Modeling Structural Insulated Panel (SIP) Flexural Creep Deflection

Taylor, Steven B.; Manbeck, H. B.; Janowiak, John J.; Hiltunen, Dennis R.

doi:10.1061/(asce)0733-9445(1997)123:12(1658)

Cited by 18 publications

(16 citation statements)

References 5 publications

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“…Power law formulations have been successfully used by several authors to describe the creep behaviour of polymeric materials, including foams [6][7][8][9] and FRP profiles. [26][27][28][29][30][31] Equation (1) shows the general expression for Findley's power law formulation, where " is the total strain in a material, is the applied stress, t is the time elapsed after load application, m is the creep amplitude, n is the time exponent, " 0 e is the reference instantaneous strain, e is reference stress level associated with " 0 e , m 0 is the reference transient creep amplitude and m is the reference stress level associated with m 0 :…”

Section: Findley's Power Law General Formulationmentioning

confidence: 99%

“…There are a only few studies in the literature reporting experimental investigations about the creep behaviour of sandwich structures, namely those of Huang and Gibson, 6,7 Taylor et al, 8 Shenoi et al 9 and Chen et al 10 Huang and Gibson 6 studied the bending creep behaviour of sandwich panels made of rigid polyurethane (PU) foam cores and aluminium faces. The authors proposed a semi-empirical model, based on a power law for creep development, to simulate the time-dependent behaviour of sandwich beams with viscoelastic cores.…”

Section: Introductionmentioning

confidence: 99%

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Creep behaviour of sandwich panels with rigid polyurethane foam core and glass-fibre reinforced polymer faces: Experimental tests and analytical modelling

Garrido

Correia

Branco

et al. 2013

Journal of Composite Materials

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This paper presents experimental and analytical investigations about the creep behaviour of sandwich panels comprising glass-fibre reinforced polymer faces and rigid polyurethane foam core for civil engineering applications. A full-scale sandwich panel was tested in bending for a period of 3600 h, in a simply supported configuration, subjected to a uniformly distributed load corresponding to 20% of the panel's flexural strength. Additionally, specimens of polyurethane foam core were tested in shear for a period of 1200 h, for three different load levels corresponding to 10%, 20% and 30% of the foam's shear strength. Experimental results were fitted using Findley's power law formulation. Creep coefficients, shear modulus reduction factors and time-dependent shear moduli were obtained for the polyurethane foam in shear. A composed creep model is proposed to simulate the sandwich panel's long-term creep deformations by considering the individual viscoelastic contributions from (1) the core material in shear and (2) the glass-fibre reinforced polymer faces in tension/compression. The composed creep model predictions adequately reproduced the full-scale panel's experimental results. In addition, a good agreement was found between the composed creep model predictions and the extrapolation of the power law fitting obtained from the full-scale panel test, for a 50-year period.

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Section: Findley's Power Law General Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Creep behaviour of sandwich panels with rigid polyurethane foam core and glass-fibre reinforced polymer faces: Experimental tests and analytical modelling

Garrido

Correia

Branco

et al. 2013

Journal of Composite Materials

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“…Many of the studies in current literature discuss the structural elements of the panels (Mousa, 2010, Taylor, 1997, Sennah, 2008. There are structural concerns associated with the use of SIPs, namely potential creep and debonding of the OSB on the panels themselves.…”

Section: Current and Past Researchmentioning

confidence: 99%

Evaluating the Potential to Achieve Passive House with Structural Insulated Panels using a Case Study in Toronto, Canada

Brazukas¹

2021

Preprint

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A home in Toronto recently re-constructed with Structural Insulated Panels (SIPs) was analyzed and an energy simulation using HOT2000 and PHPP was created based on the current state of the house. The simulations were used to determine compliance with the Canadian R-2000 standard and the Passive House standard. The building met the R-2000 standard in its current state. Further analysis was required in order to determine design changes that may be made to achieve Passive House. This research determined the applicability of SIPs to achieve these standards in the context of the subject home. Through the redesign of the building enclosure assemblies and the elimination of the thermal bridges through the envelope, the Passive House standard was achieved using a double wall stud SIP. A number of design changes were also required including better performing windows and HRV as well as the addition of glazing to the south façade and removal of glazing on other facades. These design changes were then applied to HOT2000 and it was found that the Passive House building achieved an energy savings of 60% compared to the R-2000 standard baseline.

