Finite element simulation of circular short CFDST columns under axial compression

M. Elchalakani, V. I. Patel, A. Karrech, M. F. Hassanein, S. Fawzia, B. Yang

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Circular concrete-filled double-skin tubular (CFDST) columns increase considerably the displacement ductility and peak strength of the sandwiched concrete due to the confinement provided by the steel tubes. This study describes the characteristics of short CFDST columns under compression and investigates the influences of the sandwiched concrete thickness, the yield stress of outer tube, tube thickness of the both outer and inner components and sandwiched concrete strength on the structural performance of circular short CFDST columns. To obtain the structural behaviour of circular CFDST columns, a finite element analysis is conducted. In this numerical modelling, the choice of the concrete and steel material properties is essential. Accordingly, different steel and concrete models are adapted from previous researches, and then they are verified by comparing their results with the experimental results. The best material models are presented and used in the parametric study which aims at examining the effects of several factors on the load-displacement relationships of the CFDST columns.

Original languageEnglish
Pages (from-to)607-619
Number of pages13
JournalStructures
Volume20
DOIs
Publication statusPublished - 1 Aug 2019

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