Finite Element Modeling of Fibre Reinforced CFT Columns

摘要

To improve the ductility and energy absorption capacity of CFT columns, they are filled with steelfibre reinforced concrete (SFRC), called SFRCFT columns. In the present study, the behaviour ofSFRCFT columns has been investigated by carrying out nonlinear analysis using finite elementmethod. A three-dimensional nonlinear finite element analysis was conducted using ANSYS 10.The concrete is modeled using ‘SOLID65'eight-node brick element, which is capable of simulatingthe cracking and crushing behaviour of brittle materials. The fibres have been modeled discretelyusing ‘LINK8' 3D spar element. The slip between fibres and the concrete has been modeled using‘COMBIN7' element, which connects the nodes of the ‘LINK8' element representing the fibres andthe ‘SOLID65' elements representing the concrete. The accuracy and validity of the finite elementmodeling has been verified by comparison with the experimental results. From this comparison, ithas been found that the behaviour predicted by nonlinear finite element analysis using ANSYSfollowed closely the experimental behaviour. The obtained results show that the use of SFRC inCFT columns has considerable improvement in the structural behaviour of SFRCFT columns suchas strength, ductility and energy absorption capacity of columns.