Failure modes and trend curves for load capacity and stiffness of OSB panels subjected to concentrated load

摘要

The determination of the concentrated load performance of floor panels from concentrated load tests is useful in their load capacity and stiffness ratings by floor-panel manufacturers. Concentrated load tests of 18-mm thick one-way spanning simply supported oriented strand board (OSB) panels with ratios of span to thickness of 16.7, 25.0 and 33.3 have been carried out in order to characterise the trends in the stiffness, load capacity and type of failure of the panels. The panels exhibited punching shear-type failures. Linear equations have been fitted to the graphs of stiffness versus ratio of thickness to span squared and to the load capacity versus ratio of thickness to span. Linear relationships between stiffness versus ratio of thickness to span squared and load capacity versus ratio of thickness to span are predicted for continuous and fixed-edge panels. In the light of the extensive use of computerised design programmes and the preference for formulae in new design Standards and Codes, the determination and publication of these concentrated load capacity and stiffness formulae for floor panels should be invaluable to designers.