Accurate Estimation of Interface Shear Stresses in Composite Masonry Walls
Publication: Journal of Structural Engineering
Volume 120, Issue 3
Abstract
A composite masonry wall consists of a concrete‐block wythe, a clay‐brick wythe and a cavity (i.e., collar joint) between the two wythes that is filled with mortar or grout. The in‐plane loads on a composite wall due to gravity and/ or wind are generally applied on the block wythe and can produce large interface shear stresses in the collar joint. The composite action of the wall is ensured only if these shear stresses are less than the shear strength of the interfaces. A refined finite element procedure based on interface shear stiffness and considering stress singularity, which can accurately predict collar‐joint interface shear stresses in composite masonry walls, is proposed in this paper. This paper shows that there is no need to consider reduced shear stiffness for the interface elements. Additionally, accurate shear stresses at a collar‐joint interface can be obtained for discontinuously applied loads by disregarding stresses in the two elements closest to the point‐of‐stress singularity. Use of the proposed model permits accurate assessment of the interface shear stress in the collar joints of composite masonry walls.
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References
1.
Ali, S., and Page, A. W. (1987). “Nonlinear finite element analysis of masonry subjected to concentrated load.” Proc., Institute of Civil Engineers, London, England, 83(2), 815–832.
2.
Anand, S. C., and Rahman, M. A. (1991). “Numerical modeling of creep in composite masonry walls.” J. Struct Engrg., ASCE, 117(7), 2149–2165.
3.
Anand, S. C., and Rahman, M. A. (1992). “Thermal stresses in composite masonry walls.” Masonry Soc. J., 11(1), 21–28.
4.
Anand, S. C., and Yalamanchili, K. K. (1991). “Three dimensional failure analysis of composite masonry walls subjected to vertical and horizontal loads.” Proc., ASCE Struct. Congr., ASCE, New York, N.Y., 450–453.
5.
Anand, S. C., and Yalamanchili, K. K. (1993). “A numerical procedure to estimate failure loads in composite masonry walls.” Struct. Engrg. Rev., 5(1), 53–61.
6.
Anand, S. C., and Young, D. T. (1982). “A finite element model for composite masonry.” J. Struct. Div., ASCE, 108(12), 2637–2648.
7.
Anand, S. C., Yalamanchili, K. K., and Rahman, M. A. (1991). “Stiffness effects on the maximum shear stress in the collar joint of a composite masonry wall.” Proc., 9th Int. Brick/Block Masonry Conf., Deutsche Gesellschaft für Mauerwerksbau, Bonn, Germany, 980–987.
8.
Binda, L., and Anti, F. L. (1991). “Load transfer in multiple leaf masonry walls.” Proc., 9th Int. Brick/Block Masonry Conf., Deutsche Gesellschaft für Mauerwerksbau, Bonn, Germany, 1488–1497.
9.
Brown, R. H., and Cousins, T. E. (1983). “Shear strength of slushed composite masonry collar joints.” Proc., 3rd Can. Masonry Symp., University of Alberta, Edmonton, Alberta, 38.1–38.16.
10.
“Building code requirements for masonry structures.” (1989). ACI 530‐88/ASCE 5‐88, American Concrete Institute (ACI), Detroit, Mich.
11.
Colville, J., Matty, S., and Wolde‐Tinsae, A. (1987). “Shear capacity of mortared collar joints.” Proc., 4th North Am. Masonry Conf., The Masonry Society, Boulder, Colo., 60.1–60.15.
12.
Desai, C. S. (1976). “Finite element method for analysis and design of piles.” Miscellaneous Paper S‐76‐21, U.S. Army Engineer Waterways Experiment Station, Vicksburg, Miss.
13.
Desai, C. S. (1981). “Behavior of interfaces between structural and geologic media.” Int. Conf. on Recent Adv. in Geotech. Earthquake Engrg. and Soil Dynamics, University of Missouri, at Rolla, Mo., 619–638.
14.
