Development of a new design expression for the in-plane shear capacity of the partially grouted concrete masonry walls
Janaraj, Thangarajah & Dhanasekar, Manicka (2015) Development of a new design expression for the in-plane shear capacity of the partially grouted concrete masonry walls. In Sanjayan, Jay (Ed.) Proceedings of the 27th Biennial National Conference of the Concrete Institute of Australia in conjunction with the 69th RILEM week, Concrete Institute of Australia, Melbourne, Australia, pp. 332-342.
Partially grouted masonry walls subjected to in-plane shear exhibit a complex behaviour because of the influence of the aspect ratio, the pre-compression, the grouting pattern, the ratios of the horizontal and the vertical reinforcements, the boundary conditions and the characteristics of the constituent materials. The existing in-plane shear expressions for the partially grouted masonry are formulated as sum of strength of three parameters, namely, the masonry, the reinforcement and the axial force. The parameter ‘masonry’ includes the wall aspect ratio and the masonry compressive strength; the aspect ratio of the unreinforced panel inscribed into the grouted cores and bond beams are not considered, although failure is often dominated by these unreinforced masonry panels. This paper describes the dominance of these panels, particularly those that are squat, to the shear capacity of whole of shear walls. Further, the current design formulae are shown highly un-conservative by many researchers; this paper provides a potential reason for this un-conservativeness. It is shown that by including an additional term of the unreinforced panel aspect ratio a rational design formula could be established. This new expression is validated with independent test results reported in the literature – both Australian and overseas; the predictions are shown to be conservative.
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|Item Type:||Conference Paper|
|Keywords:||Partially grout, In-plane shear, Concrete masonry, Design formulae|
|Divisions:||Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 2015 [Please consult the authors]|
|Deposited On:||08 Sep 2015 05:08|
|Last Modified:||08 Sep 2015 22:05|
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