Comparación técnica y económica de un edificio de acero diseñado con el sistema dual y usando diferentes tipos de columnas : Evaluación técnica y económica de un edificio de acero diseñado con el sistema dual y usando columnas de sección rectangular rellenas de hormigón.

Abstract

The present work addresses the preliminary design and structural design of a steel building with a dual system of Special Concentrically Braced Frames (SCBF) and steel columns filled with concrete. The LRFD (Load and Resistance Factor Design) method is followed for limit state design, considering load combinations and resistance reduction factors. The project includes a detailed analysis of the materials used, architectural and structural configuration, as well as gravitational and seismic loads. A static analysis and a spectral dynamic analysis have been carried out on a computational model of the structure to verify its regularity and seismic resistance, adjusting the dynamic base shear and controlling the vibration modes and drifts. In the economic analysis, the direct costs associated with the construction of the building are considered. This includes a breakdown of the volumes of work and the necessary materials, such as concrete and structural steel. Additionally, labor and equipment costs are considered, providing a clear view of the investment required for the construction of the building's structure. The results show the demand-capacity ratio of the structural elements, the total cost of the building, and comparisons with other types of columns, highlighting the efficiency of filled columns compared to hollow and I-type columns. It is concluded that the proposed design is feasible from both a structural and economic point of view, recommending the application of these methods for future similar projects.