Browsing by Author "González del Solar, Gerardo"

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    Capítulo 9 : modeling of Structural Masonry
    (*, 2023-01-01) Maldonado, Graciela; González del Solar, Gerardo
    Masonry is a composite material, and its behavior shows that its weaknesses lie in the minimum resistance of its components and the characteristics of the interfaces between them. Ceramic brick masonry has technological characteristics that make it suitable for housing and building functions. The bricks, of reduced dimensions and joined with mortars of variable characteristics, have the advantage of adapting to almost all construction projects considering the influence of the environment on their service life. The investigation of the structural behavior of masonry has had very significant advances in the laboratory during the last mid-century, which has allowed numerical modeling of the behavior of the material and validation of failure modes under seismic actions. The behavior of heritage masonry with thick walls differs greatly from simple masonry using conventional techniques and materials. These differences in behavior have only been confirmed through numerical simulation contrasted with experimental research. This chapter presents the numerical modeling used for simple and confined masonry with reinforced concrete and for very thick heritage masonry, using the finite element method validated with full-scale laboratory experiences.
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    Formulación, implementación y validación de un modelo de daño escalar para materiales frágiles aplicado a elementos sólidos tridimensionales
    (2018-03-01) González del Solar, Gerardo; Martín, Pablo; Maldonado, Noemí
    La mecánica del daño continuo describe el deterioro progresivo de las propiedades mecánicas de los materiales a partir de un modelo fenomenológico. En este trabajo se presenta la formulación, implementación y validación de un modelo de daño escalar aplicado a elementos sólidos tridimensionales. Se trata de un modelo de gran versatilidad definido a partir de una superficie de falla y una variable de daño escalar. Su campo de aplicación es la modelación numérica de materiales elásticos isótropos con degradación de la rigidez cuya tensión límite a tracción es igual a la de compresión. El modelo queda definido a partir de cuatro propiedades del material determinables en un ensayo Tensión-Desplazamiento. El modelo es implementado en el software ABAQUS por medio de una subrutina UMAT. Para la resolución de las ecuaciones de equilibrio no lineal se propone un algoritmo de tipo implícito (Método de Backward Euler). La validación a esfuerzos de tracción muestra una adecuada correlación entre los resultados numéricos y los experimentales, con una dispersión de la energía disipada del 6%. Finalmente, se presenta un ejemplo de aplicación. Los resultados alcanzados demuestran que se trata de una herramienta sencilla y, a la vez, poderosa para el análisis numérico de materiales frágiles.
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    Historic Masonry
    (Universidad Tecnológica Nacional. Facultad Regional Mendoza, 2019-07-01) Maldonado, Graciela; Martín, Pablo; González del Solar, Gerardo; Domizio, María
    Masonry is a composite material characterised by its good behaviour under dead loads and in a nonaggressive environment. However, this noble material does not satisfactorily resist seismic loads. The different types of historical masonry that have remained over time are characterised by an adequate mixture of materials with low chemical reactions that are degrading due to environmental conditions. There are numerous historical masonry construction techniques in the world, reflecting local conditions of materials and workmanship. The key to its permanence and maintenance over time despite the effects of earthquakes is the construction technology and quality of materials used. As a result of earthquake damage observation and experimental research, various technical solutions for rehabilitation and retrofit of masonry are now available. Finite element modelling has become a very useful tool to identify the damage problem in historical masonry but requires a significant contribution of parameters obtained from destructive and nondestructive tests.
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    Modeling of Structural Masonry Palabras
    (Amjad Almusaed and Asaad Almssad, 2023-01-01) González del Solar, Gerardo; Domizio, María; Martín, Pablo; Maldonado, Noemí
    Masonry is a composite material, and its behavior shows that its weaknesses lie in the minimum resistance of its components and the characteristics of the interfaces between them. Ceramic brick masonry has technological characteristics that make it suitable for housing and building functions. The bricks, of reduced dimensions and joined with mortars of variable characteristics, have the advantage of adapting to almost all construction projects considering the influence of the environment on their service life. The investigation of the structural behavior of masonry has had very significant advances in the laboratory during the last mid-century, which has allowed numerical modeling of the behavior of the material and validation of failure modes under seismic actions. The behavior of heritage masonry with thick walls differs greatly from simple masonry using conventional techniques and materials. These differences in behavior have only been confirmed through numerical simulation contrasted with experimental research. This chapter presents the numerical modeling used for simple and confined masonry with reinforced concrete and for very thick heritage masonry, using the finite element method validated with full-scale laboratory experiences.
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    Puesta en Valor de la Mampostería Histórica: casos de Estudio en Mendoza, Argentina
    (2020-09-28) Maldonado, Graciela; Martín, Pablo; González del Solar, Gerardo; Maldonado, Ignacio; Buss, Diego; Domizio, María
    En América se ha utilizado la mampostería cerámica cocida desde mediados del siglo XVIII la cual forma parte del patrimonio cultural local. La permanencia en el tiempo se debe a su técnica de construcción, calidad de materiales y mantenimiento además del efecto de los terremotos. Se presentan resultados de inspección detallada de cinco construcciones de mampostería cerámica de valor patrimonial con diferentes patologías que requieren distintas tecnologías de puesta en valor en la zona de mayor riesgo sísmico de Argentina. La metodología de estudio utilizada para las propuestas de rehabilitación incluye la modelación por elementos finitos, lo que requiere de parámetros de comportamiento de mampuestos y morteros para comprender las patologías subyacentes obtenidos de ensayos De laboratorio y monitoreo in situ. La puesta en valor debe considerar que no se presente incompatibilidad de materiales aplicando tecnologías locales.