A Study On Performance Evaluation Of Steel Tubular Columns Infilled With Concrete By ANSYS

Abstract

The behaviour of steel tubular section filled with concrete CFST is analysed using finite element software ANSYS
& Experimental results. The present study is an attempt to understand the failure load of steel tubular section filled with
concrete column under axial loading for different shapes such as circular and rectangular. In this project modelling of
various circular cross section of column is been simulated nonlinearly by finite element method. Models are to be loaded in a
concentric axial compression by Universal Testing Machine, and the failure loads are to be extracted. All models to be
simulated have length to diameter ratio (L/D) not exceeding the value of 4.5 to act as short column and therefore no
slenderness would be taken in to account. Failure loads calculated by ANSYS are compared with the results obtained from
experimental results. The present study is an attempt to understand the behavior of Concrete filled steel tubular column under
axial load. A concrete-filled steel tubular (CFST) column is formed by filling a steel tube with concrete. It is well known that
concrete-filled steel tubular (CFST) columns are currently being increasingly used in the construction of buildings, due to
their excellent static and earthquake-resistant properties, such as high strength, high ductility, large energy absorption
capacity, bending stiffness, fire performance along with favorable construction ability etc. Recently, the behavior of the CFST
columns has become of great interest to design engineers, infrastructure owners and researchers, therefore to understand the
load deformation characteristics of composite columns critically, numerical finite element analysis using software package
ANSYS is carried out in this paper. This paper focuses on modeling of concrete filled steel tube (CFST) column under axial
loading. The development of high rise buildings and the need to provide more rigid structural systems to sustain severe
lateral loads due to seismic and wind conditions lead to the necessity for mixed steel and concrete systems. This leads to the
invention of
CFST (Concrete Filled Steel Tubular Columns). CFST is component with good performance resulting from the confinement
effect of steel with concrete core and design
versatility. From experimental and numerical analysis have slight differences in deflection values. The concrete filled steel
tubular column of shorter length shows better performance than that of concrete filled steel tubular column of larger length.
Increased cross sectional area of tube causes less deflection, this type of CFST having better load carrying capacity. The
CFST of shorter length shows better performance than that of concrete filled steel tubular column of larger length. Increased
cross sectional area of tube causes less deflection .This type of CFST having better load carrying capacity. CFST column with
wire mesh have better load carrying capacity compared to other CFST column, if any increment in height of the column.