Eccentric compression performance of slender L-shaped column composed of concrete-filled steel tubes connected by steel linking plates

The post-fire axial compressive behavior of a set of steel fiber reinforced ceramsite concrete filled steel tubular short columns (noted as SFCC-SSC) was experimentally studied. Effect of the maximum value of fire response temperatures of the specimens and some parameters on the axial compression performance of the specimens was especially discussed. The results show that the surface of the steel tubes after fire presented dark red for 700°Cof furnace temperature and orange red for 900°C, and there was no obvious descending segment in post-fire load-displacement curves of the most specimens subjected to fire load. It was concluded that the axial bearing capacity of the specimens aftersuffering the furnace temperature of 900°C is much less than that of the specimens not subjected to fire load, and the volume of steel fiber of 0.5% of has the greatest effect on post-fire bearing capacity of specimens of SFCC-SSC.

Download Full-text

Research on the Load Capacity of Separation Concrete-Filled Steel Tubes Subjected to Eccentric Compression on Separation Side

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.168-170.632 ◽

2010 ◽

Vol 168-170 ◽

pp. 632-636 ◽

Cited By ~ 1

Author(s):

Xia Ping Liu ◽

Shu Tang ◽

Chun Hui Tang ◽

Zuo Yong Yang ◽

Zuo Sun

Keyword(s):

Ultimate Load ◽

Load Capacity ◽

Eccentricity Ratio ◽

Steel Tubes ◽

Ultimate Load Capacity ◽

Short Columns ◽

Separation Ratio ◽

Eccentric Compression ◽

Experimental Parameters ◽

Concrete Filled Steel Tubes

This paper deals with the ultimate load capacity test on 14 short columns of separation concrete-filled steel tubes (CFST) which are subjected to the eccentric compression on separate side. The experimental parameters include the separation ratio and the eccentricity ratio. The result shows that the separation ratio and the eccentricity ratio will influence the load capacity of the components of the concrete-filled steel tubes which are subjected to the eccentric compression. The confinement of steel tubes to core concrete will be continuously weakened and the ultimate load capacity of the components will be decreased obviously with both the separation ratio and the eccentricity ratio increasing gradually.

Download Full-text

Research on Mechanical Properties of Separation Concrete-Filled Steel Tubes Subjected to Eccentric Compression on Non-Separation Side

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.117-119.887 ◽

2011 ◽

Vol 117-119 ◽

pp. 887-892 ◽

Cited By ~ 4

Author(s):

Xia Ping Liu ◽

Zhuo Sun ◽

Hai Yun Huang ◽

Shu Tang ◽

Chun Hui Tang

Keyword(s):

Mechanical Properties ◽

Load Capacity ◽

Eccentricity Ratio ◽

Steel Tubes ◽

Ultimate Load Capacity ◽

Whole Process ◽

Short Columns ◽

Separation Ratio ◽

Eccentric Compression ◽

Concrete Filled Steel Tubes

This document deals with the whole process compression model test on 12 short columns of separation concrete-filled steel tubes (CFST) which are subjected to eccentric compression on the non-separation side. The experimental parameters include the separation ratio and the eccentricity ratio. The results show that the separation ratio and the eccentricity ratio will influence CFST components’ mechanical properties which contain the relationship of load-strain amd load-deformation, that especially embodied in the nonlinear stage. When compressed on non-separation side, the confinement of steel tubes to core concrete will be continuously weakened and the ultimate load capacity of the components will be decreased obviously with both the separation ratio and the eccentricity ratio increasing gradually. But it less serious which compare with that compressed on separation side.

Download Full-text

Experimental Behaviour of Concrete Filled Steel Tubes (CFST) with Initial Concrete Imperfection Subjected to Eccentric Compression

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.174-177.35 ◽

2012 ◽

Vol 174-177 ◽

pp. 35-38

Author(s):

Fei Yu Liao ◽

Yong Jin Li

Keyword(s):

Ultimate Strength ◽

Steel Tube ◽

Steel Tubes ◽

Concrete Core ◽

Spherical Cap ◽

Eccentric Compression ◽

Gap Ratio ◽

Cfst Columns ◽

Concrete Filled Steel Tubes ◽

Experimental Behaviour

Gap between steel tube and concrete core could be recognized as a type of initial concrete imperfection in concrete-filled steel tubular (CFST) members. This paper is an attempt to study the effect of gap on the behaviour of concrete-filled steel tubular (CFST) columns subjected to eccentric compression. A total 14 specimens were tested and the main parameters were the gap type (circumferential gap and spherical-cap) and gap ratio. The influence of gap on the failure mode and ultimate strength of CFST columns were experimentally examined.

Download Full-text