Comparison of Simultaneous Bender Elements and Resonant Column Tests on Porto Residual Soil

  • Cristiana Ferreira
  • António da Fonseca
  • Jaime A. Santos
Part of the Solid Mechanics and Its Applications book series (SMIA, volume 146)

Abstract

Bender elements are a powerful and increasingly common laboratory tool for determining the shear wave velocity hence the small strain shear stiffness (G0) in soil samples. There are several advantages of the bender element technique, namely its simplicity and ease of use; however, there is no standard developed for this technique as the interpretation of the results involves some uncertainty and subjectivity. Different approaches have been proposed to deal with these issues, especially in terms of the interpretation techniques, based on the time and on the frequency domain. In the present work, a modified resonant column, equipped with bender elements, has been used, where shear wave velocities can be measured independently and different interpretation methodologies of the bender element results can be applied. For this study, natural samples of Porto granitic residual soil were tested, since this geomaterial has been object of research and interest for many years in the University of Porto. The paper will focus on the comparison of simultaneous results of shear wave velocities by the resonant column and the bender elements. It is intended to provide some contribution to the routine laboratory practice using bender elements, with further insight in the interpretation of the results.

Keywords

Clay Permeability Attenuation Coherence Sine 

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References

  1. Arroyo, M. (2001). Pulse tests in soil samples. PhD thesis, University of Bristol, UK.Google Scholar
  2. Arroyo, M.; Medina, L. and Muir Wood, D. (2002). Numerical modelling of scale effects in bender-based pulse tests. NUMOG VIII, Pande, G.N. & Pietruszczak, S. (eds), pp. 589–594.Google Scholar
  3. Arulnathan, R.; Boulanger, R.W. and Riemer, M.F. (1998). Analysis of Bender Element Tests. Geotechnical Testing Journal, Vol. 21,No. 2, pp. 120–131.CrossRefGoogle Scholar
  4. Blewett, J.; Blewett, I.J. and Woodward, P.K. (1999) Measurement of shear wave velocity using phase sensitive detection techniques. Canadian Geotechnical Journal 36, pp. 934–939.CrossRefGoogle Scholar
  5. Blewett, J.; Blewett, I.J. and Woodward, P.K. (2000). Phase and amplitude responses associated with the measurement of shear-wave velocity in sand by bender elements. Canadian Geotechnical Journal, Vol. 37, pp. 1348–1357.CrossRefGoogle Scholar
  6. Brocanelli, D. and Rinaldi, V. (1998). Measurement of low strain material damping and wave velocity with bender elements in the frequency domain. Canadian Geotechnical Journal, Vol. 35, pp. 1032–1040.CrossRefGoogle Scholar
  7. Dyvik, R. and Madhsus, C. (1985). Lab measurements of Gmax using bender elements. Proceedings ASCE Annual Convention: Advances in the art of testing soils under cyclic conditions, Detroit, Michigan, pp. 186–197.Google Scholar
  8. Fam, M. A.; Cascante, G. and Dusseault, M. B. (2002). Large and Small Strain Properties of Sands Subjected to Local Void Increase. Journal of Geotechnical and Geoenvironmental Engineering, Vol. 128,No. 12, pp. 1018–1025.CrossRefGoogle Scholar
  9. Fratta, D. and Santamarina, J.C. (1996). Wave propagation in soils: Multi-mode, wide-band testing in a waveguide device. Geotechnical Testing Journal, Vol. 19,No. 2, pp. 130–140.CrossRefGoogle Scholar