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“…The plateau observed is indicative of the temperature at which shrinkage is triggered at the EPS. By means of observation of the final condition of the samples seen in Figure 3.3, it is determined that no shrinkage happened at locations of 121mm or greater 2 . Overall, no shrinkage took place at locations where the measured temperature did not exceed the 91°C to 98°C threshold.…”

Section: Test Setupmentioning

confidence: 99%

“…Oriented Strand Board (OSB) is more commonly used as facings [2], steel, plasterboard and composites like Glass Fibre Reinforced Polymers (GFRP) can also be applied to the same purpose.…”

Section: Introductionmentioning

confidence: 99%

Fire and structural performance of structural insulated panels

Cuevas¹

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This thesis characterizes the behaviour of Structural Insulated Panels (SIPs) under fire conditions. The composite construction material addressed here has a sandwich configuration; the core is made from Expanded Polystyrene (EPS) and the face sheets are Magnesium Oxide (MGO) boards. It is a modular lightweight system, prefabricated to meet requirements of the end-user. While the quantitative results shown herein are relevant to the specific product studied, the general analysis and observations are applicable to any multi-layer composite panel. There is vast information that explains the structural behaviour of SIPs at ambient conditions. However, the number of studies on fire performance is less extensive. Previous research has focused on performing standard tests aimed at determining the fire resistance (to fulfil regulatory requirements) for specific products or on measuring flammability parameters to assess the impact they may have upon compartment fire dynamics. Moreover, common design for fire safety is done only from a prescriptive point of view, where the fire resistance rating is the only basis for design. This perspective is ill conceived, since it relies fully on the capacity of the face sheets (e.g. MGO) to provide encapsulation to a combustible core (e.g. EPS). Encapsulation is a strong function of combined thermal and mechanical behaviour; hence, the combined action of temperature and load needs attention. Nevertheless, this combined action of mechanical loading and increasing temperature rarely has been investigated, and therefore the performance of SIPs during or after fire is not fully understood. Fire performance and structural behaviour are two mutually affecting processes. Thermal degradation of load bearing materials causes a reduction in the capacity of the system to carry loads and provide a sound structural performance. In a similar manner, a compromised mechanical integrity diminishes its fire performance because the capacity to encapsulate the combustible core is reduced. To explain such complex interaction, this research study uses a combination of structural mechanics principles, heat transfer modelling and experiments to develop a composite analysis that describes the thermomechanical behaviour of the panels. SIP's failure mechanisms at ambient temperature were determined by conducting experiments on full-scale samples as well as modified specimens. These were compared with the observations of similar tests conducted on samples tested under residual conditions (i.e. heated and cooled down prior to testing). By performing independent experimentation on each comprising material (EPS, MGO) viii Financial support This research was partially funded by the linkage project LP13 "The design and construction of quality, sustainable and affordable pre-made housing in Australia-Optimisation and Interaction",

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Modeling Structural Insulated Panel (SIP) Flexural Creep Deflection

Cited by 18 publications

References 5 publications

Creep behaviour of sandwich panels with rigid polyurethane foam core and glass-fibre reinforced polymer faces: Experimental tests and analytical modelling

Creep behaviour of sandwich panels with rigid polyurethane foam core and glass-fibre reinforced polymer faces: Experimental tests and analytical modelling

Evaluating the Potential to Achieve Passive House with Structural Insulated Panels using a Case Study in Toronto, Canada

Fire and structural performance of structural insulated panels

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