Design expressions for the in-plane shear capacity of confined masonry shear walls containing squat panels

Janaraj, Thangarajah & Dhanasekar, Manicka (2016) Design expressions for the in-plane shear capacity of confined masonry shear walls containing squat panels. Journal of Structural Engineering, 142(2), Article Number-04015127.

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In-plane shear capacity formulation of reinforced masonry is commonly conceived as the sum of the capacities of three parameters, viz, the masonry, the reinforcement, and the precompression. The term “masonry” incorporates the aspect ratio of the wall without any regard to the aspect ratio of the panels inscribed (and hence confined) by the vertical and the horizontal reinforced grout cores. This paper proposes design expressions in which the aspect ratio of such panels is explicitly included. For this purpose, the grouted confining cores are regarded as a grid of confining elements within which the panels are positioned. These confined masonry panels are then considered as building blocks for multi-bay, multi-storied confined masonry shear walls and analyzed using an experimentally validated macroscopic finite-element model. Results of the analyzes of 161 confined masonry walls containing panels of height to length ratio less than 1.0 have been regressed to formulate design expressions. These expressions have been first validated using independent test data sets and then compared with the existing equations in some selected international design standards. The concept of including the unreinforced masonry panel aspect ratio as an additional term in the design expression for partially grouted/confined masonry shear walls is recommended based on the conclusions from this paper.

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ID Code: 89630
Item Type: Journal Article
Refereed: Yes
Keywords: In-plane shear equation, Confined panel aspect ratio, Partially grouted masonry, Confined masonry, Concrete and masonry structures
DOI: 10.1061/(ASCE)ST.1943-541X.0001403
ISSN: 0733-9445
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 American Society of Civil Engineers
Deposited On: 29 Oct 2015 00:37
Last Modified: 11 Jul 2016 01:38

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