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Apr 26, 2013
Racking Performance Analysis of Four-Sided Structural Sealant Glazing Curtain Wall Systems Through Video Capture Technique
Authors: Nicholas C. Simmons [email protected] and Ali M. Memari [email protected]Author Affiliations
Publication: AEI 2013: Building Solutions for Architectural Engineering
Abstract
Full-scale "unitized", four-sided, structural sealant glazing (4SSG) curtain wall system mockups featuring a re-entrant corner were subjected to cyclic racking displacements in accordance with the American Architectural Manufacturers Association AAMA 501.6 protocol to determine serviceability and ultimate behavior responses. Glass fallout, sealant adhesive or cohesive failure, and glass cracking were identified as limit states and corresponding drift levels were determined. This paper describes the details of the techniques developed and used for analysis and shows example applications of the method to mockups with racking test results available. The video analysis measured the changes in distances between glass and frame, which was then used to calculate an effective shear strain of the structural silicone by a linear and quadratic method. An effective shear strain of 173% and 130% was calculated from a linear method and a quadratic method for a structural silicone when failure initiated. Test data from the manufacturer indicates the ultimate shear strain of the structural silicone occurs around 200%.
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© 2013 American Society of Civil Engineers.
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Published online: Apr 26, 2013
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Simpson, Gumpertz & Heger, 41 Seyon Street, Building 1, Suite 500, Waltham, MA 02453. E-mail: [email protected]
Department of Architectural Engineering and Department of Civil and Environmental Engineering, The Pennsylvania State University, 222 Sackett Building, University Park, PA 16802. E-mail: [email protected]
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