Publicação
Sensitivity analysis of the seismic behavior of ancient masonry buildings
| Resumo: | The study of the vulnerability of ancient buildings is receiving much attention in the recent decades due to the increasing interest in the conservation of the built heritage and the awareness that life and property must be preserved. The different types of masonry present common features that provide high seismic vulnerability to these buildings, such as the high specific mass, the low tensile strength, the low to moderate shear strength and the low ductility. In addition to the influence of the material properties, the seismic behavior of ancient masonry buildings depends on factors such as the geometry of the structure, connections between orthogonal walls, connections between structural walls and floors, connections between walls and roof, the foundation behavior, the stiffness of the floors and the behavior of the non-structural elements. The present study aims at evaluating the variation on response of the structure varying the material and geometrical properties of the ancient masonry buildings. The response is obtained through the non linear dynamic and static analysis with time integration and is focused on the dynamic behavior of the masonry walls and timber floors. First, a reference numerical model is prepared according to the experimental tests carried out at shaking table. Then, a sensitivity analysis is carried out and the global behavior, the in plane and out-ofplane displacements of the masonry walls and the damage are compared with respect to the reference numerical model. Several parameters can be considered in the sensitivity analysis, namely: the number of floors, the aspect ratio of the spandrels, the aspect ratio of the lintels, the Young’s modulus of the masonry walls, the Young’s modulus of the floors. The expected major results coming from this work are the definition of the seismic response range of ancient masonry buildings taking into account the deviations on its properties, and the identification and quantification of the parameters that most influence its seismic performance. |
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| Autores principais: | Meneses, Maria Francisca Nobre |
| Assunto: | Gaioleiro building Seismic performance of ancient masonry buildings Dynamic non linear analysis Edifícios gaioleiros Comportamento sísmicos de edifícios de alvenaria antigos Análise dinâmica não linear |
| Ano: | 2013 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | The study of the vulnerability of ancient buildings is receiving much attention in the recent decades due to the increasing interest in the conservation of the built heritage and the awareness that life and property must be preserved. The different types of masonry present common features that provide high seismic vulnerability to these buildings, such as the high specific mass, the low tensile strength, the low to moderate shear strength and the low ductility. In addition to the influence of the material properties, the seismic behavior of ancient masonry buildings depends on factors such as the geometry of the structure, connections between orthogonal walls, connections between structural walls and floors, connections between walls and roof, the foundation behavior, the stiffness of the floors and the behavior of the non-structural elements. The present study aims at evaluating the variation on response of the structure varying the material and geometrical properties of the ancient masonry buildings. The response is obtained through the non linear dynamic and static analysis with time integration and is focused on the dynamic behavior of the masonry walls and timber floors. First, a reference numerical model is prepared according to the experimental tests carried out at shaking table. Then, a sensitivity analysis is carried out and the global behavior, the in plane and out-ofplane displacements of the masonry walls and the damage are compared with respect to the reference numerical model. Several parameters can be considered in the sensitivity analysis, namely: the number of floors, the aspect ratio of the spandrels, the aspect ratio of the lintels, the Young’s modulus of the masonry walls, the Young’s modulus of the floors. The expected major results coming from this work are the definition of the seismic response range of ancient masonry buildings taking into account the deviations on its properties, and the identification and quantification of the parameters that most influence its seismic performance. |
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