Flexural Strength of Modified Square Footings

by Madanai S.S. Nathan, Executive; Canadian Met-Chem Consultants Ltd., Kudremukh Office, India,
Balagolam V. Ranganatham, Prof.; Dept. of Civ. Engrg., Indian Inst. of Sci., Bangalore, India,

Serial Information: Journal of the Structural Division, 1978, Vol. 104, Issue 3, Pg. 551-565

Document Type: Journal Paper


The ultimate flexural strength behavior of isolated square tapered and beam-slab reinforced footings are presented. Yield line solutions are developed for generalized contact pressure distributions and the influence of taper, beam size, fillet size, negative moment capacity, and contact pressure distribution on the collapse load is brought out. In beam-slab footings the optimum relative beam capacity required to make the beam rigid is indicated. Results of experimental investigations on footings resting on sand reveal that tapered (with isotropic as well as with alternative reinforcement patterns) and beam-slab footings exhibit superior structural behavior in terms of normalized first crack load, collapse load, relative rigidity, relative efficiency, and failure mechanism.

Subject Headings: Beams | Flexural strength | Failure loads | Pressure distribution | Soil stabilization | Slabs | Moment distribution | Structural failures

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