Study of Concrete Filled Coldformed Corrugated Steel Tubular Columns under Axial Loading

2019 ◽  
Author(s):  
Aswathy K P ◽  
Rajesh K N
Keyword(s):  
Axial Loading ◽  
Tubular Columns

Structural behaviour of geopolymeric recycled concrete filled steel tubular columns under axial loading

2015 ◽  
Vol 81 ◽  
pp. 187-197 ◽  
Author(s):  
Xiao-Shuang Shi ◽  
Qing-Yuan Wang ◽  
Xiao-Ling Zhao ◽  
Frank G. Collins
Keyword(s):  
Axial Loading ◽  
Recycled Concrete ◽  
Structural Behaviour ◽  
Tubular Columns

Effects of Hollowness on Strength of Double Skinned Concrete Filled Steel Tubular Columns of Different Geometries under Axial Loading

2011 ◽  
Vol 94-96 ◽  
pp. 1746-1751
Author(s):  
Naseem Baig Muhammad ◽  
Jian Sheng Fan ◽  
Jian Guo Nie
Keyword(s):  
Axial Loading ◽  
High Strength ◽  
External Pressure ◽  
Strength Increase ◽  
Geometric Shapes ◽  
Composite Columns ◽  
Tubular Columns ◽  
Section Modulus ◽  
Conservative Values ◽  
Rc Bridge Columns

Concrete filled tubular columns (CFT) have been used in buildings and bridges since long in history, and research reported in china is since 1970s. It has become popular as structural members due to their excellent structural performance characteristics, which include high strength, stiffness and high ductility. In modern building construction, steel rectangular hollow sections (RHS), square hollow sections (SHS) and circular hollow sections (CHS) are often filled with concrete to form a composite column. Such composite columns are well recognized in view of their high load carrying capacity, fast construction, small cross section, and high fire resistance. Compared to concrete-filled steel tubular (CFT) columns, the DSCFT can reduce its own weight while have a high flexural stiffness. Compared to traditional RC bridge columns and CFT columns it has high bending stiffness, avoids instability under external pressure, is light weight, possesses good damping characteristics due to increase in section modulus. In present study it is found that there is a definite increase in strength. Circular columns had all the properties better than other geometric shapes; strength increase was almost 20 % as compared to square columns. It is expected that if same ratios are maintained at projected scale, there would be a definite increase in strength and behavior of the columns. New concept of hollowness introduced is valid for all geometric shapes in DSCFTs and gives fairly good idea about its limits and effects on strength of columns. The equations given in different design codes give conservative values and hence need to be revised for DSCFTs both for seismic and normal designs.

scholarly journals Numerical Modeling of Square Steel Members Wrapped by CFRP Composites

2019 ◽  
Vol 8 (10) ◽  
pp. 3082-3087 ◽  
Keyword(s):  
Failure Modes ◽  
Ultimate Load ◽  
Local Buckling ◽  
Axial Loading ◽  
Test Results ◽  
Structural Members ◽  
Cfrp Sheets ◽  
Tubular Columns ◽  
Steel Members ◽  
Strain Behaviour

HSS (Hollow Structural Steel) tubular members used in buildings and bridges for structural application is rapidly developing technique in the recent era. Since, they have many advantages over RC structural members. This paper presents the application of CFRP on HSS tubular members under axial compression. Typical failure occurred during axial loading was local buckling, and this could be reduced by wrapping CFRP sheets around the HSS tubular columns were investigated experimentally. Eight steel samples are used in this test. Among eight specimens, two are unwrapped and the remaining six columns are externally wrapped by CFRP. CFRP sheets are used as strips, and the width of the sheets are constant. The spacing between the CFRP sheets is also constant. All columns are tested in column tester till the maximum to understand their failure modes, Ultimate load, load Vs. Displacement, Stress- Strain behaviour and Ductility index. Finally, results obtained from the experimental investigation could be validated with ANSYS software. The ultimate load and displacements from ANSYS validation are closely match with test results.

Parametric Studies of Semi-Rigid Flush End Plate Joints with Concrete-Filled Steel Tubular Columns

2014 ◽  
Vol 553 ◽  
pp. 588-593
Author(s):  
Abdolreza Ataei ◽  
Mark A. Bradford
Keyword(s):  
Concrete Slab ◽  
Axial Loading ◽  
Bending Moment ◽  
Careful Consideration ◽  
Computational Techniques ◽  
Structural Behaviour ◽  
Tubular Columns ◽  
Shear Connection ◽  
Parametric Studies ◽  
Constitutive Components

A semi-rigid beam-to-column composite blind bolted connection is modelled using ABAQUS software. The mechanics of this innovative joint considered in the paper requires careful consideration in order to capture the response accurately using computational techniques. The composite beam is connected to a concrete-filled square column using blind bolts, and the model simulates a connection in hogging bending moment. Partial shear connection is considered, as well as the non-linear material properties and geometry of all of the constitutive components. All connection components were taken as being the same size as used in the experiments against which the method is calibrated, and furthermore the model does not need recourse to empirical push-out test data. The technique can be used to model the connections easily, resulting in rapid and reliable solutions. Using the numerical model which is calibrated accurately against experimental test results, a parametric study is carried out to investigate the pertinent parameters such as the reinforcement ratio, axial loading in the column, thickness of the concrete slab, degree of the shear connection, diameter of the blind bolts and the pretension force in them on the structural behaviour of this innovative type of joint. Based on the parametric studies, recommendations for the design of this kind of structural joint are given.

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