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http://hdl.handle.net/11422/3064| Type: | Dissertação |
| Title: | Resistência ao esforço cortante de peças de concreto armado de seção transversal circular |
| Author(s)/Inventor(s): | Nunes, João Carlos Alves |
| Advisor: | Nagato, Yosiaki |
| Abstract: | Apresentam-se os resultados de uma pesquisa experimental sobre a ruptura por esforço cortante em peças de concreto armado de seção transversal circular. Foram ensaiadas 8 vigas com seção transversal de 0,4 m de diâmetro e 3,0 m de vão, carregadas por duas cargas concentradas simétricas. Foram variadas as distâncias entre as cargas e os apoios, a taxa de armadura transversal e a taxa de armadura longitudinal. Os resultados experimentais do esforço cortante de ruptura foram comparados com valores teóricos fornecidos por algumas normas e recomendações, com algumas extrapolações devido ao fato da seção transversal ser circular. Verificou-se que as normas e recomendações estudadas conduziram a resultados quase sempre a favor da segurança, mas devido ao pequeno número de ensaios realizados e a limitada faixa de variação dos parâmetros envolvidos, qualquer conclusão definitiva sobre o assunto seria precipitada. Recomenda-se a realização de mais ensaios para o melhor conhecimento do assunto. |
| Abstract: | The results of an experimental research on the shear failure of reinforced concrete members with circular cross-section are presented. Eight simply supported beams with a 3,0 m span and a 0,4 m diameter cross-section were tested by loading them with two symmetrical concentrated forces. The variable parameters were the distance from one of the concentrated force to the nearest support and the ratios of longitudinal and transverse reinforcement. The measured ultimate shear forces were compared with predictions based on Design Codes and late recommendations. These comparisons were made by adjusting design formulae for other cross-section geometries to the circular case. It was observed that these Design predictions are usually conservative. But, due to the limited number of tests in the present experimental programme and the limited range of the parameters involved, any premature conclusion taken from this research would seem injustifiable. It is recommended that more tests should be conducted for a better understanding of the subject. |
| Keywords: | Engenharia Civil |
| Subject CNPq: | CNPQ::ENGENHARIAS::ENGENHARIA CIVIL |
| Program: | Programa de Pós-Graduação em Engenharia Civil |
| Production unit: | Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia |
| Publisher: | Universidade Federal do Rio de Janeiro |
| Issue Date: | Aug-1981 |
| Publisher country: | Brasil |
| Language: | por |
| Right access: | Acesso Aberto |
| Appears in Collections: | Engenharia Civil |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 155771.pdf | 1.69 MB | Adobe PDF | View/Open |
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