Método simplificado para modelación del sistema marco-plataforma de madera utilizando un programa computacional de elementos finitos
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2019
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es
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Universidad Andrés Bello
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Licencia CC
Licencia CC
Resumen
El presente estudio consiste en la elaboración de una metodología simplificada de modelación computacional de muros de corte de madera utilizando el sistema marco-plataforma, aplicando factores de modificación de las rigideces que actúan en el plano del muro de corte. Para ello,se considera un análisis lineal que cumple con las formulaciones presentadas por Euler-Bernoulliy la teoría de vigas de Timoshenko. La aplicación de estos coeficientes de modificación de rigidez a los distintos muros estructurales de cortemodelados, permiten disminuir considerablemente los tiempos de proceso computacional al optar por un modelo lineal; en contraste con el modelo no-lineal e iterativo. Para llevar a cabo este estudio, se establecieron diferentes valores de materiales para pies derechos según en la norma NCh1198, tipos de fijación, conectores y propiedades de las placas de OSB estructural según en el código SDPWS(versión 2015). Los coeficientes obtenidos mediante las formulaciones se ingresaron a diferentes modelos computacionales utilizando el programa ETABS, el cual permitió evaluar la exactitud de los coeficientes calculados y así aplicar factores de corrección a los mismos. Posteriormente, a partir de los resultados obtenidos del proceso de formulación y modelación, se crearon tablas de coeficientes de modificación de rigideces para distintas configuraciones de muros de corte respecto al sistema de muro marco-plataforma de madera.
The present study consists in the elaboration of a simplified methodology of computational modeling of wood-frame shear wall, applying stiffness modification factors that act on the shear wall plane. To do this, a linear analysis is considered complying the formulations presented by Euler-Bernoulli and Timoshenko's beam theory. The application of these stiffness modification factors to several structural shear walls reduces considerably the computational process time when opting for a linear model, unlike the non-linear and iterative model. To carry out this study, different values of materials for stud wall were established according to the NCh1198 standard, hold down, fasteners and OSB structural sheathing properties according to the SDPWS code (version 2015). The coefficients obtained through the formulations were introduced into several computational models using the ETABS software, which allowed evaluating the accuracy of the calculated coefficients and the application of correction factors to them. Subsequently, from the results obtained from the formulation and modeling process, stiffness modification factors tables were created for different shear wall configurations according to the wood-frame shear wall.
The present study consists in the elaboration of a simplified methodology of computational modeling of wood-frame shear wall, applying stiffness modification factors that act on the shear wall plane. To do this, a linear analysis is considered complying the formulations presented by Euler-Bernoulli and Timoshenko's beam theory. The application of these stiffness modification factors to several structural shear walls reduces considerably the computational process time when opting for a linear model, unlike the non-linear and iterative model. To carry out this study, different values of materials for stud wall were established according to the NCh1198 standard, hold down, fasteners and OSB structural sheathing properties according to the SDPWS code (version 2015). The coefficients obtained through the formulations were introduced into several computational models using the ETABS software, which allowed evaluating the accuracy of the calculated coefficients and the application of correction factors to them. Subsequently, from the results obtained from the formulation and modeling process, stiffness modification factors tables were created for different shear wall configurations according to the wood-frame shear wall.
Notas
Tesis (Ingeniero Civil)
Palabras clave
Construcciones en Madera, Muros, Modelos Matemáticos, Pruebas