- Author
- Pantelides, C. P. | Horst, A. D. | Shankland, R. B., Jr. | Minor, J. E.
- Title
- Behavior of Laminated and Filmed Glass in Severe Windstorm Environments. Final Report. January 1, 1990-December 21, 1990.
- Coporate
- University of Missouri-Rolla, MO
- Sponsor
- Monsnato Chemical Co., St. Louis, MO
- Report
- Final Report, April 1991, 67 p.
- Distribution
- Available from National Technical Information Service
- Keywords
- glass | laminates | pressure | glazing materials | silicones | wind effects
- Identifiers
- severe windstorm; cyclic pressures; wind pressures; windborne missles; structural silicone glazing
- Abstract
- This research addresses the behavior of heat strengthened laminated glass under conditions which represent a severe windstorm. Specimens laminated with two different interlayers were examined. The interlayers were polyvinyl butyral (PVB) 0.060 in. in thickness and a sandwich combination of PVB and polyethylene terephthalate (PET) 0.033 in. in thickness. Glass specimens were tested in three glazing configurations, one dry glazed and two with a silicone anchor bead. The glass specimens were properly glazed into aluminum frames. The frames were then mounted onto a testing table creating an airtight chamber. This chamber enabled pressurization and evacuation of air. Prior to a load application, the specimen was impacted at 190 locations with a 2.03 gm missile propelled from a compressed air cannon. One of three missile velocities was employed in each test. Finally, the specimen was subjected to a spectrum of cyclic pressure and partial vacuum representing wind pressures experienced by a window during a severe four-hour windstrom. Black and white print and color slide photography and video were used to record specimen behavior. Test results indicated that specimens glazed with a 3/4 in. anchor bead performed much better than specimens glazed with a 3/8 in anchor bead. Specimens with the PVB/PET interlayer glazed with an anchor bead performed much better than similarly glazed specimens with the PVB interlayer.