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Advisor(s)
Abstract(s)
O conceito de atirantamento surgiu no contexto de promover a interação global dos
edifícios, nomeadamente, estabelecer as referidas ligações, de modo a prevenir o
derrubamento para o exterior das paredes de fachada, perante a ocorrência de ação sísmica
ou assentamento das fundações.
Neste sentido, o presente trabalho tem como objetivo, estudar o comportamento dos
atirantamentos ancorados no plano perpendicular das fachadas, quando solicitados à
tração. No entanto, como as alvenarias são elementos heterogéneos, houve necessidade de
desarticular os atirantamentos e estudar cada uma das partes que o compõe: tirantes
injetados em alvenarias e sistemas de ancoragem.
Em primeiro lugar, foi elaborado um estudo preliminar sobre tirantes injetados em
alvenarias, o qual incidiu no seu dimensionamento, na análise de sensibilidade,
apresentação de um caso de estudo e comparação de resultados.
Numa segunda fase fez-se uma revisão bibliográfica dos tipos de Sistemas de Ancoragens
mais comuns, onde foram mencionados alguns aspetos, nomeadamente a importância, o
objetivo e condições da sua aplicação.
Por último, associaram-se as duas componentes e foram estudados os Atirantamentos. Fezse
um estudo da sua utilização e do seu interesse de aplicação. Foi também analisada uma
forma de metodologia de dimensionamento, quando inseridos em alvenarias de tijolo e
pedra.
Finalizado este estudo foram traçadas as conclusões e sugeridas perspetivas futuras.
The concept of tie-rods arose in the context of promoting a global interaction of buildings, namely, to establish the referred connections in order to prevent the collapse of the walls to the outside of the façade, in face of seismic activity or settlement of the foundations. In this sense, the present work aims to study the behavior of tie-rods in the out-of-plane behavior of façades under tension. However, due to the heterogeneity of the walls, it was necessary disarticulate the tie-rods mechanism. It was also necessary to study each of the parts that compose it: injected bars into the masonry and anchorage systems. Firstly, it was conducted a preliminary study about injected bars into masonry, which has focused on their design, sensitivity analysis, presentation of a case study and comparison of results. Secondly, it has been made a literature review of the different and more common, anchorage systems, where some relevant aspects have been mentioned, such as the importance, the purpose and the conditions of their application. In the end, these two components were associated and the mechanism of tie-rods has been studied. It was made a study of their use and interest of application. It was also analyzed a methodology for design, when these are inserted in brick and stone masonry. This study has been completed with the conclusions and suggestions for future developments.
The concept of tie-rods arose in the context of promoting a global interaction of buildings, namely, to establish the referred connections in order to prevent the collapse of the walls to the outside of the façade, in face of seismic activity or settlement of the foundations. In this sense, the present work aims to study the behavior of tie-rods in the out-of-plane behavior of façades under tension. However, due to the heterogeneity of the walls, it was necessary disarticulate the tie-rods mechanism. It was also necessary to study each of the parts that compose it: injected bars into the masonry and anchorage systems. Firstly, it was conducted a preliminary study about injected bars into masonry, which has focused on their design, sensitivity analysis, presentation of a case study and comparison of results. Secondly, it has been made a literature review of the different and more common, anchorage systems, where some relevant aspects have been mentioned, such as the importance, the purpose and the conditions of their application. In the end, these two components were associated and the mechanism of tie-rods has been studied. It was made a study of their use and interest of application. It was also analyzed a methodology for design, when these are inserted in brick and stone masonry. This study has been completed with the conclusions and suggestions for future developments.
Description
Keywords
Atirantamentos Tirantes Sistemas de ancoragens Alvenarias Tie-rods Masonry Anchored system
Pedagogical Context
Citation
Publisher
Instituto Politécnico do Porto. Instituto Superior de Engenharia do Porto