... sapproach, which was basically similar to thatof Wood, was an extension of yield-line theory based on idealized rigid-plastic assumptions and - took account of the membrane effect byconsidering the enhancedbending resistance. Although the slabs tested by the Author, Wood, and Powell covered a wide range...

... the compressive membrane stresses which are induced by the lateral restraint and usesa rigid-plastic strip approximation. On the basis of an empirical value for the deflexion at ultimate load the theory is shown to give a good indication of the ultimate loads obtained from tests on thirty-five slabs with various...