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    Response of Masonry Bed Joints in Direct Shear

    Source: Journal of Structural Engineering:;1989:;Volume ( 115 ):;issue: 009
    Author:
    R. H. Atkinson
    ,
    B. P. Amadei
    ,
    S. Saeb
    ,
    S. Sture
    DOI: 10.1061/(ASCE)0733-9445(1989)115:9(2276)
    Publisher: American Society of Civil Engineers
    Abstract: This paper examines the horizontal bed joint shear failure mode and the shear load‐displacement behavior of unreinforced brick masonry during static and cyclic loading. Laboratory tests are conducted on masonry samples using a servo‐controlled direct shear apparatus. A total of 44 tests are conducted on old clay unit‐1:2:9 mortar specimens and 9 tests on new clay unit‐1:1.5:4.5 mortar specimens (laboratory specimens). In addition, three tests are conducted on field specimens collected from older brick walls damaged during the Whittier earthquake. In general, under cyclic shear loading, masonry bed joints show a peak strength for the first cycle followed by residual shear strength. Both peak and residual shear strengths are well represented by the Mohr Coulomb criterion, with friction coefficients ranging between 0.64 and 0.75 for the laboratory specimens. The field specimens show lower shear strength values. The pre‐peak response of masonry bed joints can best be represented by a hyperbolic curve and their shear stiffness depends on both the shear displacement and normal load level.
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      Response of Masonry Bed Joints in Direct Shear

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/30672
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    • Journal of Structural Engineering

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    contributor authorR. H. Atkinson
    contributor authorB. P. Amadei
    contributor authorS. Saeb
    contributor authorS. Sture
    date accessioned2017-05-08T20:53:28Z
    date available2017-05-08T20:53:28Z
    date copyrightSeptember 1989
    date issued1989
    identifier other%28asce%290733-9445%281989%29115%3A9%282276%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/30672
    description abstractThis paper examines the horizontal bed joint shear failure mode and the shear load‐displacement behavior of unreinforced brick masonry during static and cyclic loading. Laboratory tests are conducted on masonry samples using a servo‐controlled direct shear apparatus. A total of 44 tests are conducted on old clay unit‐1:2:9 mortar specimens and 9 tests on new clay unit‐1:1.5:4.5 mortar specimens (laboratory specimens). In addition, three tests are conducted on field specimens collected from older brick walls damaged during the Whittier earthquake. In general, under cyclic shear loading, masonry bed joints show a peak strength for the first cycle followed by residual shear strength. Both peak and residual shear strengths are well represented by the Mohr Coulomb criterion, with friction coefficients ranging between 0.64 and 0.75 for the laboratory specimens. The field specimens show lower shear strength values. The pre‐peak response of masonry bed joints can best be represented by a hyperbolic curve and their shear stiffness depends on both the shear displacement and normal load level.
    publisherAmerican Society of Civil Engineers
    titleResponse of Masonry Bed Joints in Direct Shear
    typeJournal Paper
    journal volume115
    journal issue9
    journal titleJournal of Structural Engineering
    identifier doi10.1061/(ASCE)0733-9445(1989)115:9(2276)
    treeJournal of Structural Engineering:;1989:;Volume ( 115 ):;issue: 009
    contenttypeFulltext
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