Análisis de vibraciones por acción de caminado en edificaciones de estructura metálica empleando pórticos resistentes a momento

Abstract

In this academic paper, twenty structural models were analyzed, using the ETABS-2018 computational package, which met the seismic resistant parameters, corresponding to essential structures, established in the NEC-SE-DS, 2015 standard, of which ten presented problems of vibration due to walking effects, while the other ones provided a solution to it. This problem depends on the proposal of greater lengths between spans, weight reduction through the use of steel structures and the absence of control in the vibration parameters. Regarding the analysis and evaluation of story vibrations, it was possible to develop a model by means of the ETABS 2018 software, applying three analytical methods: M. Murray, M. Simplificado SCI and M. Hivoss; of the exposed methods, the one developed with a more meticulous process, without estimating data, or values in tabulated graphs, was more efficient. Due to this particularity, the research was focused on the addition of elements that mitigate vibrations in mezzanines, whose purpose is to improve the comfort conditions for the users. This is the case of torsional bracings, whose main function is to act as diaphragms, thus improving the lateral and torsional instability of beams. These components reduced vibrations on the roof by around 35,29 % and 24,19 % on the mezzanine; in addition, they provided a benefit to the overall performance of the structure.