Modeling Structural Insulated Panel (SIP) Flexural Creep Deflection
Publication: Journal of Structural Engineering
Volume 123, Issue 12
Abstract
Creep testing of oriented strand board/foam structural insulated panels (SIPs) was conducted to measure the midspan creep deflections of SIP beams loaded in quarter point and to test the effects of SIP thickness, load duration, as well as core shear stress. A relative deflection relationship was generated for both the expanded polystyrene (EPS) and urethane SIPs from the faw creep deflection data that had been screened based on previously determined limits of viscoelastic linearity. A five element, four element, and three element viscoelastic model along with a power model were all used in the validation procedure to predict the three month relative creep deflection. EPS SIPs were tested at the 2/3 stress level for six months to determine the model capability in predicting relative deflections beyond the experimental time span. Both the five element and the power model were recommended for predicting the EPS and urethane SIP relative deflections for the three month load duration.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 123 • Issue 12 • December 1997
Pages: 1658 - 1665
Copyright
Copyright © 1997 American Society of Civil Engineers.
History
Published online: Dec 1, 1997
Published in print: Dec 1997
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