Comparación de modelos sísmicos para un edificio histórico en mampostería

Abstract

Vol. 17, n° 2, pp. [105][106][107][108][109][110][111][112][113][114] 2018 Revista UIS Ingenierías AbstractIn this project, a historic masonry building in Sardinia, Italy has been considered as a case study for the comparison of two approaches for modeling, static and seismic analysis. Two software with different modeling approaches were employed with the purpose of comparing and discussing the results. SismiCad12 was used to simulate the structural behavior of the historic masonry building. SismiCad12 uses the Finite Element Method (FEM) that allows to model and analyze most types of 3D structures, and it is suitable for masonry structures. On the other hand, a different and innovative modeling approach called Frame Macro Elements (FME) was also applied using the 3Muri software, specially designed for assessing the linear, nonlinear, and seismic behavior of masonry structures.Assuming the same hypothesis to construct the 3D model of the structure in each code, the results of the static analysis show a different distribution of the vertical loads in the structure, which are more realistic in the FEM modeling. This different criterion of evaluation of the vertical loads carries a mechanism of "soft floor" in the pushover analysis in the FEM modeling, and therefore, a lower ultimate displacement corresponding to the collapse of the structure. On the other hand, in dynamic analyzes, FME modeling is more receptive to reality, involving a massive percentage of masses participating in the first vibration modes.Keywords: macro-elements; historic structures; pushover analysis. ResumenEn este proyecto se ha considerado como caso de estudio un edificio histórico de mampostería en Cerdeña, Italia, cuyo modelado, análisis estático y sísmico han sido desarrollados. En este estudio se han empleado dos programas informáticos con distintos enfoques de modelización con el propósito de comparar y discutir los resultados. Como primer simulador del comportamiento de la estructura en mampostería se ha elegido SismiCad12, que es una suite de Elementos Finitos (FEM, por sus siglas en inglés) que permite modelar y analizar la mayoría de los tipos de estructuras 3D y es adecuado para estructuras de mampostería. Por otro lado, se ha aplicado un método de modelado diferente e innovador denominado Frame Macro Elements (FME) con el software 3Muri, diseñado específicamente para evaluar el comportamiento lineal, no lineal y sísmico de las estructuras en mampostería.Suponiendo la misma hipótesis para construir el modelo 3D de la estructura en cada código, los resultados de los análisis estáticos muestran una diferente repartición de las cargas verticales en la estructura, las que son más realísticas en el modelado FEM. Este diferente criterio de evaluación de las cargas verticales lleva un mecanismo de "piso suave" 106M. Saba, D. Meloni en el análisis de pushover en el modelado FEM, y por lo tanto un desplazamiento ultimo inferior correspondiente al colapso de la estructura. Por lo contrario, en los análisis dinámicos el modelado FME es má...

An Assessment of the Performance of the Amasya Bayezid II Mosque Under Static and Dynamic Loads

“…The literature features studies that focus specifically on the geometry of historical buildings, such as the study by Perez et al (2019), and others that focus specifically on the construction approach, like those conducted by Sözen and Çavuş (2019), Cosgun (2012), Karanikoloudis et al (2020), Saba and Meloni (2018), Castori et al (2019), Degli Abbati et al (2019, Milani et al (2017) and Boschi et al (2018). In these cited studies, the buildings were modeled in a three-dimensional form and subjected to static and dynamic analyses within the environment of finite elements.…”

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