Experimental investigation of compressive failure in masonry brick assemblages made with soft brick

Ravula, M B and K V L, Subramaniam (2017) Experimental investigation of compressive failure in masonry brick assemblages made with soft brick. Materials and Structures, 50 (1). UNSP 19. ISSN 1359-5997

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An experimental investigation of compressive failure in masonry made of soft clay bricks is presented. Masonry assemblages are tested to evaluate the influence of the relative strength of mortar on the observed damage evolution and compressive failure. Damage evolution associated with the formation and propagation of vertical splitting cracks during the compressive load response of masonry assemblages in the stack bonded arrangement are studied using a fullfield optical technique based on digital image correlation. Using image correlation, clear evidence of the crack forming in the mortar and propagating into the brick is established. Damage is associated with cracking in the mortar due to lateral tension produced by the confined expansion of brick. Failure depends upon the tensile strength of the mortar. In mortar with lower strength than the brick unit, failure is produced by spalling associated with multiple cracks, which results in a loss of load bearing area. For mortar with a higher strength than the brick, cracking occurs when the level of compression is a significant proportion of the compressive strength of the brick material. Localized crushing resulting from localization of strain in a small region at the brick-mortar interface is produced at axial stress close to the unconfined compressive strength of the brick material. Failure in the case of high strength mortar is a result of the localized crushing and the resulting global instability.

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IITH Creators:
IITH CreatorsORCiD
K V L, Subramaniamhttp://orcid.org/0000-0002-5995-0911
Item Type: Article
Uncontrolled Keywords: Masonry; Dilatancy; Compression; Failure; Mortar; Brick; Soft
Subjects: Civil Engineering > Construction & Building Technology
Civil Engineering > Soil Structure Interaction
Divisions: Department of Civil Engineering
Depositing User: Team Library
Date Deposited: 04 Nov 2016 06:42
Last Modified: 05 Jul 2017 09:11
URI: http://raiith.iith.ac.in/id/eprint/2857
Publisher URL: https://doi.org/10.1617/s11527-016-0926-1
OA policy: http://www.sherpa.ac.uk/romeo/issn/1359-5997/
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