Analysis of Combined Effect of High Strength Circular Steel Tube and High Strength Concrete Short Columns under Axial Compression with I-Shaped CFRP Profiles
In order to research the combined effect of three materials on the high-strength concrete filled high-strength circular steel tube short columns with I-shaped CFRP profiles under axial compression.The finite element analysis software ABAQUS is used to conduct numerical simulation,verify the accuracy of the model through relevant tests,and analyze the failure form and stress curve of typical components,reveal the interaction and working mechanism between components of the component,and evaluate the effect of CFRP configuration ratio,steel yield strength,concrete compressive strength,and confinement effect coefficient on combined effect.The CFRP profiles embedded in the high-strength circular steel tube and high-strength concrete column can significantly improve the ductility and safety margin of the members,improve the confinement of the steel tube to the concrete,and improve the combined effect of the members.If the CFRP configuration ratio is controlled at 5.9％～8.4％,the confinement effect coefficient is between 1.2～1.4,and the steel yield strength is not greater than 770 MPa,then the combined effect of the three materials is the best.
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