Three-Dimensional Numerical Analysis of Hollow-Core Composite Building Columns

  • Mohanad M. Abdulazeez
  • Mohamed A. ElGawady
Conference paper


This paper presents a numerical study on the behavior of hollow-core fiber-reinforced polymer-concrete-steel (HC-FCS) columns with square steel tubes under combined axial compression and flexural loadings. The investigated HC-FCS column consisted of an outer circular fiber-reinforced polymer (FRP) tube, an inner square steel tube, and a concrete wall between them. Three-dimensional numerical models were developed using LS-DYNA software for modeling large-scale HC-FCS columns. The finite element (FE) models were designed and validated against experimental results gathered from HC-FCS columns tested under cyclic lateral loading. The FE results were in decent agreement with the experimental backbone curves. These models subsequently were used to conduct a parametric FE study investigating the effects of the confinement ratio and buckling instabilities on the behavior of the HC-FCS columns. In general, the HC-FCS columns with square steel tube failed by steel tube local buckling followed by FRP rupture. The obtained local buckling stresses that result from the FE models were compared with the values calculated from the empirical equations of the design codes. Finally, based on the FE model results, an expression was proposed to predict the square steel tubes local buckling stresses of HC-FCS columns.


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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Civil, Architectural, and Environmental EngineeringMissouri University of Science and TechnologyRollaUSA

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