A finite element model for pierced-fixed, corrugated metal roof cladding subject to uplift wind loads
Conference Publication ResearchOnline@JCUAbstract
The roof of a low-rise building is subjected to large fluctuating pressures during windstorms, and is generally the most vulnerable component. Furthermore, metal roof components such as cladding, clips and battens can be susceptible to fatigue failure under these fluctuating wind loads. Recent cyclone damage investigations have shown that cladding that has been tested, designed and installed correctly performed well, highlighting the benefits of standardised wind load testing criteria. The performance of metal roof cladding can be assessed by analysing its response to simulated wind loads. Loads can be applied as either static or fluctuating loads on representative cladding specimens. These tests, combined with numerical models of roofing systems, provide means of varying a range of critical parameters, enabling innovative, efficient and economic use of materials. This paper presents a numerical and experimental analysis of pierced-fixed, corrugated metal roof cladding subject to an uplift pressure, and gives a detailed description of the development and validation of a finite element model. Close agreement between the numerical and experimental results for the displacements, stresses and fastener reaction were found, suggesting that the model can successfully simulate the behaviour of cladding under a static load for both the elastic and elastoplastic response. In addition, the numerical model effectively describes the response of the cladding including the local diamond-shaped dimpling of the fastened crests, the snap-through buckling of the cladding and the permanent local deformation following the unloading. The potential for developing the model for fluctuating wind loads is also discussed.
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Australasian Structural Engineering Conference 2012 (ASEC12)
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978-085825-871-4
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8
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Perth, WA, Australia
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Engineers Australia
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Barton, ACT, Australia
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