Numerical Study on Axial Behaviour of Concrete Filled Double Skin Steel Tubular (CFDST) Column with Cross Helical FRP Wrappings

International Conference on Recent Advancements and Effectual Researches in Engineering Science and Technology

Skaria, Anna^1 ; Kuriakose, Mariamol^1

Department of Civil Engineering, St. Joseph's College of Engineering and Technology, Palai, Kottayam, Kerala, India^1

关键词: Buckling of tubes;    CFDST;    Civil engineering structures;    Confinement effects;    Fibre reinforced polymers;    Permanent formwork;    Steel-concrete interface;    Strengthening technique;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/396/1/012008/pdf
DOI  :  10.1088/1757-899X/396/1/012008

来源: IOP

【 摘 要 】

Composite columns offers many structural benefits and widely used in civil engineering structures. CFDST consist of inner and outer steel tubes, and concrete sandwiched in between tubes. The steel tubes and concrete work together well and integrity of steel concrete interface is maintained. Steel tubes in inner and outer can acts as permanent formwork and primary reinforcement. Steel tubes provides a confinement effect to concrete and in turn concrete prevents the inward buckling of tubes. As there is deteriorations due to ageing and corrosion strengthening techniques are used. Strengthening can be done by using fibre reinforced polymer (FRP) as an external reinforcement. This paper aims to study about the load carrying capacity of fibre reinforced CFDST columns under axial load using ANSYS 16.2 (Workbench) software. The modeling of CFDST columns were studied with variation in angle (40°, 45°, 50°, 60°), material change and thickness change of FRP sheets.