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Volume Title: ICASGE2023

DOI: ICASGE-STA

¹Mostafa Mohamed Aboelnour ; ²Mohamed Sakr; ³Ayman Ahmed Seleemah; ⁴Omnia Kharoop; Mostafa Mohamed Aboelnour; Ayman Ahmed Seleemah

¹Department of Structural Engineering,Faculty of Engineering,Tanta University

²Structural Analysis, Faculty of Engineering, Tanta University, Tanta, Egypt

³Structural Engineering Department, Faculty of Engineering, Tanta University, Tanta, Egypt

⁴Department of structural Engineering , Faculty of engineering , tanta , university

This study aims to provide finite element Model (FEM) to investigate the structural behavior of fiber reinforced concrete filled steel tube columns (CFST) with circular cross-section under combined cyclic loading and (monotonic) compression. Using the ABAQUS software, FEM was carried out of CFST columns tests. Firstly, a brief introduction and literature review on the topic is made. Then, the numerical models are described in detail with emphasis on the modelling of the materials (natural concrete, fiber reinforced concrete and steel) under cyclic loading. The concrete damaged plasticity model in ABAQUS was used as the constitutive model for concrete. This study defined the interface between steel tubes and concrete cores with surface-to-surface contact. A stress-strain constitutive model of concrete confined by circular steel tube is proposed. The model was validated using experimental results from the literature. The developed FE model of CFST column using ABAQS led to good agreement with the tested columns under cyclic loading. It is concluded that the models
yield similar results regarding stiffness, maximum loads, load–displacement hysteretic curves and failure modes as those obtained experimentally.

FE modeling; Fiber reinforced concrete; Concrete-filled steel tube (CFST); Columns; cyclic loading

Structural Analysis (STA)