Improved Gap Performance of Corrugated Ties in Generalized Anchored Masonry Veneer

Date of Award

8-1-2024

Degree Name

M.S. in Civil Engineering

Department

Department of Civil and Environmental Engineering and Engineering Mechanics

Advisor/Chair

Elias Toubia

Abstract

Transfer of external, lateral loads from a masonry veneer to the load supporting wythe requires application of adhered or anchored veneer. In anchored veneer, a hollow region exists between the exterior veneer and interior wythe; spanned by flexible or adjustable mechanical anchors. Improvements in the allowable void space provide benefits to available insulating methodologies and to novel architectural design. The implementation of corrugated ties in anchored masonry veneer in current generation NCMA and TMS codes provides only 1-inch of allowable void space; more limited than any other approved anchorage method. This disparity bore two queries: could the existing corrugated tie product resist specified loads at extended void distances, and could a modified corrugated tie significantly improve the void gap performance? This evaluation employed experimental analysis to tune a computational model for evaluation of the proposed queries. Eighteen theoretical variables were examined with nine constrained by existing code or experimental findings and nine released for analysis and manipulation. Existing corrugated ties were determined to be inadequate for expanded void gaps due to racking of the veneer. Tie thickness expansion was identified as a plausible means of significantly improving allowable gap performance with valid configurations achieving 9-inches of allowable gap.

Keywords

Masonry; "Masonry Veneer; Anchored Masonry Veneer; Tie Gap; Corrugated Tie; Out-of-Plane Lateral Load

Rights Statement

Copyright © 2024, author.

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