  10. Gordon, M.A. and Clayton, C.R.I (1997). Measurement of stiffness of soils using small strains triaxial testing and bender elements. Modern Geophysics in Engineering Geology. McCann, D.M.; Eddleston, M.; Fenning, P.J. & Reeves, G.M. (eds.). Geological Society Engineering Geology Special Publication, No. 12, pp. 365–371.Google Scholar
  11. Greening, P.D. and Nash, D.F.T. (2004). Frequency domain determination of G0 using bender elements. ASTM Geotechnical Testing Journal, Vol. 27,No. 3, pp. 288–294.Google Scholar
  12. Greening, P.D.; Nash, D.F.T.; Benahmed, N.; Viana da Fonseca, A. and Ferreira, C. (2003). Comparison of shear wave velocity measurements in different materials using time and frequency domain techniques. Proceedings of Deformation Characteristics of Geomaterials, Lyon, France, 22–24 September, Lyon, France: Balkema, pp. 381–386.Google Scholar
  13. Hardy, S.; Zdravkovic, L. and Potts, D.M. (2002). Numerical interpretation of continuously cycled bender element tests. Numerical Models in Geomechanics (NUMOG VII). Pande & Pietruszczak (eds.). Swets & Zeitlinger, Lisse, pp. 595–600.CrossRefGoogle Scholar
  14. Jamiolkowski, M.; Lancellotta, R. and Lo Presti, D.C.F. (1995). Remarks on the stiffness at small strains of six Italian clays. Pre-failure Deformation of Geomaterials. Shibuya, Mitachi & Miura (eds). Balkema, Rotterdam, pp. 817–836.Google Scholar
  15. Jovicic, V.; Coop, M.R. and Simic, M. (1996). Objective criteria for determining Gmax from bender element tests. Geotéchnique, Vol. 46,No. 2, pp. 357–362.CrossRefGoogle Scholar
  16. Jovicic, V. (2004). Rigorous bender element testing. Workshop on Bender Element Testing of Soils, UCL, London.Google Scholar
  17. Kaarsberg, E.A. (1975). Elastic wave velocity measurements in rocks and other materials by phase-delay methods. Geophysics, Vol. 40, pp. 855–901.CrossRefGoogle Scholar
  18. Lee, J. S. and Santamarina, C. (2005). Large and Small Strain Properties of Sands Subjected to Local Void Increase. Journal of Geotechnical and Geoenvironmental Engineering, Vol. 131,No. 9, pp. 1063–1070.CrossRefGoogle Scholar
  19. Moncaster, A.M. (1997). The shear modulus of sand at very small strains. MSc thesis. Department of Civil Engineering, University of Bristol, UK.Google Scholar
  20. Pennington, D.S. (1999). The anisotropic small strain stiffness of Cambridge Gault clay. PhD thesis, Department of Civil Engineering, Univ. Bristol.Google Scholar
  21. Rio, J.; Greening, P. and Medina, L. (2003). Influence of sample geometry on shear wave propagation using bender elements. Proceedings of Deformation Characteristics of Geomaterials, Lyon, France, 22–24 September, Lyon, France: Balkema, pp. 963–967.Google Scholar
  22. Sánchez-Salinero I, Roesset JM & Stokoe II KH (1987) Analytical studies of wave propagation and attenuation Geotechnical report No GR86-15. Civil Engineering department, University of Texas at Austin.Google Scholar
  23. Viana da Fonseca, A. (2003). Characterising and deriving engineering properties of a saprolitic soil from granite, in Porto. ‘Characterisation and Engineering Properties of Natural Soils’. Swets & Zeitlinger, Lisse, pp. 1341–1378.Google Scholar
  24. Viggiani, G.; Atkinson, J.H.(1995). Interpretation of bender element tests. Géotechnique, Vol. 45,No. 1, pp. 149–154.CrossRefGoogle Scholar

Copyright information

© Springer 2007

Authors and Affiliations

  • Cristiana Ferreira
    • 1
  • António da Fonseca
    • 1
  • Jaime A. Santos
    • 2
  1. 1.Department of Civil EngineeringFaculdade de Engenharia da Universidade do Porto Rua Roberto FriasPortoPortugal
  2. 2.Department of Civil EngineeringInstituto Superior Técnico Av. Rovisco PaisLisboaPortugal

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