Diseño óptimo de cimentaciones superficiales para estructuras de acero ligeras

Abstract

This degree work is based on the calculation and structural evaluation referred to the design of different types of surface foundations for two types of typical light steel structures of the national practice, being these: an industrial shed and a self-supported triangular transmission tower of 36 m of height. For this purpose, the calculation of the main loads affecting this type of structures was carried out, using the equations established in the Ecuadorian construction regulations as well as in the Structural Standards for Steel Antenna Towers and Antenna Supporting Structures, the latter being an international code containing the minimum parameters for antenna design, Consequently, once these loads were determined, using the SAP2000 computational package, which allows simulating the behavior of the structures, each one of them was dimensioned through an iterative process of entering different metallic profiles, until complying with the basic parameters for dimensioning. Subsequently, the service loads and factored loads were obtained from the SAP2000 finite element program, for which, in addition, the allowable capacity curves for soil profile type C and E were developed using the semi-empirical equations proposed by Bowles and Meyerhof, referring to the aforementioned structures; consequently, the design of: square isolated footing, foundation beam and foundation slab was carried out. Once the design stage was completed, by means of the technical and economic analysis based on the unit price study, the optimum type of foundation was determined from the engineering point of view, saving the economy used for the construction of the infrastructure of this structural typology.