| Revista: | Journal of the Brazilian Society of Mechanical Sciences |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000312134 |
| ISSN: | 0100-7386 |
| Autores: | Deus, E.P1 Venturini, W.S2 Peil, U3 |
| Instituciones: | 1Universidade Federal do Ceara, Departamento de Engenharia Mecanica, Fortaleza, Ceara. Brasil 2Universidade de Sao Paulo, Escola de Engenharia de Sao Carlos, Sao Carlos, Sao Paulo. Brasil 3Institute for Steel Structures, Braunschweig, Niedersachsen. Alemania |
| Año: | 2002 |
| Periodo: | Mar |
| Volumen: | 24 |
| Número: | 1 |
| Paginación: | 76-81 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental |
| Resumen en inglés | Crack formation and growth in steel bridge structural elements may be due to loading oscillations. The welded elements are liable to internal discontinuities along welded joints and sensible to stress variations. The evaluation of the remaining life of a bridge is needed to make cost-effective decisions regarding inspection, repair, rehabilitation, and replacement. A steel beam model has been proposed to simulate crack openings due to cyclic loads. Two possible alternatives have been considered to model crack propagation, which the initial phase is based on the linear fracture mechanics. Then, the model is extended to take into account the elastoplastic fracture mechanic concepts. The natural frequency changes are directly related to moment of inertia variation and consequently to a reduction in the flexural stiffness of a steel beam. Thus, it is possible to adopt a nondestructive technique during steel bridge inspection to quantify the structure eigenvalue variation that will be used to localize the grown fracture. A damage detection algorithm is developed for the proposed model and the numerical results are compared with the solutions achieved by using another well know computer code |
| Disciplinas: | Ingeniería |
| Palabras clave: | Ingeniería mecánica, Estructuras de acero, Puentes, Fatiga, Evaluación, Fracturas |
| Keyword: | Engineering, Mechanical engineering, Steel structures, Bridges, Fatigue, Evaluation, Fractures |
| Texto completo: | Texto completo (Ver HTML) |
