Loading...
Publication
Estudo da influência das dimensões no comportamento mecânico de alvenaria de calcário de edifícios antigos
| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 2.06 MB | Adobe PDF |
Authors
Advisor(s)
Abstract(s)
O presente estudo foi baseado na realização de uma investigação com base
experimental, que pretende prestar uma contribuição para o conhecimento do
comportamento mecânico da alvenaria de pedra, nomeadamente de calcário. De forma
a analisar a influência da variação do número de fiadas de alvenaria no comportamento
da compressão uniaxial, são utilizadas três séries de provetes de alvenaria de
dimensões reduzidas com diferentes números de fiadas
A caracterização dos materiais constituintes da alvenaria (calcário e argamassa) é
realizada. Os provetes de alvenaria utilizados, foram de alvenaria aparelhada regular de
pano simples com juntas de argamassa á base de areia e cal hidráulica natural. Os
materiais utilizados no trabalho experimental foram selecionados e fabricados para
serem representativos das características mecânicas presentes em edifícios antigos,
caracterizadas por blocos de pedra heterogéneos e argamassas de baixa resistência.
É apresentado um novo modelo de preditivo da resistência à compressão de alvenaria,
tendo em consideração o número de fiadas e a altura da alvenaria. O modelo é avaliado
através da comparação com outros modelos existentes e valores experimentais, os
resultados apresentaram uma boa concordância entre os valores experimentais e
analíticos.
The present study was based on a research based on experimental basis, which intends to provide a contribution to the knowledge of the mechanical behavior of stone masonry, namely limestone. In order to analyze the influence of varying the number of masonry courses on the behavior of uniaxial compression, three series of small size samples with different numbers of masonry courses are used. The characterization of the masonry materials (limestone prisms and mortar) are performed. The masonry specimens used are single-leaf regular ashlar masonry with joints made of natural hydraulic lime mortar and sand. The materials used in the experimental work are selected and manufactured to be representative of the mechanical characteristics present in old buildings, characterized by the non-homogenous stone blocks and low strength mortars. A new prediction model of the masonry compressive strength is herein presented that take into account the number of courses and the height of the dimensioned specimens. This procedure is evaluated by comparison with other existing models, experimental values and the results show a good agreement between the analytical and experimental values.
The present study was based on a research based on experimental basis, which intends to provide a contribution to the knowledge of the mechanical behavior of stone masonry, namely limestone. In order to analyze the influence of varying the number of masonry courses on the behavior of uniaxial compression, three series of small size samples with different numbers of masonry courses are used. The characterization of the masonry materials (limestone prisms and mortar) are performed. The masonry specimens used are single-leaf regular ashlar masonry with joints made of natural hydraulic lime mortar and sand. The materials used in the experimental work are selected and manufactured to be representative of the mechanical characteristics present in old buildings, characterized by the non-homogenous stone blocks and low strength mortars. A new prediction model of the masonry compressive strength is herein presented that take into account the number of courses and the height of the dimensioned specimens. This procedure is evaluated by comparison with other existing models, experimental values and the results show a good agreement between the analytical and experimental values.
Description
Keywords
Alvenaria Calcário Cal hidráulica Compressão Modelo preditivo e fiadas Masonry Limestone Hydraulic lime Compression Predictive model and Masonry courses