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JOURNAL OF FACULTY OF CIVIL ENGINEERING
INTERNATIONAL CONFERENCE
CONTEMPORARY ACHIEVEMENTS IN CIVILENGINEERING 25, 2014.y., pp. 167-174


INELASTIC ANALYSIS OF COLD-FORMED EHST COLUMNS UNDER ECCENTRIC LOADING
 
DOI: 10.14415/konferencijaGFS2014.022
UDC: 624.166:519.6
CC-BY-SA 4.0 license
Author : Bavan, Ma; Baharom, Shahrizan
 
 Summary:
 This paper discusses the deviancy of the ultimate axial load in the consideration of eccentric loading in terms of differing flexural rigidities by two primary axes of the Elliptical Hollow Steel Tubular (EHST) columns. A non-linear finite element (FE) model of EHST column with three dimensional solid elements and with discrete rigid ended plates was developed, and centrically loaded. The axial load and shortening responses were predicted and compared with experimental analysis. A good agreement was examined between the responses of FE model and experimental analysis found in the literature. The validated FE model was then extended with parametric studies on eccentric loadings by both axes. The failure criteria due to the stresses developed by external load is described with stress resultants in each case by considering the axial force induced by centric loading, and axial force and bending moment induced by eccentric loading in both axes. The failure criteria of the columns were determined in terms of local buckling, flexural buckling and material yielding. In addition, interaction diagram between moments induced by both axes with ultimate axial load is discussed and strengthening methods are also suggested.
 
 Keywords:
 Elliptical hollow Steel tubular columns, Finite element analysis, Combined moment and axial load, Failure criteria, Interaction diagram