Desai, C. S., Zaman, M. M., Lightner, J. G., and Siriwardane, H. J. (1984). “Thin‐layer element for interfaces and joints.” Int. J. for Numer. and Anal. Meth. in Geomech., Oxford, England, 8(1), 19–43.
15.
Goodman, R. E., Taylor, R. L., and Brekke, T. L. (1968). “A model for the mechanics of jointed rock.” J. Soil Mech. and Found. Div., ASCE, 94(3), 637–659.
16.
Grimm, C. T., and Fowler, D. W. (1979). “Differential movement in composite load bearing masonry walls.” J. Struct. Div., ASCE, 105(7), 1277–1288.
17.
Haagblad, B., and Nordgren, G. (1987). “Modelling nonlinear soil‐structure interaction using interface elements, elastic‐plastic soil elements and absorbing infinite elements.” Comp. and Struct., 26(1–2), 307–324.
18.
Matty, S. A., Colville, J., and Wolde‐Tinsae, A. M. (1988). “Load transfer in composite masonry.” Proc., 8th Int. Brick/Block Masonry Conf., Elsevier Applied Science, London, England, 372–383.
19.
McCarthy, J. A., Brown, R. H., and Cousins, T. E. (1985). “An experimental study of the shear strength of the collar joint in grouted and slushed composite masonry walls.” Proc., 3rd North Am. Masonry Conf., The Masonry Society, Boulder, Colo., 39.1–39.16.
20.
Page, A. W. (1978). “Finite element model for masonry.” J. Struct. Div., ASCE, 104(7), 1267–1285.
21.
Pande, G. N., and Sharma, K. G. (1979). “On joint/interface elements and associated problems of numerical illconditioning.” Int. J. for Numer. and Anal. Meth. in Geomech., Oxford, England, 3(2), 293–300.
22.
Porter, M. L., Wolde‐Tinsae, A. M., and Ahmed, M. H. (1986). “Strength analysis of composite walls.” Proc., ASCE Struct. Congr. '86, ASCE, New York, N.Y., 94–110.
23.
Rahman, M. A. (1989). “Analytical investigation of the behavior and failure of composite masonry walls,” PhD thesis, Clemson University, at Clemson, S.C.
24.
Rahman, M. A., and Anand, S. C. (1989). “A failure criterion for concrete block‐mortar joints in masonry walls.” Proc., 5th Can. Masonry Symp., Vancouver, British Columbia, 79–89.
25.
Rao, M. (1989). “Experimental evaluation of composite masonry walls subjected to axial and shear loads,” MSc thesis, Clemson University, at Clemson, S.C.
26.
Sahlin, S. (1979). Structural Masonry. Prentice Hall, Englewood Cliffs, N.J.
27.
Whitcomb, J. D., Raju, I. S., and Goree, J. G. (1982). “Reliability of the finite element method for calculating free edge stresses in composite laminates.” Comp. and Struct., 15(1), 23–37.
28.
Williams, R. T., and Geschwindner, L. F. (1982). “Shear stress across collar joints in composite masonry walls.” Proc., 2nd North Am. Masonry Conf., The Masonry Society, Boulder, Colo., 8.1–8.17.
29.
Wolde‐Tinsae, A. W., Colville, T., and Matty, S. A. (1988). “Differential movement in composite masonry walls.” Proc., 8th Int. Brick/Block Masonry Conf., Elsevier Applied Science, London, England, 1089–1100.
30.
Yalamanchili, K. K. (1990). “Finite element computations on supercomputers and their applications to failure analysis of composite masonry walls,” PhD thesis, Clemson University, at Clemson, S.C.
31.
Young, D. T., and Dehdasht, A. H. (1990). “Interlaminar shearing stresses in composite masonry walls with openings.” Proc., 5th North Am. Masonry Conf., The Masonry Society, Boulder, Colo., 1099–1110.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 120 • Issue 3 • March 1994
Pages: 998 - 1015
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Jan 14, 1993
Published online: Mar 1, 1994
Published in print: Mar 1994
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