A computational modelling approach for low bond strength masonry

Sarhosis, Vasilis, Garrity, Stephen and Sheng, Yong 2012. A computational modelling approach for low bond strength masonry. Presented at: 8th International Conference on Structural Analysis of Historical Constructions, SAHC 2012, Wrocław, Poland, 15-17 October 2012. Published in: Jasieńko, J. ed. Structural analysis of historical constructions: Proceedings of the International Conference on Structural Analysis of Historical Constructions, SAHC 2012, 15-17 October 2012, Wrocław, Poland. Wrocław: Dolnośląskie Wydawnictwo Edukacyjne, pp. 559-566.

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Abstract

Historical masonry is typically characterised by its low bond strength. Cracking of such masonry is often as a result of the de-bonding of the masonry units from the mortar joints and the post-cracking response up to collapse is influenced by the characteristics of the masonry unit/mortar interface. The development of a computational model that is applicable for low bond strength fired clay brick masonry is described. Using software based on the Distinct Element Method of analysis, bricks were represented as an assemblage of distinct blocks. The mortar joints were modelled as zero thickness interfaces which can open or close depending on the magnitude and direction of the stresses applied to them. The material parameters for the masonry constitutive model were obtained from the results from the load testing of large wall/beam clay brick masonry panels in the laboratory. Initially the panels were modelled computationally using an assumed set of material parameters. The differences between the results obtained experimentally and numerically were then minimized by adjusting the parameters in the constitutive model using an optimization technique. The model was then used with the optimized parameters to predict the structural response of other unreinforced and reinforced wall/beams that had been tested previously in the laboratory. Good correlation was obtained with the experimental results.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TH Building construction
Uncontrolled Keywords:	Bricks, Bond, Computational modelling, Masonry
Publisher:	Dolnośląskie Wydawnictwo Edukacyjne
ISBN:	9788371252167
Last Modified:	12 Oct 2016 03:02
URI:	https://orca.cardiff.ac.uk/id/eprint/56674

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