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Nonlinear material influence on reinforced concrete beams’ immediate deflections
Influencia de la no linealidad de material en las deflexiones inmediatas de vigas de concreto reforzado
DOI:
https://doi.org/10.15446/ing.investig.v27n2.14835Keywords:
beam, reinforced concrete, material nonlinearity, immediate deflection (en)vigas, concreto reforzado, no linealidad de material, deflexiones inmediatas (es)
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This paper presents an analytical and experimental research programme’s results regarding material nonlinearity’s influence on reinforced concrete beams’ immediate deflections. Six full-size laboratory beams were tested under different type of loads in the experimental programme. The ANSYS finite element software nonlinear material model was used for simulating the beams’ analytical behavior. Comparing ANSYS nonlinear material model results, ACI 318 equations and the results of the tests made revealed that a beam’s structural behavior is strongly influenced by material nonlinearity.
Este artículo presenta los resultados analíticos y experimentales de una investigación realizada por el Grupo de Investigación GIES sobre la influencia de la no linealidad de material sobre las deflexiones inmediatas de vigas de concreto reforzado. Bajo condiciones reales y diferentes situaciones de carga fueron ensayadas seis vigas de dicho material. El comportamiento teórico de las vigas fue simulado mediante el modelo no lineal de material del programa comercial de elementos finitos Ansys®. La comparación de los resultados del modelo no lineal de Ansys®, las recomendaciones del código de construcción ACI 318, y los ensayos experimentales, mostraron que el comportamiento estructural de una viga simplemente apoyada está fuertemente influenciado por la no linealidad de material.
References
ANSYS, Inc., ANSYS, INC. Theory reference, SAS IP, 2004.
Willam, W. J. and Warnke, E.P., Constitutive model for the triaxial behavior of concrete., Proceedings, International Association for Bridge and Structural Engineering, Vol. 19, ISMES, Bergamo, Italy, 1975, pp. 174, 1975.
CEB-FIP MODEL CODE, 1990.
Bathe, K. J., Finite element procedures., Prentice-Hall, Inc., Upper Saddle River, New Jersey, 1996.
ACI 318-03., American Concrete Institute., Building code requirements for reinforced concrete, 2003.
NSR 98., Normas Colombianas de Diseño y Construcción Sismo Resistente Asociación Colombiana de Ingeniería Sísmica, 3R Editores, Segunda Edición, Colombia, 2001.
Segura-Franco, J., Estructuras de concreto I., Universidad Nacional de Colombia, Quinta Edición, Colombia, 2002.
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Copyright (c) 2007 Alexander Gómez Cassab, Juan Manuel Lizarazo Marriaga
This work is licensed under a Creative Commons Attribution 4.0 International License.
The authors or holders of the copyright for each article hereby confer exclusive, limited and free authorization on the Universidad Nacional de Colombia's journal Ingeniería e Investigación concerning the aforementioned article which, once it has been evaluated and approved, will be submitted for publication, in line with the following items:
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