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SILVA, E.L. (1998) Analysis of structural models to determine limits forces in spread footings. 129p. Dissertação (mestrado) Escola de Engenharia de São Carlos. Universidade de São Paulo. This paper discusses the changes contained in the most recent versions of Brazilian and international codes on reinforced concrete design in regard to footing design criteria. The paper sets forth the essential concepts and recommendations for the design and construction of spread footings, such as the most frequently used type of shallow foundation. The author engages in a discussion of the criteria presented in the CEB/1970, NBR 6118/1982, CEB MC-90, ACI 318/1995, EC-2/92, e text which serve as the basis for the revised version of the Brazilian code NBR 6118/1997 , as well as of some design models that are not yet normalized. Since some of these codes do not take into consideration the ultimate limit state in spread footing design, some criteria that are applicable to slabs were adapted for this study. Several examples are analysed to facilitate understanding of the concepts and recommendations outlined in the codes. One of these examples, in which a comparison is made of the results of different codes, shows that the limit values of shear force drawn up in the CEB Bulletin d’Information n.73[1970] are low.

Análise dos modelos estruturais para determinação dos esforços resistentes em sapatas isoladas