Análisis estático no lineal de una estructura mediante el método de control de desplazamientos

Abstract

The Non-Linear Static Analysis (Pushover) simulates the seismic action by applying a pattern of lateral loads, through this analysis we can determinate the maximum capacity of the structure and compare it with the design load. Therefore, a Pushover analysis improves the quality of the design, providing the engineer with a more reliable prediction on the performance of a system that is under design or research. Currently, there are commercial and free-use programs that perform nonlinear static analysis, in which a load is applied and it increases in magnitude until the structure can no longer resist. At this point, the stiffness of the structure is zero or may even be negative. Until this phase, a load could be applied and the displacements could be obtained with the force method. However, having a singular or negative define matrix, it is not possible to apply this method because it is necessary to apply a displacement method. That is why the objective of this research is to develop the complete curve of the nonlinear analysis of a structure, verify it by means of existing softwares that perform this analysis, and develop an academic example in which the methodology used is explained in detail. The results obtained will provide an information base to understand the simulation and analytical methodology of the real behavior of the structure.