Análisis estructural empleando vigas banda en un edificio de baja altura con el Código ACI 318-19 y la norma NEC 15, ubicado en la parroquia Cotocollao, barrio 23 de Junio de Pichincha, provincia Pichincha, 2022 – 2023

Abstract

The construction of systems with band beams is commonly used in Ecuador, but further research is needed to determine a realistic behavior of band beams. Structural engineers make designs based on criteria that are not specific to these structures, such as a reduction factor in the design spectrum for ductile systems, resulting in lower lateral loads. They also tend to overlook the punching shear design, which often leads to failure of these structures under seismic loading. It is important to note that the use of band beams is not accepted in high-risk seismic zones, but in Ecuador, construction with this type of system continues due to the current Ecuadorian Construction Regulations allowing such designs. The ACI-318 code mentions various criteria for the design of these beams in its different updates, through a proper analysis of the slab-column connection to achieve satisfactory performance of the band beam system during an earthquake. It is necessary to highlight that the majority of structural engineers do not consider the calculation and design criteria specified by the ACI, resulting in a deficient design of the band beam system that could lead to disasters like the one witnessed in the Pedernales earthquake. Therefore, it should be mandatory to review the ACI criteria for band beams in order to obtain optimal results for these structural elements. The aim of this technical project is to conduct a structural analysis of band beams using the current design regulations in Ecuador, NEC-15, and the latest update of the ACI318-19 code, starting with a preliminary design of the structural elements of this system and analyzing the obtained results to achieve an ideal configuration of the band beam that can be effectively applied in low-rise buildings