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Previous issue date: 2017-03-24 / A an?lise estrutural de pontes com geometria longitudinal curva apresenta maior complexidade do que as retas, devido ao acoplamento entre o momento fletor e o momento de tor??o, levando a necessidade de utilizar elementos estruturais que transmitam esses esfor?os com efici?ncia. Os estudos sobre o comportamento estrutural de pontes curvas ainda precisam de uma maior quantidade de contribui??es, por isso, o objetivo principal desse trabalho ? realizar um estudo param?trico sobre a distribui??o de momento fletor devido a carga m?vel em pontes com tra?ado longitudinal curvo no plano horizontal, na posi??o longitudinal mais cr?tica a estrutura. Portanto, foram utilizados modelos anal?ticos de c?lculo referentes ao M?todo V-Load e ao M?todo M/R, bem como foram constru?dos 15 modelos num?ricos utilizando o MEF por meio do programa CSiBridge V17. Todos os estudos foram realizados com as cargas m?veis referentes ao TB-450 definido pela NBR 7188:2013. Os c?lculos revelaram que os fatores de distribui??o de momento fletor (FDMF) aumentam com a redu??o do raio de curvatura para as longarinas e/ou septos externos a curva. Al?m disso, nas pontes com longarinas curvas foi detectada uma distribui??o mais igualit?ria de momento fletor do que nas pontes com longarinas retas, o que tamb?m foi constatado atrav?s da inser??o de transversinas de apoio. Por fim, na an?lise dos m?todos anal?ticos, foram obtidos resultados superestimados de FDMF tanto para o V-load quanto para o M/R em rela??o as an?lises via MEF. / The structural analysis of bridges with curved longitudinal geometry presents greater complexity than the straight due to the coupling between the bending moment and the torsion moment, leading to the need to use structural members that transmit these forces efficiently. The structural behavior of curved bridges still needs a greater amount of contributions, so the main objective of this work is to perform a parametric study of the live load bending moment distribution in horizontally curved bridges in plan, at the most critical longitudinal position of the structure. For this, analytical models were used through the V-Load Method and the M/R Method, as well as 15 numerical models were constructed using MEF through the software CSiBridge V17. All the studies were performed with live load called TB-450 defined by NBR 7188: 2013. Calculations revealed that bending moment distribution factor (BMDF) increased with radius of curvature reduction for the external curve girder. In addition, an improvement was found in the distribution of bending moment through the insertion of support transverse. In the bridges with curved girders a more uniform bending moment distribution was detected than bridges with straight girders. Finally, in the analysis of the analytical methods, overestimated FDMF results were obtained both for the V-load and for the M/R in relation to the MEF analyzes.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/23445 |
| Date | 24 March 2017 |
| Creators | Rebou?as, Arthur da Silva |
| Contributors | 83729950606, http://lattes.cnpq.br/0915972389480304, Ara?jo, Francisco Adriano de, 02096507456, http://lattes.cnpq.br/9631210433206086, Nascimento Neto, Joel Ara?jo do, 83991301415, http://lattes.cnpq.br/2747505817148030, Barboza, Aline da Silva Ramos, 15082050869, http://lattes.cnpq.br/4857672279132119, Silva Filho, Jos? Neres da |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA CIVIL, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| 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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