Comparative study on structural behaviour of circular and square section-Concrete Filled Steel Tube (CFST) and Reinforced Cement Concrete (RCC) stub column

Structures ◽  
2021 ◽  
Vol 29 ◽  
pp. 2067-2081
Author(s):  
Gosala Sai Ram Reddy ◽  
Madhusudhan Bolla ◽  
M. Longshithung Patton ◽  
Dibyendu Adak
Keyword(s):  
Comparative Study ◽  
Steel Tube ◽  
Cement Concrete ◽  
Structural Behaviour ◽  
Concrete Filled Steel Tube ◽  
Reinforced Cement ◽  
Stub Column

Temperature Field Analysis of Circular Concrete Filled Steel Tube Reinforced Concrete Column under Fire

2014 ◽  
Vol 1015 ◽  
pp. 219-222 ◽  
Author(s):  
Jian Sheng Dong ◽  
Qing Xin Ren ◽  
Lian Guang Jia
Keyword(s):  
Reinforced Concrete ◽  
Three Dimensional ◽  
Steel Tube ◽  
Field Analysis ◽  
Concrete Column ◽  
Analysis Model ◽  
Structural Behaviour ◽  
Reinforced Concrete Column ◽  
Element Analysis ◽  
Concrete Filled Steel Tube

A three-dimensional finite element analysis model was developed using ABAQUS to simulate the temperature distributions of circular concrete filled steel tube reinforced concrete column in this paper. The influence of main parameters on the temperature distribution, such as heating time, section diameter, and steel tube diameter, was analyzed. This provides valuable information about structural fire resistance and structural behaviour of concrete filled steel tube reinforced concrete column structure under fire.

scholarly journals Comparative Study of Pure Mg and AZ91D as Sacrificial Anodes for Reinforced Cement Concrete Structures in Chloride Atmosphere

2018 ◽  
Vol 4 (8) ◽  
pp. 1750
Author(s):  
Yogesh Iyer Murthy ◽  
Sumit Gandhi ◽  
Abhishek Kumar
Keyword(s):  
Comparative Study ◽  
Potential Drop ◽  
Ultimate Tensile Stress ◽  
Cement Concrete ◽  
Percentage Elongation ◽  
Half Cell ◽  
Cell Potential ◽  
Reinforced Cement ◽  
Bare Steel ◽  
High Chloride

Comparative study of the corrosion behavior of pure Magnesium and AZ91D anodes in reinforced cement concrete was undertaken in the present work. The steel reinforcements were kept in contact with these anodes electrochemically in chloride atmosphere and the half-cell potential drop was observed. Bare steel reinforcements were tied to the anodes and were also kept in high chloride atmosphere to test the mechanical properties. The yield stress and ultimate tensile stress were found to decrease by approximately 50MPa while the reduction in percentage elongation is approximately 25% for reinforcements tied to AZ91D and pure Mg at the end of 80 days compared to fresh steel reinforcement. The rate of corrosion of pure Mg was reportedly slightly higher compared to AZ91D due to the presence of inter-metallics as inferred through micro-graphs.

REVIEW ON COLUMN FIRE RESISTANCE DESIGN FOR CONCRETE FILLED STEEL TUBE

2018 ◽  
Vol 80 (6) ◽  
Author(s):  
Bishir Kado ◽  
Shahrin Mohammad ◽  
Yeong Huei Lee ◽  
Poi Ngian Shek ◽  
Mariyana Aida Ab. Kadir ◽  
...  
Keyword(s):  
Fire Resistance ◽  
Elevated Temperatures ◽  
Steel Tube ◽  
Tube Steel ◽  
Outer Diameter ◽  
Structural Behaviour ◽  
Concrete Filled Steel Tube ◽  
Standard Fire ◽  
Foamed Concrete ◽  
Cfst Columns

The use of concrete filled steel tube (CFST) columns offers an alternative for providing the required fire resistance and load bearing capacity, making its use in medium and high rise structures are highly popular. This paper aims to review the previous studies on CFST column under fire. The standards or codes of practice used in fire resistance designs have been highlighted. The design of the CFST column is summarised with previous investigations on experiments and numerical modelling at ambient temperature and elevated temperature. Different conclusions were drawn depending on the material’s properties, considered parameters and the method used for the investigations. Outer diameter or width of the steel tube, steel tube thickness, concrete grade, column length, and eccentricity of loadings are among the parameters that affects the structural behaviour of CFST columns under fire. Several numerical analyses software were adequately used for simulating the behaviour of CFST columns at elevated temperatures, and validated using experimental results. Furthermore, the advantages of using the fire resistance design approaches on CFST columns filled with lightweight foamed concrete is highlighted. In conclusion, there is the need for more studies on standard fire tests of CFST column filled with light weight foamed concrete which is not covered in the current design guide.

scholarly journals Structural Behaviour of Reinforced Concrete Corroded Column

2021 ◽  
Vol 2070 (1) ◽  
pp. 012175
Author(s):  
M Usha Rani
Keyword(s):  
Axial Strain ◽  
Aggressive Medium ◽  
Steel Corrosion ◽  
Absorption Capacity ◽  
Chloride Ions ◽  
Load Test ◽  
Cement Concrete ◽  
Structural Behaviour ◽  
Premature Failure ◽  
Reinforced Cement

Abstract Worldwide in the construction industry uses reinforced cement concrete. The different types of structures which were built using reinforced cement concrete served for long period. But due to faulty design, improper quality control and corrosion of reinforcement there are notable premature failure and subsequently sudden collapse of the structure occurs. The presence of aggressive medium such as moisture and chloride ions are the main factors which are induces the steel corrosion. The cost involves for repairing the corroded structure escalate very rapidly which leads property loss to the people, if the problem is not corrected. Columns are the main structural members of R.C bridges when exposed to de-icing salt they are more vulnerable to steel reinforcement corrosion. The thorough knowledge about the corrosion can get only by proper investigation. This experimental work mainly focuses on structural behaviour R.C columns subjected to steel corrosion. Columns with two different size were cast and accelerated corrosion was induced. Structural behaviour of the columns were studied with axial load test and compared with conventional specimen. The ultimate load carrying capacity, axial strain, energy absorption capacity were reduced in all the corroded columns

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