Modificación de mesa vibratoria bidireccional para laboratorios de ingeniería en Construcciones Civiles sede Tecnológica

Abstract

An earthquake simulation table is used in structural dynamic analysis to reproduce the forces involved in a real earthquake in the laboratory, in other words, any structure can be subject to dynamic loads, and dynamic analysis is used to obtain the response of a structure to any dynamic action (earthquake, wind, explosions, vibrations of mechanical equipment, etc.) in terms of displacements, velocities, accelerations, among other parameters, or some other type of excitation such as an earthquake. Currently in the STRUCTURAL DYNAMICS laboratories of the Francisco José de Caldas University, in its technological headquarters, there is a simulation table which although it works as a table that reproduces movements to study the behavior of structures under external forces, it does not have the necessary scope for a more complete study of structures, since said table only reproduces constant movements, which means a problem limiting the study of structures, knowing that when studying real earthquakes that have occurred throughout history, it has never been obtained that said forces or displacements are harmonic movements, but on the contrary, it is obtained that the forces that act on the structures are irregular movements. For the above, an alternative solution is presented to the structural dynamics laboratory technicians, in which data was taken from real seismic accelerograms that have occurred throughout history, obtained from geological systems, to then process said data according to the limitations and parameters of a stepper motor, capable of moving the table and with it the structure or structures that are desired to be exposed to external loads in order to study their behavior under said forces, giving us the possibility of reproducing the data of an accelerogram on the table in such a way as to simulate a non-harmonic movement on said table. After the development of the project, it is possible to obtain a table that reproduces irregular movements, which is capable of exerting forces on the structures that are desired to be intervened by external loads, offering a broader range of study to the engineers who carry out these studies in the structural dynamics laboratories, leaving open the possibility in the future of carrying out said studies on different structures, with an extensive reproduction of different seismic data obtained by accelerograms and finally, the research question posed in the preliminary project, presented to the directors of the academic program Technology in Electronics, is answered.