Using optimisation for calibrating finite element models for adobe walls
Calibración de modelos de elementos finitos de muros de adobe por optimización
DOI:
https://doi.org/10.15446/ing.investig.v29n2.15155Keywords:
optimisation, finite element, model calibration, adobe (en)optimización, elementos finitos, calibración de modelos, adobe (es)
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This paper presents a proposal for applying optimisation schemes to calibrating 3D linear and non-linear finite element models for analysing structural walls made out of adobe. The calibration was based on laboratory data and that from previous research. Simulation and calibration involves a deep study of the conceptual model of adobe’s structural behaviour, mathematical and numerical models and the interrelationship with optimisation schemes arising from minimising an objective function. This is defined in terms of design variables and is restricted by the values of state variables. Both were obtained from the finite element model developed at ANSYS. The optimisation scheme with which the model was automatically calibrated required a macro to be programmed using an APDL language package. This research was aimed at implementing nonlinear computational models for the structural analysis of walls based on experimental data; this provided a tool for assessing the behaviour of adobe walls with greater security so that decisions can be made to make structural rehabilitation feasible and efficient.
Este trabajo presenta una propuesta de aplicación de esquemas de optimización a la calibración de modelos lineales y no líneales 3D de elementos finitos en el análisis estructural de muros de adobe. El desarrollo del proceso de calibración parte de los datos de laboratorio y de investigaciones previas. El proceso de simulación y calibración comprende un estudio profundo del modelo conceptual del comportamiento estructural del adobe, modelo matemático y numérico y la interrelación con esquemas de optimización que son planteados a través de la minimización de una función objetivo. Esta se define en términos de las variables de diseño y se restringe con los valores de las variables de estado. Ambas, son obtenidas del modelo de elementos finitos desarrollado en Ansys. El esquema de optimización con el que se realiza la calibración automatizada del modelo requiere de la programación de una macro con el lenguaje APDL del paquete. Con esta investigación se pretende avanzar en la implementación de modelos computacionales no lineales para el análisis estructural de muros basados en datos experimentales, que permita disponer de una herramienta para evaluar el comportamiento de muros de adobe con mayor seguridad con el fin de tomar decisiones de rehabilitación estructural viables y eficientes.
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Copyright (c) 2009 Wilson Rodríguez Calderón, Myriam Rocío Pallares Muñoz

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