Deflections and Stresses in Rectangular, Circular and Elliptical Insulating Glass Units

Area of Science:

• Construction Engineering
• Materials Science
• Structural Analysis

Background:

• Insulating glass units (IGUs) are crucial building components susceptible to climatic loads like pressure and wind.
• Existing models primarily focus on rectangular IGUs, yet modern architecture increasingly uses diverse shapes.
• Understanding the structural behavior of non-rectangular IGUs is vital for advanced architectural designs.

Purpose of the Study:

• To develop analytical and numerical models for circular and elliptical IGUs.
• To compare the deflection and stress in these non-rectangular IGUs against traditional square and rectangular units.
• To analyze the impact of atmospheric pressure and wind loads on IGU performance.

Main Methods:

• Development of analytical and numerical calculation models for circular and elliptical IGUs.
• Comparison of deflection and stress values between rectilinear (square/rectangular) and curvilinear (circular/elliptical) IGUs.
• Presentation of calculation examples for various IGU dimensions and load conditions (pressure changes, wind).

Main Results:

• Single circular glass panes exhibit up to 4.2% greater deflection and 13% higher stress than square units of equivalent dimensions.
• Symmetrically loaded double-glazed circular IGUs show 8-9% less deflection than square units, with nearly identical stress levels.
• Elliptical IGUs required numerical modeling due to the complexity of formulating deflection functions.

Conclusions:

• The shape of insulating glass units significantly influences their structural response to climatic loads.
• Circular IGUs offer potential benefits in reduced deflection for double-glazed configurations.
• The findings provide valuable data for architects and engineers designing with non-standard IGU shapes.