期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2015
卷号：4
期号：2
页码：185
DOI：10.15680/IJIRSET.2015.0402042
出版社：S&S Publications
摘要：The structural behaviour of concrete - filled steel tube (CFST) columns has been investigated usingexperimental and analytical studies. The effect of concrete compressive strength, thickness of steel tube, stiffeners andlongitudinal reinforcement were considered. Specimens that have been studied consist of sixteen square samples withdimensions of 150 mm ×150 mm × 300 mm height, and fifteen circular samples of 150 mm diameter and height of 300mm. The tested samples were studied analytically using three dimensional finite element representation by ANSYS(ver. 12.1) computer program. Eight nodes brick elements SOLID 65 and SOLID 45 were used to simulate concreteand steel tube respectively. While two nodes element LINK 8 are used for steel rebar.The results obtained from finite element solution shows that, the convergence between analytical and experimentalfailure load varied from 2 to 15 %. While the effect of compressive strength of concrete on columns havingwidth/thickness (b/t) or diameter/thickness (d/t) 37.5 is greater than columns which have (b/t) or (d/t) 50.Deformations of columns filled with normal concrete (25 MPa) are larger than those of columns filled with highstrength concrete (60MPa). The effect of width-thickness (b/t) and diameter/thickness (d/t) ratio on the ultimatestrength of (CFST) columns will have a reverse action, when of (b/t) or (d/t) decreases the caused increasing inultimate load capacity of columns which is varied from 4.47 to13.37 % for square samples varied from 8.00 to 12.14%for circular samples depending on the type of stiffened, compressive strength of concrete and ratio of (b/t) and (d/t).
