Abstract
In this paper, an in-depth analysis of the structural response of concrete-filled tubular structures (CFT) is presented. The main objective of the study is to assess the resistance of these structural elements when subjected to lateral displacements. These displacements, together with the corresponding axial forces, represent the actions to which the integral bridges piers are subjected to. For the sake of studying this response, a numerical model is used as a simulation tool over an hypothetical matrix of CFT. These numerical studies together with a wide experimental database found in the literature have been useful for drawing conclusions concerning the cross-sectional capacity of the CFT. A design proposal for this cross-sectional capacity which accounts for confinement is given. This proposal has been compared structurally with the present formulation found in EN1994.
Highlights
Se utiliza un modelo tridimensional de elementos finitos basados en sólidos y en elementos tipo Shell –Abaqus-Simulia (30)– el cual se ha sido contrastado con la experimentación por otros autores (10)
La ecuación constitutiva adoptada para el acero es elasto-plástica perfecta sin endurecimiento por deformación
El estudio se basa en una matriz hipotética de dos pilas metálicas circulares rellenas de hormigón con dimensiones inspiradas en geometrías reales de pilas de puentes integrales
Summary
An in-depth analysis of the structural response of concrete-filled tubular structures (CFT) is presented. The main objective of the study is to assess the resistance of these structural elements when subjected to lateral displacements. These displacements, together with the corresponding axial forces, represent the actions to which the integral bridges piers are subjected to. For the sake of studying this response, a numerical model is used as a simulation tool over an hypothetical matrix of CFT. These numerical studies together with a wide experimental database found in the literature have been useful for drawing conclusions concerning the cross-sectional capacity of the CFT.
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