Axial Loading Behaviour of Concrete Filled Steel Tube (CFST) Columns: A Parametric Study

2021 ◽  
pp. 873-883
Author(s):  
Aditya Kumar Tiwary ◽  
Ashok Kumar Gupta
Keyword(s):  
Parametric Study ◽  
Axial Loading ◽  
Steel Tube ◽  
Concrete Filled Steel Tube ◽  
Cfst Columns

scholarly journals Nonlinear Analysis of Circular Concrete Filled Steel Tube Columns under Axial Loading

2019 ◽  
Vol 8 (12) ◽  
pp. 688-692
Keyword(s):  
Carrying Capacity ◽  
Axial Loading ◽  
Steel Tube ◽  
Load Carrying Capacity ◽  
Building Structures ◽  
Inelastic Behavior ◽  
Concrete Filled Steel Tube ◽  
Load Carrying ◽  
Cfst Columns ◽  
Von Mises

Concrete filled steel tube (CFST) columns are composite member mainly consists of concrete infilled in steel tube. In current construction industry, CFST columns are preferred to provide lateral resistance in both unbraced and braced building structures. In this paper, finite element studies were carried out on concrete filled steel tube columns under an axial composite loading by using ABAQUS/CAE. The inelastic behavior of concrete and steel tube was defined to the model by using concrete damaged plasticity model (CDP) and Johnson-cook model respectively which is available in ABAQUS/CAE. The diameters of columns were considered as 100 mm, 125 mm and 150 mm, whereas the length of columns was kept constant, i.e. 600 mm for all models. The thickness of steel tube was considered as 4 mm and 5 mm for all diameters of columns. The concrete infilled of grade M30 was used in this study. The simulations were carried out against composite loading to study the response of CFST columns in terms of load carrying capacity, displacement and von-mises stresses. The mesh conversion study was also carried out to obtain the best size of mesh corresponding to the experimental load carrying capacity of CFST columns

scholarly journals Experimental Investigation on the Axially Loaded Performance of Notched Hexagonal Concrete-Filled Steel Tube (CFST) Column

2019 ◽  
Vol 2019 ◽  
pp. 1-9
Author(s):  
Jing Liu ◽  
Zhe Li ◽  
Fa-Xing Ding
Keyword(s):  
Ultimate Strength ◽  
Axial Loading ◽  
Steel Tube ◽  
Notched Specimen ◽  
Concrete Filled Steel Tube ◽  
Static Performance ◽  
Notch Length ◽  
Notch Orientation ◽  
Cfst Columns ◽  
Stub Columns

This study aimed to investigate the static performance of notched hexagonal concrete-filled steel tube (CFST) stub columns through axial loading. Notch length, notch location, and notch direction in 14 CFST stub columns were experimentally studied. Stress process, failure mechanism, and ultimate strength in the notched CFST columns were analyzed. Results show that notches in steel tubes can weaken the restraining effect of steel pipes on core concrete and induce a decrease in the ultimate strength of specimens. The failure mode of components is greatly affected by notch orientation. The notch is closed under axial compression in the horizontally notched specimen, and the slotting indicates outward buckling in the vertically notched specimen. Based on the test results, a method for calculating the ultimate strength of notched hexagonal CFST columns was established. This research encourages the extensive application of these structures in civil engineering.

scholarly journals Effect of Concrete Age and Creep on the Behavior of Concrete-Filled Steel Tube Columns

2016 ◽  
Vol 2016 ◽  
pp. 1-10
Author(s):  
HaiYang Wang ◽  
XiaoXiong Zha ◽  
Wei Feng
Keyword(s):  
Numerical Models ◽  
Axial Loading ◽  
Steel Tube ◽  
Test Results ◽  
Empirical Formulas ◽  
Steel Tubes ◽  
Load Bearing Capacity ◽  
Concrete Filled Steel Tube ◽  
Practical Design ◽  
Cfst Columns

The influence of concrete age and creep on the ultimate axial loading capacity of concrete-filled steel tube (CFST) columns is experimentally and numerically investigated. After validation of numerical models, a parametric study is conducted and the results are used to formulate empirical formulas for predicting the ultimate axial load-bearing capacity of the columns. Formulas are also proposed for predicting both the composite creep and aging coefficients of the CFST columns, which consider the confinement action of steel tubes on concrete. Then, the proposed formulas are validated independently by comparing their predictions with existing test results performed by other researchers. The comparisons show that the empirical formulas have the potential to be used in the practical design of CFST columns.

