Experimental Study on FRP–Reinforced Concrete–Steel Double-Skin Tubular Columns under Eccentric Compression Loads

2021 ◽  
Vol 25 (6) ◽  
pp. 04021051
Author(s):  
Haiyang Gao ◽  
Lianguang Wang ◽  
Ni Zhang
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Tubular Columns ◽  
Eccentric Compression ◽  
Double Skin

scholarly journals Behavior of concrete-filled double skin steel tubular columns under eccentric compression after fire

2018 ◽  
Author(s):  
Xiao Liu ◽  
Jianye Xu ◽  
Bing Wang
Keyword(s):  
Full Range ◽  
Element Analysis ◽  
Steel Ratio ◽  
Tubular Columns ◽  
Eccentric Compression ◽  
Fea Modeling ◽  
The Finite Element Analysis ◽  
Double Skin ◽  
Good Agreement ◽  
Eccentric Distance

Abstract: To analysis the behavior of the mechanical properties of concrete-filled double skin steel tubular (CFDST) columns under eccentric loads after fire, the finite element analysis was used. The established FEA modeling was verified by the experimental results which has a good agreement. The FEA modeling was then used to perform the temperature field and the full-range load-deformation relations of the CFDST subject to eccentric compression after exposed to fire. The results indicate that: with the time of fire increasing, the eccentric distance increasing, the steel ratio decreasing, the yield strength decreasing and compressive strength decreasing, the bearing capacity of CFDST in circle section under eccentric loads is showing a decrease trend, and the stiffness of component decreases with the time of fire increasing, the eccentric distance increasing and the steel ratio decreasing. The ductility of CFDST became better with the time of fire increasing and the eccentric distance increasing.

Experimental Study on Concrete-Filled Steel Tubular with External Octagon Steel Tube and Inner Circle PVC-U Pipe under Axial Compression

2011 ◽  
Vol 368-373 ◽  
pp. 511-514
Author(s):  
Wei Bin Yuan ◽  
Shi Long Ma
Keyword(s):  
Experimental Study ◽  
Numerical Analysis ◽  
Axial Load ◽  
Slenderness Ratio ◽  
Steel Tube ◽  
Cross Sectional ◽  
Tubular Columns ◽  
Cross Sectional Size ◽  
Double Skin ◽  
Core Concrete

An investigation of the octagon-shaped concrete-filled double skin steel tubular columns which used PVC-U pipe to replace the steel tube as inner tube was carried out. In order to study the performances and mechanisms of the components when suffered axial load, ultimate axial bearing capacities of 9 components were tested. The cross-sectional size of the outer steel tube and inner PVC-U pipe and length of the specimen was concerned by the nominal steel ratio and the hollow ratio and slenderness ratio, respectively. The external steel tube and core concrete appeared three and four types of destruction phenomenons, respectively, but the inner PVC-U pipe did not destroy. Finally, experimental results and numerical analysis results were comparied.

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