Analytical and Numerical Study of Concrete Filled Tabular Columns

Abstract

Concrete filled steel tabular columns have gained immense importance in recent decades due to numerous structural benefits especially in developed countries like china, Japan, U.S.A, Britain. In this paper analytical equations are put to understand the mechanism of concrete filled tabular columns under axial loading. For this purpose a comparison between design codes Eurocode-4, and AISC-LRFD has been made in evaluating the axial compressive strength of concrete filled tabular columns. This study further presents a numerical investigation in to the behavior of concrete filled tabular columns using three dimensional nonlinear finite element software ABAQUS 6.13. The proposed finite element model is validated by comparing its results with those of the corresponding experimental specimens. The analytical results obtained are compared with the numerical results obtained from ABAQUS. Both square and circular concrete filled tabular columns having steel tubes of different geometries and infilled with different grades of concrete chosen from the literature are analyzed and the predicted axial strength obtained from different codes and by finite element analysis are compared. In this study 10rectangular specimens and 4 circular are analyzed.

Capacidade resistente de pilares mistos preenchidos sob flexocompressão

“…Os primeiros documentos relatando estudos de pilares mistos preenchidos foram divulgados na década de 1960 (KNOWLES;PARK, 1969) e trazem resultados de ensaios realizados com elementos submetidos a compressão centrada. Desde então, vários estudos teóricos e experimentais vêm sendo realizados; como exemplos citam-se Uy (1998), Hu et al (2003), Sakino et al (2004), Wang et al (2012) e Hafiz (2016). Porém, somente a partir da década de 1990 é que são divulgados os primeiros estudos voltados para a modelagem numérica desses elementos estruturais.…”

Archives of Civil Engineering

“…steel yielding or concrete crushing), the CFHS stub column reaches its ultimate capacity, at which point both the concrete core and steel section reach their strength limits. Hafiz [2] examined the experimental and numerical simulation results and found that a CFHS column under axial compression load is not affected by a change in length. The experimental results may be primarily influenced by the confinement effect and the contribution of the steel section [3].…”