Coupled ultimate capacity of CFRP confined concrete-filled steel tube columns under compression-bending-torsion load

Structures ◽  
2021 ◽  
Vol 31 ◽  
pp. 558-575
Author(s):  
Yu-Hang Wang ◽  
Yu-Yan Wang ◽  
Xu-Hong Zhou ◽  
Ran Deng ◽  
Yong-Sen Lan ◽  
...  
Keyword(s):  
Steel Tube ◽  
Confined Concrete ◽  
Ultimate Capacity ◽  
Concrete Filled Steel Tube

Study on Stress-Strain Relationship of FRP-Confined Concrete Filled Steel Tubes

2010 ◽  
Vol 163-167 ◽  
pp. 3826-3829
Author(s):  
Feng Yu ◽  
Ping Wu
Keyword(s):  
Main Parameter ◽  
Steel Tube ◽  
Confined Concrete ◽  
Stress Strain ◽  
Steel Tubes ◽  
Concrete Filled Steel Tube ◽  
Strain Relationship ◽  
Relationship Of ◽  
Concrete Filled Steel Tubes ◽  
Strain Model

FRP-confined concrete filled steel tube may fully use the character of FRP-confined concrete and concrete filled steel tube. Based on the analysis of existing experimental data, the formula of ultimate bearing capacity of FRP-confined concrete filled steel tube is proposed. The mechanical behavior of FRP-confined concrete filled steel tube is mainly related to the equivalent confinement effect coefficient before the rupture of FRP. Based on the static equilibrium condition, the equivalent conversion section is adopted; taking as main parameter, the simplified stress-strain model of FRP-confined concrete filled steel tube is established. The predictions of the model agree well with test data.

The Influence of Bearing Capacity of Self-Stressed CFST Members for Different Strength Grades and Self-Stressed Magnitudes of Concrete

2012 ◽  
Vol 174-177 ◽  
pp. 1546-1551 ◽  
Author(s):  
Shui Xing Zhou ◽  
Yue Ma ◽  
Dong Sheng Sun ◽  
Lu Li ◽  
Cheng Wu
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Concrete Strength ◽  
Steel Tube ◽  
The Self ◽  
Confined Concrete ◽  
Constitutive Relationship ◽  
Unified Theory ◽  
Concrete Filled Steel Tube ◽  
Relationship Model

According to the unified theory of general concrete filled steel tube, this paper puts forward a constitutive relationship model of the self-stressed concrete filled steel tube, which was verified by experiments and finite element methods. On the basis of the above, the influences on the bearing capacity of self-stressed CFST members were analyzed about the strength grades and magnitudes of self-stress of confined concrete. The results show that the bearing capacity of the self-stressed concrete filled steel tube members will be improved with the increase of the magnitudes of self-stress and concrete strength grades. Compared to the general CFST in the same condition, the maximum of the bearing capacity can be approximately enhanced 20%.

Analysis and Summary of Characteristics of Confined Concrete

2012 ◽  
Vol 174-177 ◽  
pp. 330-335
Author(s):  
Yun Da Shao ◽  
Hong Guo
Keyword(s):  
Bearing Capacity ◽  
Steel Tube ◽  
Confined Concrete ◽  
Concrete Filled Steel Tube ◽  
Capacity Model

Characteristics and constraint mechanism of concrete confined by ties,concrete filled steel tube,FRP-strengthened concrete were summed up in this paper,and unified bearing capacity model for confined concrete was also introduced,then several new kinds of confined concrete forms were outlined,finally the development and application of confined concrete were prospected.

scholarly journals Bearing capacity calculation of eccentrically compressed concrete filled steel tube columns taking into account non-linear diagrams of materials

2021 ◽  
Vol 18 (1) ◽  
pp. 36-45
Author(s):  
A. A. Vedernikova ◽  
◽  
Eh. K. Opbul ◽  
Keyword(s):  
Bearing Capacity ◽  
Compressive Force ◽  
Steel Tube ◽  
Confined Concrete ◽  
Tube Steel ◽  
Deformation Model ◽  
Practical Calculation ◽  
Nonlinear Method ◽  
Concrete Filled Steel Tube ◽  
Maximum Curvature

The article provides an example of practical calculation of eccentrically compressed steel tube confined concrete using a nonlinear deformation model taking into account the standard deformation diagrams of materials. The calculation was performed on the example of a test specimen made of concrete filled steel tube (steel tube confined concrete) using the method of sequential approximation based on iterative procedures. The nonlinear method is aimed at making deformation assessment of the element bearing capacity by searching for the calculated deformation at particular points of the normal section at its maximum curvature and comparison with the standard admissible values. The task of iterative calculations is assessing the value of the maximum curvature of eccentrically compressed steel tube confined concrete which is under the action of a longitudinal compressive force. The basic calculation formulas are given. Comparison with the results of numerical and analytical calculations has shown a good convergence.

scholarly journals Behavior of FRP-Confined Concrete-Filled Steel Tube Columns

Polymers ◽  
2014 ◽  
Vol 6 (5) ◽  
pp. 1333-1349 ◽  
Author(s):  
Yiyan Lu ◽  
Na Li ◽  
Shan Li
Keyword(s):  
Steel Tube ◽  
Confined Concrete ◽  
Concrete Filled Steel Tube
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