Stress-Strain Characteristics of Clay Brick Masonry under Uniaxial Compression
Publication: Journal of Materials in Civil Engineering
Volume 19, Issue 9
Abstract
The uniaxial monotonic compressive stress-strain behavior and other characteristics of unreinforced masonry and its constituents, i.e., solid clay bricks and mortar, have been studied by several laboratory tests. Based on the results and observations of the comprehensive experimental study, nonlinear stress-strain curves have been obtained for bricks, mortar, and masonry and six “control points” have been identified on the stress-strain curves of masonry, which can also be used to define the performance limit states of the masonry material or member. Using linear regression analysis, a simple analytical model has been proposed for obtaining the stress-strain curves for masonry that can be used in the analysis and design procedures. The model requires only the compressive strengths of bricks and mortar as input data, which can be easily obtained experimentally and also are generally available in codes. Simple relationships have been identified for obtaining the modulus of elasticity of bricks, mortar, and masonry from their corresponding compressive strengths. It was observed that for the strong and stiff bricks and mortar of lesser but comparable strength and stiffness, the stress-strain curves of masonry do not necessarily fall in between those of bricks and mortar.
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Acknowledgments
The writers gratefully acknowledge the help extended by Dr. K. K. Bajpai, Mr. Uma Mahesh Reddy, and the staff at the Structural Engineering Laboratory at IIT Kanpur in conducting the experiments. The financial assistance provided by the Ministry of Human Resource Development (MHRD), Government of India, is gratefully acknowledged.
References
ASTM. (2001a). “Standard test method for compressive strength of hydraulic cement mortars (using or 50-mm cube specimens).” Masonry test methods and specifications for the building industry, ASTM C 109/C 109M-99, 4th Ed., Philadelphia.
ASTM. (2001b). “Standard test method for compressive strength of masonry prisms.” Masonry test methods and specifications for the building industry, ASTMC 1314-00a, 4th Ed., Philadelphia.
ASTM. (2001c). “Standard test methods for sampling and testing brick and structural clay tile.” Masonry test methods and specifications for the building industry, ASTM-C67-00, 4th Ed., Philadelphia.
Atkinson, R. H., and Noland, J. L. (1983). “A proposed failure theory for brick masonry in compression.” Proc., 3rd Canadian Masonry Symp., Edmonton, Alta., Canada, 5.1–5.17.
Bennett, R. M., Boyd, K. A., and Flanagan, R. D. (1997). “Compressive properties of structural clay tile prisms.” J. Struct. Eng., 123(7), 920–926.
Binda, L., Fontana, A., and Frigerio, G. (1988). “Mechanical behaviour of brick masonries derived from unit and mortar characteristics.” Proc., 8th Int. Brick and Block Masonry Conf., Vol. 1, Dublin, Ireland, 205–216.
Canadian Standards Association (CSA). (2004). Design of masonry structures, S304.1, Ontario, Canada.
Dayaratnam, P. (1987). Brick and reinforced brick structures, Oxford and IBH, New Delhi, India.
Drysdale, R. G., Hamid, A. A., and Baker, L. R. (1994). Masonry structures: Behaviour and design, Prentice-Hall, Englewood Cliffs, N.J.
European Committee of Standardization (CEN). (1996). “Design of masonry structures. Part 1-1: General rules for buildings—Reinforced and unreinforced masonry.” ENV 1996-1-1, Eurocode 6, Brussels, Belgium.
Ewing, B. D., and Kowalsky, M. J. (2004). “Compressive behavior of unconfined and confined clay brick masonry.” J. Struct. Eng., 130(4), 650–661.
Federal Emergency Management Agency (FEMA). (1999). Evaluation of earthquake damaged concrete and masonry wall buildings, basic procedures manual, ATC-43, FEMA 306, Applied Technology Council, Calif.
Grimm, C. T. (1975). “Strength and related properties of brick masonry.” J. Struct. Div., 101(1), 217–232.
Hendry, A. W. (1998). Structural masonry, 2nd Ed., Macmillan, London.
International Code Council. (2003). International building code, Va.
Indian Standards (IS). (1987). Indian standard code of practice for structural use of unreinforced masonry, IS1905, 3rd Rev., Bureau of Indian Standards, New Delhi, India.
Indian Standards (IS). (1992a). Indian standard methods of test of burn clay building bricks—Part 1: Determination of compressive strength, IS 3495, 3rd Rev., Bureau of Indian Standards, New Delhi, India.
Indian Standards (IS). (1992b). Indian standard methods of test of burn clay building bricks—Part 2: Determination of water absorption, IS 3495, 3rd Rev., Bureau of Indian Standards, New Delhi, India.
Indian Standards (IS). (1995). Indian standard code of practice for preparation and use of masonry mortars, IS2250, 5th Rev., Bureau of Indian Standards, New Delhi, India.
Masonry Standards Joint Committee (MSJC). (2002). Building code requirements for masonry structures, ACI 530-02/ASCE 5-02/TMS 402-02, American Concrete Institute, Structural Engineering Institute of the American Society of Civil Engineers, The Masonry Society, Detroit.
McNary, W. S., and Abrams, D. P. (1985). “Mechanics of masonry in compression.” J. Struct. Eng., 111(4), 857–870.
Naraine, K., and Sinha, S. (1989). “Behavior of brick masonry under cyclic compressive loading.” J. Struct. Eng., 115(6), 1432–1445.
Paulay, T., and Priestley, M. J. N. (1992). Seismic design of reinforced concrete and masonry buildings, Wiley-Interscience, New York.
Priestley, M. J. N., and Elder, D. M. (1983). “Stress-strain curves for unconfined and confined concrete masonry.” ACI J., 80(3), 192–201.
Rai, D. C., and Goel, S. C. (1996). “Seismic strengthening of unreinforced masonry piers with steel elements.” Earthquake Spectra, 12(4), 845–862.
Sarangapani, G., Venkatarama Reddy, B. V., and Jagadish, K. S. (2002). “Structural characteristics of bricks, mortar and masonry.” J. Struct. Eng. (India), 29(2), 101–107.
Sarangapani, G., Venkatarama Reddy, B. V., and Jagadish, K. S. (2005). “Brick-mortar bond and masonry compressive strength.” J. Mater. Civ. Eng., 17(2), 229–237.
Sawko, F., and Rouf, M. A. (1984). “On the stiffness properties of masonry.” Proc. Inst. Civ. Eng., Part 2. Res. Theory, 77, 1–12.
Tomaževič, M. (1999). Earthquake-resistant design of masonry buildings, Imperial College Press, London.
Wesolowsky, G. O. (1976). Multiple regression and analysis of variance, Wiley, New York.
Wonnacott, T. H., and Wonnacott, R. J. (1972). Introductory statistics for business and economics, Wiley, New York.
Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 19 • Issue 9 • September 2007
Pages: 728 - 739
Copyright
© 2007 ASCE.
History
Received: Nov 20, 2005
Accepted: Jan 31, 2006
Published online: Sep 1, 2007
Published in print: Sep 2007
Notes
Note. Associate Editor: Chiara F. Ferraris
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