Reference Type:  Journal Article
Record Number: 1
Author: Fu, Z. Q., Ji, B. H., L. Lv and Zhou, W. J.
Year: 2010
Title: Behavior of lightweight aggregate concrete filled steel tubular slender columns under axial compression
Journal: Advanced Steel Construction
Volume: 7
Issue: 2
Pages: 13
Start Page: 144
Short Title: Behavior of lightweight aggregate concrete filled steel tubular slender columns under axial compression
DOI: 10.18057/IJASC.2011.7.2.2
Keywords: Lightweight aggregate concrete filled steel tube; axial compressed test; slenderness ratio; stability coefficient; bearing capacity
Abstract: Based on axially compressive tests on 6 short columns and 27 slender columns of lightweight aggregate concrete filled steel tube (LACFST)，macroscopic deformation characters，axial force-longitudinal strain curves，failure mode and failure mechanism are studied. The results are also compared with these of the normal concrete filled steel tube. The test results demonstrated that slenderness ratio is the main influence factor to the behavior of LACFST long columns under axial load. The greater the slenderness ratio is, the lower the ultimate bearing capacity and stability coefficient of the specimen are, and the performances of core concrete affect the stability behavior of lightweight aggregate concrete and normal concrete filled steel tube long columns. The stability coefficient of specimens is determined by the peak strain of concrete and unrelated to the peak strength of concrete. The stability coefficient increases when the peak strain of concrete increasing. Comparison results show that calculation formula in Europe code EC4 (1996) can be applied to calculate the bearing capacity of LACFST columns under axially compressive load.
Author Address: Professor, College of Civil and Transportation Engineering, Hohai University, Xikang Road 1#, Nanjing, Jiangsu, P.R. China 210098