Study on load distribution of triple glazed insulating glass units under uniform load
Triple-glazed insulating glass units(TIGUs)have been widely used in fenestration and curtain wall engineering.However,relevant domestic and foreign specifications still lack streamlined and effective design methods.To investigate the load sharing of triple-glazed insulating glass under uniform load,four specimens were used in the loading tests.Based on the Ideal Gas Law and ANSYS deflection field analysis,a high-precision finite element(FE)model suitable for TIGU was built,showing excellent agreement with experimental results.Through conceptual analysis and FE parametric analysis,the quantitative relationship between the load sharing ratios of each pane and the thicknesses of the inner and outer airspace was revealed.The study demonstrates that increasing the inner airspace thickness leads to a nearly linear increase in load sharing ratios of the outer and middle panes,while the middle and inner panes decreases with the thickness of the outer airspace.When both inner and outer airspace thicknesses increase equally,the load sharing ratio of the outer pane increases significantly,while the inner pane shares a substantially decreased load,with the middle pane's load reduction being more gradual.Finally,considering panel dimensions,a formula for calculating the airspace coefficient suitable for load distribution in TIGU was proposed,which takes into account the aspect ratio and area.The suitability and effectiveness of the fitting formula are highly favorable,making it valuable for the revision of relevant standards.
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