- Title
- Impact of Corroded Galvanised Wall Ties on The Structural Integrity of Masonry Veneer Walls
- Creator
- Terry, L.; Gillogly, G.; Chaves, I. A.; Masia, M.; Petersen, R.
- Relation
- 26th Australasian Conference on Mechanics of Structures and Materials (ACMSM26). Proceedings of 26th Australasian Conference on Mechanics of Structures and Materials (ACMSM26) (Auckland, NZ 3-6 December, 2023) p. 65-76
- Publisher Link
- http://dx.doi.org/10.1007/978-981-97-3397-2_7
- Publisher
- ACMSM26
- Resource Type
- conference paper
- Date
- 2024
- Description
- An important structural component of a masonry veneer wall system is the metal wall tie, providing connection and stabilisation of the outer masonry leaf to the internal load bearing frame. In Australia, a masonry veneer wall is conventionally constructed of a timber frame and side-fixing galvanised tie with corrugated sheet embedded in the mortar bed joints of the masonry leaf. Existing literature suggests the predominant failure mode of a brick veneer tie in tension is from nail pull-out at the timber. However, as wall ties are subject to long-term corrosion, failure may occur through fracturing of the wall tie, causing severe damage to masonry veneer walls during extreme wind or earthquake events. This paper outlines the impact of corrosion on the structural integrity of the wall tie in a masonry veneer wall, in turn justifying how deterioration of the tie contributes to their failure under tension. To evaluate the effect of corrosion on the structural integrity of the veneer wall system, accelerated corrosion of a Z600 galvanized wall tie was completed through electrolysis, before fixing the tie into the connection subassembly: comprising brick couplet, galvanised wall tie, and timber. Structural capacity testing detailed the mechanisms of failure for the connection subassembly, highlighting the percentage range of mass-loss that led to failure by fracture of the tie rather than nail pull-out from the timber frame. Thus, the findings of this paper indicates that tensile strength deterioration of galvanised wall ties is a function of the decreasing mass. These findings have practical implications through building assessment and monitoring of existing masonry buildings.
- Subject
- galvanized wall tie; masonry veneer; corrosion; structural integrity
- Identifier
- http://hdl.handle.net/1959.13/1511072
- Identifier
- uon:56463
- Language
- eng
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