Selection of best models for load-carrying capacity of square column foundations: Fid-Bau Portal

Selection of best models for load-carrying capacity of square column foundations

Giuseppe, Campione

Highlights • A simplified calculus model for the prediction of the load carrying capacity of prismatic and shaped RC column footing with square cross-section. • Several subgrade contacts pressures distributions for column footings. • Proposal and the choice of the best model (strut and tie or cantilever beam/two ways slab model) to predict in a safe way the load carrying capacity of single column footing including the variation in the type of soil. • Available experimental data were utilised to verify the model in comparison with existing models. • Simple analytical expressions were derived for a preliminary design of slender and deep column footing.

Abstract In this paper, a simplified strut-and-tie model for the prediction of the load-carrying capacity of a prismatic RC column foundation with a square cross-section is presented. Several subgrade contact pressure distributions for column foundations were considered. The flexibility of the foundation was also considered in the use of a strut-and-tie model. A detailed background of existing models for prediction of the load-carrying capacity of a flexible and rigid foundation was presented. The aim of the paper was the choice of the best model (strut-and-tie or cantilever beam/two-way slab model) to safely predict the load-carrying capacity of a single column foundation including the variation in the type of soil. Available experimental data were utilized to verify the model in comparison with existing models.