Load-Bearing Capacity of Longitudinally Stiffened Thin-Walled Sheeting on an Elastic Foundation Probided by Insulation Materials

Misiek, Thomas; Frank, Friederike; Ummenhofer, T

doi:10.3850/978-981-08-9247-0_rp088-icsas11

Cited by 2 publications

(1 citation statement)

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“…This method is modified to consider not only the stiffness originating from the distortion of the cross-section, but the additional stiffness provided by the encasing material as well. A similar procedure was used by Misiek et al in [9] for intermediate stiffeners of sandwich panels and was validated in a relatively small range of foundation elastic modulus. For global buckling it can be assumed based on the experimental results that no torsional buckling shapes can occur (i.e.…”

Section: Principles Of Design Methodsmentioning

confidence: 99%

07.18: Cold‐formed C‐sections encased in ultra‐lightweight concrete: Development of a Eurocode‐based design method

Hegyi¹,

Dunai²

2017

ce papers

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A new direction of development in the field of light-gauge building systems is when the load bearing elements made of cold-formed steel (CFS) sections are encased in an ultra-lightweight material. This material, apart from heat insulation and fire protection effects, can provide bracing effect to the CFS elements, too, therefore can increase the resistance against stability failures. Such lightweight material is the polystyrene aggregate concrete (PAC). Based on previous experimental results this paper develops design method for calculating local, distortional and global resistance of PAC-encased CFS C-sections. The proposed design method is based on the specifications of Eurocode, therefore applies the effective width method for calculating local buckling. The proposed procedure considers the effect of continuous bracing of PAC by replacing it with an elastic halfspace, similar to sandwich beam theory. Close form equations are derived to be able to calculate the effective width of plate elements by hand calculation. Distortional buckling is treated as buckling of an equivalent beam resting on elastic foundation, considering the additional stiffness provided by the infill material. The global flexural buckling failure modes of columns are dealt with separately using different mechanical models. Each calculation procedure was compared to existing experimental results in order to evaluate them.

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Section: Principles Of Design Methodsmentioning

confidence: 99%