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Previous issue date: 2012-02-28 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The main objective of this thesis was the study of bracing panels of structural
masonry, by applying the Finite Element Method and Strut and Tie Method. It was
analyzed the following aspects: the effect of orthotropy on the behavior of the panels;
distribution of horizontal forces between panels for buildings; comparison between
Equivalent Frame and Finite Elements models; panels design with the Strut and Tie
Method.
The results showed that one should not disregard the orthotropy, otherwise
this can lead to models stiffer than the real. Regarding the distribution of horizontal
forces, showed that the disregard of lintels and shear deformation leads to significant
differences in the simplified model. The results showed also that the models in Finite
Element and Equivalent Frame exhibit similar behavior in respect to stiffness of
panels and stress distribution over the sessions requested.
It was discussing criteria for designing Strut and Tie Method models in one
floor panels. Then, the theoretical strength these panels was compared with the
rupture strength of panels tested in the literature. The theoretical maximum strength
were always less than the rupture strength of the panels obtained in tests, due to the
fact that the proposed model cannot represent the behavior of the masonry after the
start of the panel cracking due to plasticization of the reinforcement / O objetivo principal desta disserta??o foi o estudo de pain?is de
contraventamento de alvenaria estrutural, atrav?s da aplica??o do M?todo dos
Elementos Finitos e do M?todo de Bielas e Tirantes. Foram analisados os seguintes
aspectos: o efeito da ortotropia no comportamento de pain?is; distribui??o de for?as
horizontais entre pain?is de edif?cios; compara??o entre os modelos de P?rtico
Equivalente e Elementos Finitos; c?lculo de pain?is com o M?todo de Bielas e
Tirantes.
Os resultados permitiram concluir que n?o se deve desconsiderar a ortotropia,
sob pena de conduzir a modelos mais r?gidos que o real. Em rela??o ? distribui??o
de for?as horizontais, evidenciou-se que a desconsidera??o dos lint?is e da
deforma??o por cisalhamento acarretam diferen?as significativas relativamente ao
modelo de barras isoladas. Os resultados permitiram concluir, ainda que os modelos
em Elementos Finitos e de P?rtico Equivalente apresentam comportamento
semelhante no que se refere ? rigidez de pain?is e distribui??o de tens?es nas
sess?es mais solicitadas.
Foram discutidos crit?rios para a concep??o de modelos de bielas e tirantes
em pain?is isolados. Em seguida, a for?a horizontal te?rica destes pain?is foi
comparada com a carga de ruptura de pain?is ensaiados dispon?veis na literatura.
As for?as m?ximas te?ricas foram sempre inferiores ? for?a de ruptura dos pain?is,
obtidas em ensaios, devido ao fato de que o modelo proposto n?o ? capaz de
representar o comportamento da alvenaria ap?s o inicio da fissura??o do painel
devido ? plastifica??o das armaduras
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/14839 |
| Date | 28 February 2012 |
| Creators | Damasceno, J?lio C?sar Cavalcante |
| Contributors | CPF:83991301415, http://lattes.cnpq.br/2747505817148030, N?brega, Petrus Gorg?nio Bulh?es da, CPF:51328704491, http://lattes.cnpq.br/8546876805965263, Oliveira, Romilde Almeida de, CPF:00363820434, http://lattes.cnpq.br/9272579827887449, Nascimento Neto, Joel Ara?jo do |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Engenharia Civil, UFRN, BR, MEC?NICA DAS ESTRUTURAS, ESTRUTURAS DE CONCRETO E ALVENARIA E MATERIAIS E PROCESSOS CONSTRUTIVOS |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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