Investigation of Design Specifications for Compressive Strength of Concrete-Filled Steel Tube Columns

2021 ◽  
Vol 33 (6) ◽  
pp. 383-394
Author(s):  
Ho Ryong Kim ◽  
Sung Bo Kim
Keyword(s):  
Compressive Strength ◽  
Steel Tube ◽  
Concrete Filled Steel Tube ◽  
Design Specifications ◽  
Compressive Strength Of Concrete

Experimental Study on Compressive Bearing Capacity of High Strength Concrete-Filled Steel Tube Composite Columns

2011 ◽  
Vol 368-373 ◽  
pp. 410-414 ◽  
Author(s):  
Hong Zhen Kang ◽  
Lei Yao ◽  
Xi Min Song ◽  
Ying Hua Ye
Keyword(s):  
Compressive Strength ◽  
Reinforced Concrete ◽  
High Strength Concrete ◽  
High Strength ◽  
Steel Tube ◽  
Test Results ◽  
Concrete Filled Steel Tube ◽  
Composite Columns ◽  
Strength Concrete ◽  
Axial Compressive Strength

To study axial compressive strength of high strength concrete-filled steel tube composite columns, tests of 18 specimens were carried out. Parameters of the specimens were the confinement index of concrete-filled steel tube, the cubic strength and the stirrup characteristic value of concrete outer of steel tube. Test results show that the concrete-filled steel tube and the reinforced concrete deformed simultaneously in the axial direction before and at the peak value of axial compressive force; after failure of the reinforced concrete, the concrete-filled steel tube can still bear the axial load and deformation; the main influential factors of axial compressive capacity are confinement index, the cubic strength and the stirrup characteristic value of concrete outer of steel tube. The accuracy of the formula of axial compressive strength of composite columns provided by CECS 188:2005 is proved by the test results of this paper.

scholarly journals Numerical Study of Circular Concrete Filled Steel Tubes Subjected to Pure Torsion

Buildings ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 397
Author(s):  
Khanh Ba Le ◽  
Vui Van Cao
Keyword(s):  
Compressive Strength ◽  
Parametric Study ◽  
Numerical Study ◽  
Steel Tube ◽  
Torsional Moment ◽  
Pure Torsion ◽  
Steel Tubes ◽  
Moment Capacity ◽  
Compressive Strength Of Concrete ◽  
Concrete Filled Steel Tubes

This study numerically explored the torsional behavior of circular concrete-filled steel tubes (CFST) under pure torsion. Numerical models of CFSTs were developed in ABAQUS. The models were validated by comparing with the experimental results available in the literature; then, these models were used for parametric study. Based on the obtained results, the mechanism of torsional moment transferring from steel plates to CFST was presented. The results obtained from the parametric study indicated that the compressive strength of concrete marginally improved the torsional moment capacity of the CFST while concrete prevented buckling and helped the steel tubes to work more effectively. The steel strength significantly affected the torsional moment capacity of the CFST. When the yield strength of steel increased from 235 to 420 MPa, the yield torsional moment of the CFST increased by approximately 50%. The yield torsional moment capacity of the steel tube had the strongest correlation with the yield moment of the CFST, followed by the ratio of diameter to thickness of the steel tube while the parameters related to the compressive strength of concrete exhibited a poor correlation with the yield torsional moment.

scholarly journals A Simple Formula for Prediction of Compressive Strength of Square CFT Columns

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Muhammad Aun Bashir
Keyword(s):  
Finite Element ◽  
Compressive Strength ◽  
Composite Structures ◽  
Slenderness Ratio ◽  
Steel Tube ◽  
Experimental Results ◽  
Simple Equation ◽  
Material Strength ◽  
Concrete Filled Steel Tube ◽  
Short Columns

Concrete filled steel tube structures are becoming very popular in the modern civil engineering projects. Studying composite structures is useful, since it is an innovative and contemporary way to build structures. This type of structure has the ability to use respective strength of both steel and concrete due to confinement. Prefabrication of steel tube section is beneficial, and allows rapid installation into main structure. It also reduces the assembly cost and construction time. This paper will present the simple equation to predict the compressive strength of square concrete filled steel tube by using Finite Element Analysis (FEA)based software ABAQUs. In this study, 3D non-linear finite element models of short square composite columns were prepared using ABAQUS. The results were compared with published experimental tests of a concrete filled steel tube short columns. After getting the good agreement with the experimental results, a simple equation for the prediction of compressive strength is presented by considering the width to thickness ratio of steel tube. Results are validated with experimental results. The equation can predict the compressive strength only for the given material strengths and in future, the simple equation can be improved by considering different parameters e.g. material strength, slenderness ratio and end conditions.

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