Abstract

In the light of the writers' measurements on load-bearing behavior of variedly dimensioned reinforced concrete slab models with free edges, the modified Johansen method with the effect of concrete tensile strength taken into account and Park's method are examined herein respecting their validity in such cases of two-way slabs. In consequence, that of the former method, including its relative accuracy and feasible extent of application, is shown to be substantially limited because in the present cases the general mode of failure is more dominated by torsion and/or shear types than in the case of many otherwise supported slab systems subject to failures of generally bending types.

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