Desarrollo de un modelo analítico de columna de hormigón armado que considere la degradación frente a eventos sísmicos.

Abstract

This paper presents the development of an analytical model of reinforced concrete columns subjected to seismic loads, implemented using OpenSeesPy software with the aim of analyzing the various dynamic effects and the progressive degradation of structural elements. Nonlinear material concepts were used in its construction, and constitutive models were implemented, such as Concrete07 for concrete and Hysteretic for steel, second-order effects using P-Delta, and Rayleigh damping. The model was calibrated using a Bayesian approximation approach, which allowed parameters to be adjusted based on previously obtained experimental data and actual seismic records. Among those used were the 2011 Japan and 2010 Chile earthquakes, selected for their duration and intensity. The results showed that, although the model was able to reproduce general trends in displacements and deformations, the similarity with the experimental tests was not high. In particular, significant differences were observed in the vibration periods, notably in the simulation of the 2010 Chile earthquake, highlighting the difficulties of accurately representing all the dynamic aspects of reinforced concrete behavior under complex seismic stresses.