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Materials and Structures

, Volume 45, Issue 6, pp 829–839 | Cite as

Structural behavior of low- and normal-strength interface mortar of masonry

  • Thomas Zimmermann
  • Alfred Strauss
  • Konrad Bergmeister
Original Article

Abstract

Building with masonry is based on the experience of many centuries. Although this design is used worldwide, knowledge about the material behaviour of masonry is still subject to uncertainties. The determination of safety of these structures against earthquakes is a complex challenge. For instance it depends on the resistance of the structure, the seismic action and on many uncertain structural details. One of the key parameters regarding the resistance is the shear strength of the masonry. A series of tests on mortar prisms according to EN 1015-11 was performed in which the mortar properties were varied in order to measure bending and compressive strength. In a second test program, the shear strength of the masonry was tested according to EN 1052-3. Shear triplets were made to establish the shear strength variation due to deliberate variation of the mortar properties. In addition, for both tests on mortar prisms and tests on shear triplets, descriptive statistical parameters were calculated and an attempt was made to describe the datasets with probabilistic distributions for further dimensioning and stochastic assessments.

Keywords

Shear strength Coefficient of friction Old masonry 

Notes

Acknowledgments

Research results discussed in this paper were carried out within the European research project SEISMID, supported and financed in cooperation with the Centre for Innovation and Technology (ZIT). We also wish to thank Mr. Walter Brusatti (Brusatti GmbH) for providing bricks and further Mr. Johann Lang from the College of Civil Engineering (HTBL Krems) Austria, for his efficient help during testing in the laboratory.