On Deformation Charting for Concrete Filled Steel Tube Columns Concrete Core and Steel Shell

2018 ◽  
Vol 878 ◽  
pp. 126-131 ◽  
Author(s):  
Anatoly L. Krishan ◽  
Elvira P. Chernyshova ◽  
Rustam R. Sabirov
Keyword(s):  
Steel Tube ◽  
Steel Shell ◽  
Concrete Core ◽  
New Approach ◽  
Concrete Filled Steel Tube ◽  
The Real ◽  
Side Pressure ◽  
Core Function ◽  
Cfst Columns ◽  
Major Factors

New approach to creating deformation charts for concrete core and steel shell of round CFST columns is offered. For creating such charts the power resistance of short central the compressed concrete filled steel tube element is considered. At the same time two major factors are considered. First, the steel shell and the concrete core function under conditions of complex tension. Secondly, at step-by-step strengthening of axial deformations the side pressure upon concrete core and steel shell constantly changes. As a result coordinates of parametrical points of deformation charts for concrete and steel change. Such approach allows describing the real intense deformed condition of concrete filled steel tube columns more precisely.

scholarly journals Influence of Lateral Monotonic Loading Upon the Behaviour of Rubberized Concrete Filled Steel Tube

2020 ◽  
Vol 13 (5) ◽  
pp. 193-198
Author(s):  
Abdullah Al-Shwaiter ◽  
◽  
Hanizam Awang ◽  
Ziyad Al-Gaboby
Keyword(s):  
Slenderness Ratio ◽  
Axial Loading ◽  
Major Effect ◽  
Steel Tube ◽  
Monotonic Loading ◽  
Rubberized Concrete ◽  
Plastic Properties ◽  
Concrete Filled Steel Tube ◽  
Strength Capacity ◽  
Adopted Model

Using waste tyres as recycle material in the construction industry seems to be a good solution to the problem of waste management and landfill. The main purpose of this paper is to study the behaviour of rubberized concrete-filled steel tube (RuCFST) analytically for square and rectangular columns under lateral monotonic loading. Seventy-two prototypes modelled using ABAQUS 6.12-1 software with various variables, which are cross-section shape, rubber replacement as a percentage of natural aggregate, column length, sections slenderness ratio and the axial loading level. The results showed that the adopted model in elastic and plastic properties gives a good agreement between numerical and referenced experimental results. Moreover, increasing the rubber replacement percentage has no major effect on the columns’ capacity; meanwhile increasing the columns’ length lead to decrease the strength capacity dramatically. Furthermore, increasing the axial loading percentage leads to reduce the column lateral strength. Similarly, the columns’ capacity decreases with increasing the section slenderness ratio.

scholarly journals Investigation of the effect of impact load on concrete-filled steel tube columns under fire

2020 ◽  
Vol 14 (54) ◽  
pp. 317-324
Author(s):  
Ali Golsoorat Pahlaviani ◽  
Ali Mohammad Rousta ◽  
Peyman Beiranvand
Keyword(s):  
Impact Load ◽  
High Strength ◽  
Concrete Columns ◽  
Steel Tube ◽  
Lateral Impact ◽  
Concrete Filled Steel Tube ◽  
Axial Strength ◽  
High Rise ◽  
Working Space ◽  
Cfst Columns

Concrete-filled steel tube (CFST) columns are increasingly used in the construction of high-rise buildings which require high strength and large working space especially at lower stories. As compared to reinforced concrete columns, existence of the exterior steel tube not only bears a portion of axial load but also most importantly provides confinement to the infill concrete.with the confinement provided by the steel tube, axial strength of the infill concrete can be largely enhanced.this paper presents the investigation effect of impact load on concrete-filled steel tube columns under fire by numerical simulations using ABAQUS software.the results indicate that the CFST sections with larger confinement factor ξ=1.23 behaved in a very ductile manner under lateral impact. And the sections with smaller confinement factor ξ=0.44  generally behaved in a brittle mechanism.

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