range from fixing permanent installations to temporary fixtures. In the past much research has been focused on developing destructive testing techniques to estimate their pull-out load carrying capacity with very little attention to develop non-destructive techniques. In this regards the presented research work details the combined use of ultrasonic pulse velocity and Schmidt hammer tests to identify anchor bolts with faculty installation and to estimate their pull-out strength by relating it to the Schmidt hammer rebound value. From experimentation, it was observed that the load capacity of bolt depends on its embedment length, diameter, bond quality/concrete strength and alignment. Ultrasonic pulse velocity test is used to judge the quality of bond of embedded anchor bolt by relating the increase in ultrasonic pulse transit time to the presence of internal pours and cracks in the vicinity of steel bolt and the surrounding concrete. This information combined with the Schmidt hammer rebound number, R, can be used to accurately identify defective bolts which resulted in lower pull-out strength. 12 mm diameter bolts with embedment length of 70 mm and 50 mm were investigated using constant strength concrete. Pull-out load capacity versus the Schmidt hammer rebound number for each embedment length is presented.

Keywords

References

  1. ASTM Test Designation C 597-02 (2003), Standard Test Method for Pulse Velocity through Concrete, Annual Book of ASTM Standards, West Conshohocken, PA, U.S.A.
  2. BS 1881, Part 203 (1986), Recommendations for Measurement of Velocity of Ultrasonic Pulses in Concrete, British Standards Institution, London, U.K.
  3. Brozovsky, J. and Zach, J. (2011), "Influence of surface preparation method on the concrete rebound number obtained from impact hammer test, Proceedings of the 5th Pan American Conference for Non-Destructive Testing, Cancun, Mexico.
  4. Cargill, J.S. and Shakoor, A. (1990). "Evaluation of empirical methods for measuring the uniaxial compressive strength of rock", J. Rock Mech. Min. Sci. Geomech., 27, 495-503. https://doi.org/10.1016/0148-9062(90)91001-N
  5. Guillet, T. (2011), "Behavior of metal anchors under combined tension and shear cycling loads", ACI Struct. J., 108(3), 315-323.
  6. Hoehler, M.S. and Eligehausen, R. (2008), "Behavior and testing of anchors in simulated seismic cracks", ACI Struct. J., 105(3), 348-357.
  7. Hoehler, M.S. and Eligehausen, R. (2008), "Behavior of anchors in cracked concrete under tension cycling at near-ultimate loads", ACI Struct. J., 105(5), 601-608.
  8. Li, J., Gao, X. and Zhang, P. (2007), "Experimental Investigation on the bond of reinforcing bars in high performance concrete under cyclic loading", Mater. Struct., 40(3), 1027-1044. https://doi.org/10.1617/s11527-006-9201-1
  9. Liu, J., Sue, M. and Kou, C. (2009), "Estimating the strength of concrete using surface rebound value and design parameters of concrete material", Tamkang J. Sci. Eng., 12(1), 1-7.
  10. Katalin, S. (2013), "Rebound surface hardness and related properties of concrete", Ph.D. Dissertation, Budapest University of Technology and Economics, Hungary.
  11. Mutlib, N.K., Baharom, S.B., El-Shafie, A. and Nuawi, M.Z. (2016), "Ultrasonic health monitoring in structural engineering: Buildings and bridges", Struct. Contr. Health Monitor., 23, 409-422. https://doi.org/10.1002/stc.1800
  12. Mandal, T., Tinjum, J.M. and Edil, T.B. (2016), "Non-destructive testing of cementitiously stabilized materials using ultrasonic pulse velocity test", Transp. Geotech., 6, 97-107. https://doi.org/10.1016/j.trgeo.2015.09.003
  13. Philipp, M., Eligehausen, R., Hutchinson, T.C. and Matthew, S.H. (2016), "Behavior of post-installed anchors tested by stepwise increasing cyclic load protocols", ACI Struct. J., 113(5), 997-1008.
  14. Qasrawi, H.Y. and Marie, I.A. (2013), "The use of USPV to anticipate failure in concrete under compression", Cement Concrete Res., 33(12), 2017-2021. https://doi.org/10.1016/S0008-8846(03)00218-7
  15. RILEM Recommendation NDT 1 (1972), Testing of Concrete by the Ultrasonic Pulse Method, RILEM Publications, Paris, France.
  16. Saleem, M. (2017), "Study to detect bond degradation in reinforced concrete beams using ultrasonic pulse velocity test method", Struct. Eng. Mech., 64(4), 427-436. https://doi.org/10.12989/SEM.2017.64.4.427
  17. Saleem, M., Al-Kutti, W., Al-Akhras, N. and Haider, H. (2016), "Non-destructive testing method to evaluate the load carrying capacity of concrete anchors", J. Constr. Eng. Manage., 142(5), 17-29.
  18. Saleem, M. and Nasir, M. (2016), "Bond evaluation of concrete bolts subjected to impact loading", J. Mater. Struct., 49(9), 3635-3646. https://doi.org/10.1617/s11527-015-0745-9
  19. Saleem, M. (2014), "Cyclic pull-out push-in shear-lag model for post-installed anchor-infill assembly", Arab. J. Sci. Eng., 39(12), 8537-8547. https://doi.org/10.1007/s13369-014-1423-x
  20. Saleem, M. and Tsubaki, T. (2010), "Multi-layer model for pullout behavior of post-installed anchor", Proceedings of the FRAMCOS-7, Fracture Mechanics of Concrete Structures, AEDIFICATIO, Germany.
  21. Tarun, R.N., Malhotra, M.V. and Popovics, S.J. (2004), The Ultrasonic Pulse Velocity Method, CRC Press LLC, London, U.K.
  22. Torabi, S.R., Ataei, M. and Javanshir, M. (2010), "Application of Schmidt rebound number for estimating rock strength under specific geological conditions", J. Min. Environ., 1(2), 1-8.
  23. Umais, K., Al-Osta, M.A. and Ibrahim, A. (2017), "Modeling shear behavior of reinforced concrete beams strengthened with externally bonded CFRP sheets", Struct. Eng. Mech., 61(1), 125-142. https://doi.org/10.12989/sem.2017.61.1.125
  24. Chen, Z., Xu, J., Ying, L. and Su, Y. (2014), "Bond behaviors of shape steel embedded in recycled aggregate concrete and recycled aggregate concrete filled in steel tubes", Struct. Eng. Mech., 17(6), 347-360.

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