首页|OPTIMAL SURFACE IN PLAN FOR HOLLOW CIRCULAR FOOTINGS ASSUMING THAT THE CONTACT SURFACE WITH SOIL WORKS PARTIALLY UNDER COMPRESSION
OPTIMAL SURFACE IN PLAN FOR HOLLOW CIRCULAR FOOTINGS ASSUMING THAT THE CONTACT SURFACE WITH SOIL WORKS PARTIALLY UNDER COMPRESSION
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This paper presents a model to determine the optimal surface of a hollow circular footing or annular strip footing (the width and the position where pressure is zero, since the radius is subject to the conditions of the superstructure), assuming that the soil is elastic, the soil pressure distribution is linear and the surface in contact with the soil works partially in compression. Some authors show the optimal surface of solid circular footings taking it into account that the area in contact with the soil works partially under compression, and other present annular strip footings or hollow circular footings assuming uniform soil pressure. The formulation is developed by integration to determine the axial load "P" and a resultant moment "Mr " from the moments "M_x " and "M_y ". Six numerical examples are presented to determine the soil contact area for hollow circular footings under an axial load and a resultant moment. A comparison is also made with the results of other authors and the results show that using the proposed model savings of up to 43.75% can be achieved.
Instituto de Investigaciones Multidisciplinaria Facultad de Contaduria y Administration Universidad Autonoma de Coahuila, Unidad Torreon Blvd. Revolution 151 Ote. CP 27000, Torreon, Coahuila, Mexico
Centro de Estudios Tecnologicos Industrials y de Servicios No. 59 Calle Mayela S/N Col. Ampliation Margaritas. CP 27130, Torreon, Coahuila, Mexico
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