Investigation of Brick Masonry Behaviour Under Uniaxial Compression Test at Different Scales
In the early era of performing physical studies on scaled masonry model, masonry was taken to be isotropic material, like concrete and its strength and stiffness remained unchanged under scaling. On the contrary, there were also studies suggesting that masonry was an anisotropic material and scaling affected its strength. This paper covers the experimental findings of scale effect on solid clay brick unit and masonry prism subjected to uniaxial compressive loading. The effect of scaling on constituent materials was assessed prior to the investigation of scale effect on masonry prism. Based on experimental results, compressive strength of half scale brick units is higher than full scale brick units. Similarly, compressive strength of half scale masonry prisms is also higher than full scale masonry prisms. Elastic modulus of half scale masonry prisms is smaller than full scale masonry prism. The ratio of mortar to brick unit strength of full scale masonry prisms is found to be governing the extent of increase in compressive strength of half scale masonry prisms. The reduction of scale effect on compressive strength of downscaled masonry is possible with smaller ratio of mortar to brick unit strength.
KeywordsMasonry behaviour Brick wall Scale effect Prototype and model
The authors would like to acknowledge the financial support from the School of Civil Engineering, Universiti Sains Malaysia for conducting the experimental study.
- 1.ASTM C109/C109M-07 (2007) Standard test method for compressive strength of hydraulic cement mortars (Using 2-in. or [50-mm] cube specimens)Google Scholar
- 2.ASTM C1314-14 (2014) Standard test method for compressive strength of masonry prismsGoogle Scholar
- 3.BS-EN772-1:2011 + A1:2015 (2015) Method of test for masonry units—part 1: determination of compressive strengthGoogle Scholar
- 4.Egermann R, Cook D, Anzani A (1991) Investigation into the behavior of scale model brick walls. Brick Block Masonry 1:628–635Google Scholar
- 5.Harris HG, Sabnis G (1999) Structural modeling and experimental techniques. CRC PressGoogle Scholar
- 6.Hughes T, Kitching N (2000) Small scale testing of masonry. In: Proceedings of 12th international brick/block masonry conference, pp 893–902Google Scholar
- 7.Jahangir B, Shamala S (2003) Mechanical behavior of structural brick masonry: an experimental evaluation. In: Proceedings of the 5th Asia-Pacific structural engineering and construction conference, 2003 Johor Bahru, Malaysia, pp 305–317Google Scholar
- 9.Mohammed AG (2006) Experimental comparison of brickwork behavior of prototype and model scales. Cardiff UniversityGoogle Scholar
- 11.MS76 (1972) Specification for bricks and blocks of fired brickearth, clay or shale—Part 2: Metric unitsGoogle Scholar
- 12.Signhal V, Rai DC (2013) Suitability of half-scale burnt clay bricks for shake table tests on masonry walls. J Mater Civ Eng 26(4):644–657Google Scholar