Experimental Investigation and Numerical Modeling of Peak Shear Stress of Brick Masonry Mortar Joint under Compression
Publication: Journal of Materials in Civil Engineering
Volume 26, Issue 9
Abstract
This paper presents a study on the shear load-displacement behavior of horizontal joints in unreinforced brick masonry subjected to constant compression. In general, under static shear loading masonry joints show a peak shear stress followed by a residual shear strength. To investigate these aspects in greater detail, triplet tests were conducted on masonry specimens using different types of mortar. The results found in this study and previous tests show that normal compressive stresses acting on the interface and the interface mortar strength affect the peak shear stress and the residual strength in a rather similar way. The cohesion and the internal friction angle, i.e., the two parameters required by the Mohr-Coulomb criterion, are then derived from a linear regression of the test results. The pre-peak and post-peak response of a masonry bed joint can best be represented by simple equations, and their shear stiffness depends on material properties and the magnitude of the normal compression. Computational modeling strategies are then presented considering the shear slip at the brick-mortar interface. The comparison of the model prediction with the results found in this study and previous tests shows the reliability of the proposed model for bed joint behavior.
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Acknowledgments
The authors gratefully acknowledge the financial and technical support for this experimental work from Hokkaido University. Mr. Kimura Tsutomu of Hokkaido University and Mr. Dillon Lunn of North Carolina State University are appreciated for their assistance during the experimental work. The MEXT is also greatly acknowledged for providing a scholarship to the first author.
References
Abdou, L., Saada, R. A., Meftah, F., and Mebarki, A. (2006). “Experimental investigations of the joint-mortar behavior.” Mech. Res. Comm., 33(3), 370–384.
Armaanidis, V. I. (1998). “A model for the shear strength of rough rock discontinuities under low normal stress.” M.Sc. dissertation, School of Civil Engineering and Geosciences, Univ. of Newcastle, Upon Tyne, U.K.
Arya, S. K., and Hegemier, G. A. (1978). “On nonlinear response prediction of concrete masonry assemblies.” Proc., North American Masonry Conf., Masonry Society, Boulder, CO, 19.1–19.24.
ASCE. (2003). “Handbook for the seismic evaluation of buildings.” ASCE 31-03, Building Seismic Safety Council for Federal Emergency Management Agency, Washington, DC.
ASTM. (2007a). “Standard specification for mortar for unit masonry.” C 270, West Conshohocken, PA.
ASTM. (2007b). “Standard test method for flow of hydraulic cement mortar.” C 1437, West Conshohocken, PA.
Atkinson, R. H., Amadei, B. P., Saeb, S., and Sture, S. (1989). “Response of masonry bed joints in direct shear.” J. Struct. Eng., 2276–2296.
Calvi, B. M., Macchi, G., and Zanon, P. (1985). “Random cyclic behavior of reinforced masonry under shear action.” Proc., 7th Int. Brick Masonry Conf., Melbourne, Australia.
Chaimoon, K., and Attard, M. M. (2007). “Modeling of unreinforced masonry walls under shear and compression.” J. Eng. Struct., 29(2007), 2056–2068.
Chaimoon, K., and Attard, M. M. (2009). “Experimental and numerical investigation of masonry under three-point bending (in-plane).” Eng. Struct., 31(1), 103–112.
Copleland, R. E., and Saxer, E. D. (1964). “Tests of structural bond of masonry mortars to concrete block.” ACI J., 61(11), 1411–1452.
Cundall, P. A. (1971). “A computer model for simulating progressive large-scale movements in block rock systems.” Proc., Int. Symp. Rock Fracture, Nancy, France, 2–8.
Dai, J., Ueda, T., and Sato, Y. (2005). “Development of non-linear bond stress-slip model of FRP sheet-concrete interfaces with a simple method.” J. Compos. Constr., 52–62.
El-Sakhawy, N. R., Raof, H. A., and Gouhar, A. (2002). “Shearing behavior of joints in load-bearing masonry wall.” J. Mater. Civ. Eng., 145–150.
European Committee for Standardization (CEN). (2000). “Determination of shear strength including damp proof course.” European norm for method of test for masonry units: Part 4. EN 1052-4, Brussels.
European Committee for Standardization (CEN). (2001). “Design of masonry structures. Part 1-1: General rules for building—Rules for reinforced and unreinforced masonry.”, CEN, Brussels, Belgium.
Gabor, A., Ferrier, E., Jacquelin, E., and Hamelin, P. (2006). “Analysis and modelling of the in-plane shear behavior of hollow brick masonry panels.” Constr. Build. Mater., 20(5), 308–321.
Goodman, R. E. (1976). Methods of geological engineering in discontinuous rocks, West Publishing, St Paul, MN.
Gottfredsen, F. R. (1997). “Laterally loaded masonry.” Ph.D. thesis, Danish Building Research Institute, Hørsholm, Denmark.
Hamid, A. A., and Drysdale, R. G. (1980). “Behavior of brick masonry under combined shear and compression loading.” Proc. 2nd Canadian Masonry Symp., Ottawa, Canada.
Hansen, K. F. (1999). “Bending and shear test with masonry.” SBI bulletin 123, Danish Building research Institute, Hørsholm, Denmark.
Lotfi, H. R., and Shing, P. B. (1991). “An appraisal of smeared crack models for masonry shear wall analysis.” Comput. Struct., 41(3), 413–425.
Lourenço, P. B., Barros, J. O., and Oliveira, J. T. (2004). “Shear testing of stack bonded masonry.” Constr. Build. Mater., 18(2), 125–132.
Lourenço, P. B., Rots, J. G., and Blaauwendraad, J. (1998). “Continuum model for masonry: Parameter estimation and validation.” J. Eng. Mech., 642–652.
Meli, R. (1973). “Behavior of masonry walls under lateral loads.” Proc., 5th World Congress on Earthquake Engineering, Rome, Italy, 853–862.
Nuss, L. K., Noland, J. L., and Chinn, J. (1978). “The parameters influencing shear strength between clay masonry units & mortar.” Proc., North American Masonry Conf., Boulder, CO.
Page, A. W. (1978). “Finite element model for masonry.” J. Struct. Div., 104(8), 1267–1285.
Rots, J. G. (199l). “Numerical simulation of cracking in structural masonry.” HERON, 36(2), 49–63.
Saeb, S., and Amadei, B. (1988). “Modeling joint response under constant or variable normal stiffness boundary conditions.” Int. J. Rock Mech. Mining Sci., 27(3), 213–217.
Van der Pluijm, R. (1993). “Shear behavior of bed joints.” Proc., 6th North American Masonry Conf., Philadelphia, PA, 125–136.
Van Zijl, G. P. A. G. (2004). “Modeling masonry shear-compression: Role of dilatancy highlighted.” J. Eng. Mech., 1289–1296.
Yokel, F. Y., and Fattal, S. G. (1975). “A failure hypothesis for masonry shear walls.”, National Bureau of Standards, Washington, DC.
Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 26 • Issue 9 • September 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jul 5, 2011
Accepted: Oct 14, 2013
Published online: Oct 16, 2013
Published in print: Sep 1, 2014
Discussion open until: Oct 15, 2014
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