Laminated Glass Curtain Walls and Laminated Glass Lites Subjected to Low-Level Blast Loading
- 1 March 2008
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Structural Engineering
- Vol. 134 (3), 466-477
- https://doi.org/10.1061/(asce)0733-9445(2008)134:3(466)
Abstract
Linear elastic and nonlinear elastic analytical investigations are reported for a nearly conventional, laminated glass curtain wall with split screw spline mullions subjected to low-level blast loading. Responses (dynamic stresses, deflections, and accelerations) of the rectangular glass lites within the curtain wall are compared to those of identical glass lites that are (1) simply supported and (2) supported on structural silicone sealant beads along all four edges. The elastic finite element model of the curtain wall was calibrated to small-amplitude static and dynamic experimental results in a previous effort, where effective mullion moments of inertia, connection stiffnesses, and system damping ratios were determined. This calibrated curtain wall model and the two other glass lite models were subjected to uniform blast pressures represented in time by a triangular pulse. These comparisons are made to illustrate the reduction of principal stresses of the glass lites due to the flexibility of the structural silicone bead and, more significantly, the global flexibility of the curtain wall system. Changes in modal frequencies and the appearance or disappearance of significant response modes due to the different boundary conditions of the glass lites are illustrated. For the cases studied, maximum principal stresses were typically halved when the flexibility of the curtain wall members supporting the lite was considered. This paper also shows that: (1) the dynamic behavior of a given glass lite varies dramatically with support conditions as shown in corroborating modal and transient analyses and (2) geometric nonlinearities typically reduce dynamic responses only slightly when compared to linear geometry for the low-amplitude loads considered in this study.Keywords
This publication has 17 references indexed in Scilit:
- Fracture mechanics of laminated glass subjected to blast loadingTheoretical and Applied Fracture Mechanics, 2005
- Laminated glass plates: revealing of nonlinear behaviorComputers & Structures, 2003
- Analysis of Glass/Polyvinyl Butyral Laminates Subjected to Uniform PressureJournal of Engineering Mechanics, 1999
- Behavior and Strength of Laminated GlassJournal of Engineering Mechanics, 1998
- Analysis of structural glazing systemsComputers & Structures, 1997
- Dynamic racking tests of curtain wall glass elements with in‐plane and out‐of‐plane motionsEarthquake Engineering & Structural Dynamics, 1995
- Stresses in Layered Glass Units and Monolithic Glass PlatesJournal of Structural Engineering, 1987
- Load Duration and Interlayer Thickness Effects on Laminated GlassJournal of Structural Engineering, 1986
- Glass Failure Prediction ModelJournal of Structural Engineering, 1984
- Iterative Analysis of Nonlinear Glass PlatesJournal of Structural Engineering, 1983