References

  1. 1.
    EN-1996-1-1 (2006) Eurocode 6: Design of masonry structures—part 1-1: common rules for reinforced and unreinforced masonry structuresGoogle Scholar
  2. 2.
    EN-1052-3 (2007) Methods of test for masonry—part 3: determination of initial shear strengthGoogle Scholar
  3. 3.
    Tomazevic M (2008) Shear resistance of masonry walls and eurocode 6: shear versus tensile strength of masonry. Mater Struct 42:889–907CrossRefGoogle Scholar
  4. 4.
    EN-772-16 (2005) Methods of test for masonry units—part 1: determination of dimensionsGoogle Scholar
  5. 5.
    EN-772-1 (2000) Methods of test for masonry units—part 1: determination of compressive strengthGoogle Scholar
  6. 6.
    Zimmermann T, Strauss A, Bergmeister K (2010) Numerical investigations of historic masonry walls under normal and shear load. Constr Build Mater 24:1385–1391CrossRefGoogle Scholar
  7. 7.
    EN-1015-11 (2007) Methods of test for mortar for masonry—part 11: determination of flexural and compressive strength of hardened mortarGoogle Scholar
  8. 8.
    Edgell G (2005) Testing of ceramics in construction. Whittles Publishing Ltd., Stoke-on-TrentGoogle Scholar
  9. 9.
    Hofmann P, Stoeckl S (1986) Tests on the shear-bond behaviour in the bed-joints of masonry. Mason Int 9:1–15Google Scholar
  10. 10.
    Riddington J, Fong K, Jukes P (1997) Numerical study of failure initiation in different joint shear tests. Mason Int 11:44–50Google Scholar
  11. 11.
    Van der Pluijm R (1993) Shear behavior of bed joints. In: Proceedings of 6th North American masonry conference, 7–9 June 1993Google Scholar
  12. 12.
    Hamid A, Drysdale R, Heidebrecht A (1979) Shear strength of concrete masonry joints. J Struct Div ASCE 105:1227–1240Google Scholar
  13. 13.
    Abdou L, Ami Saada R, Meftha F (2006) Experimental investigations of the joint mortar behavior. Mech Res Commun 33:370–384CrossRefGoogle Scholar
  14. 14.
    Popal R, Lissel S (2010) Numerical evaluation of existing mortar joint shear tests and a new test method. In: Proceedings of 8th international masonry conference, 4–7 July 2010Google Scholar
  15. 15.
    Jukes P, Riddington J (1997) A review of masonry joint shear strength test methods. Bull Br Mason Soc Mason Int 11:37–43Google Scholar
  16. 16.
    Stoeckl S, Hofmann P, Mainz J (1990) A comparative finite element evaluation of mortar joint shear tests. Mason Int 3:101–104Google Scholar
  17. 17.
    B-1996-1-1 (2006) Eurocode 6: design of masonry structures—part 1-1: common rules for reinforced and unreinforced masonry structures; national annexGoogle Scholar
  18. 18.
    Kundu D, Raqab M (2005) Generalized rayleigh distribution: different methods of estimations. Comput Stat Data Anal 49:187–200MathSciNetMATHCrossRefGoogle Scholar
  19. 19.
    Kundu D, Raqab M (2009) Estimation of r = p(y < x) for three-parameter weibull distribution. Stat Probab Lett 79:1839–1846MathSciNetMATHCrossRefGoogle Scholar
  20. 20.
    Misra N, Choudhary PK, Dhariyal ID, Kundu D (2002) Smooth estimators for estimating order restricted scale parameters of two gamma distributions. Metrika 56:143–161MathSciNetCrossRefGoogle Scholar
  21. 21.
    Amadio C, Rajgelj S (1991) Shear behaviour of brick-mortar joints. Mason Int 5:19–22Google Scholar
  22. 22.
    Benjamin J, Williams H (1958) The behaviour of one-story brick shear walls. J Struct Div ASCE 84:1–30Google Scholar
  23. 23.
    Chin WJ (1972) Shear resistance of masonry walls. PhD thesis, University of LondonGoogle Scholar
  24. 24.
    Ghazali M, Riddington J (1986) Shear strength of brickwork. In: Proceedings of 1st East Asian conference on structural engineering and constructionGoogle Scholar
  25. 25.
    Hegemeir G, Arya S, Krishnamoorthy G, Nachbar W, Furgerson R (1978) On the behaviour of joints on concrete masonry. In: Proceedings of North American masonry conferenceGoogle Scholar
  26. 26.
    Jukes P (1997) An investigation into the shear strength of masonry joints. PhD thesis, University of SussexGoogle Scholar
  27. 27.
    Khalaf F (1995) Simple bending test for the determination of masonry bond shear strength. In: Proceedings of 4th international masonry conference, LondonGoogle Scholar
  28. 28.
    Page A (1988) Influence of material properties on the behaviour of brick masonry shear walls. In: Proceedings of 8th international brick/block masonry conference, Dublin, IrelandGoogle Scholar
  29. 29.
    Sinha B, Hendry A (1966) Further investigations of bond tension, bond shear and the effect of precompression on shear strength of model brick masonry couplets. The British Ceramic Reasearch Association, note 40Google Scholar
  30. 30.
    Van der Pluijm R (1992) Material properties of masonry and its components under tension and shear. In: Proceedings of 6th Canadian masonry conference, 15–17 June 1992Google Scholar
  31. 31.
    Van der Pluijm R (1995) Numerical evaluation of bond tests on masonry. Mason Int 9:16–24Google Scholar
  32. 32.
    Vermeltfoort A (2010) Variation in shear properties of masonry. In: Proceedings of 8th international masonry conference, 4–7 July 2010Google Scholar
  33. 33.
    Vermeltfoort A, Martens D (2009) Variation in mechanical properties of mortar and masonry. In: Proceedings of 11th Canadian masonry symposium, 31 May–3 June 2009Google Scholar
  34. 34.
    RILEM-TC (2001) Reliability analysis principles. In: Diamantidis D (ed) Report rep032: probabilistic assessment of existing structures—JCSS Report. RILEM Publications SARL, Bagneux, pp 133–162Google Scholar
  35. 35.
    Vrouwenvelder A (1996) Evaluation of existing structures, item codification. In: IABSE congress, Copenhagen, JuneGoogle Scholar
  36. 36.
    Strauss A, Frangopol D, Kim S (2008) Use of monitoring extreme data for the performance prediction of structures: Bayesian updating. Eng Struct 30:3654–3666CrossRefGoogle Scholar
  37. 37.
    Hoffmann S, Wendner R, Strauss A, Steinhauser W (2009) Aifit—user oriented identification for engineering structures—field test. Beton- und Stahlbetonbau 104:113–120CrossRefGoogle Scholar
  38. 38.
    ISO-13822 (2010) Bases for design of structures—assessment of existing structuresGoogle Scholar
  39. 39.
    EN-1998-3 (2005) Eurocode 8: design of structures for earthquake resistance—part 3: assessment and retrofitting of buildingsGoogle Scholar

Copyright information

© RILEM 2011

Authors and Affiliations

  • Thomas Zimmermann
    • 1
  • Alfred Strauss
    • 1
  • Konrad Bergmeister
    • 1
  1. 1.Institute for Structural EngineeringUniversity of Natural Resources and Life SciencesViennaAustria

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