Key elements for preserving the structural integrity of General Rafael Urdaneta bridge (PGRU) are its mobile supports. These supports were designed in the 50’s with simplified analytical models and other limitations, so it is unknown their maximum service loads. For addressing this issue, in this work: i) a nu-merical model is presented for the structural analysis of PGRU-type mobile support, which it is validated with analytical results from indirect tensile tests, and ii) a linear regression model is used to estimate the maximum service load as a function of design variables (e.g., properties and geometry). The linear regres-sion model was obtained from one- hundred computational simulations. This model achieved an excel-lent fit (R2 greater than 94%). The maximum service load values of the original design, the simulated ones (Pmax = 1,135 kN), and those estimated with the regression model (maxˆP= 1,044.5 kN) are consistent with the fact that the PGRU mobile supports currently experience loads greater than 981 kN without significant evidence of damage on the steel pipe or in the concrete cylinder
Título del documento: Key elements for preserving the structural integrity of General Rafael Urdaneta bridge (PGRU) are its mobile supports. These supports were designed in the 50’s with simplified analytical models and other limitations, so it is unknown their maximum service loads. For addressing this issue, in this work: i) a nu-merical model is presented for the structural analysis of PGRU-type mobile support, which it is validated with analytical results from indirect tensile tests, and ii) a linear regression model is used to estimate the maximum service load as a function of design variables (e.g., properties and geometry). The linear regres-sion model was obtained from one- hundred computational simulations. This model achieved an excel-lent fit (R2 greater than 94%). The maximum service load values of the original design, the simulated ones (Pmax = 1,135 kN), and those estimated with the regression model (maxˆP= 1,044.5 kN) are consistent with the fact that the PGRU mobile supports currently experience loads greater than 981 kN without significant evidence of damage on the steel pipe or in the concrete cylinder
Revista: Revista técnica de la Facultad de Ingeniería. Universidad del Zulia
Base de datos: PERIÓDICA
Número de sistema: 000446473
ISSN: 0254-0770
Autores: 1
2
2
2
2
Instituciones: 1Universidad Nueva Esparta, Facultad de Ingeniería, Venezuela
2Universidad del Zulia, Facultad de Ingeniería, Maracaibo, Zulia. Venezuela
Año:
Volumen: 38
Número: 2
Paginación: 104-111
País: Venezuela
Idioma: Español
Tipo de documento: Artículo
Enfoque: Analítico
Resumen en español Un elemento fundamental para preservar la integridad estructural del puente General Rafael Urda-neta (PGRU) lo constituyen sus apoyos móviles. El diseño de estos apoyos fue realizado en la década de los 50’s con modelos analíticos simplificados y otras limitaciones y, como resultado, no se conoce a ciencia cierta las cargas máximas de servicio que estos apoyos pueden soportar. En este trabajo, para determinar las citadas cargas se construyó: i) un modelo numérico para el análisis estructural de apoyos móviles del tipo PGRU validado con resultados analíticos de ensayo de tracción indirecta, y ii) un modelo de regresión lineal para estimar la carga máxima de servicio en función de variables de diseño (e.g., propiedades y configuración geométrica). El modelo de regresión lineal fue construido a partir de un conjunto de 100 (cien) ensayos computacionales lográndose un excelente ajuste (R2 mayor al 94%). Los valores de carga máxima de servicio para el diseño original del apoyo móvil, simulado (Pmax=1.135 kN) y estimado con el modelo de regresión (maxˆP= 1.044,5 kN) son consistentes con el hecho de que los apoyos en el PGRU soportan actualmente cargas mayores a 981 kN sin evidencias significativas de daños en el tubo de acero o el cilindro de concreto
Resumen en inglés Key elements for preserving the structural integrity of General Rafael Urdaneta bridge (PGRU) are its mobile supports. These supports were designed in the 50’s with simplified analytical models and other limitations, so it is unknown their maximum service loads. For addressing this issue, in this work: i) a nu-merical model is presented for the structural analysis of PGRU-type mobile support, which it is validated with analytical results from indirect tensile tests, and ii) a linear regression model is used to estimate the maximum service load as a function of design variables (e.g., properties and geometry). The linear regres-sion model was obtained from one- hundred computational simulations. This model achieved an excel-lent fit (R2 greater than 94%). The maximum service load values of the original design, the simulated ones (Pmax = 1,135 kN), and those estimated with the regression model (maxˆP= 1,044.5 kN) are consistent with the fact that the PGRU mobile supports currently experience loads greater than 981 kN without significant evidence of damage on the steel pipe or in the concrete cylinder
Disciplinas: Ingeniería
Palabras clave: Análisis estructural,
Modelación matemática,
Soporte de carga,
Soportes de Puentes,
Vigas
Keyword: Bridge supports,
Bridges,
Mathematical modelling,
Structural analysis
Texto completo: https://produccioncientificaluz.org/index.php/tecnica/article/view/20828/20702