Experimental Study On Influence Of Axial Compression Ratio On Shear Static Performance Of CFRP-tube

Domestic and foreign scholars’ research on the various mechanical properties of CFRP-steel-concrete concrete members is limited to simple forms,such as CFRP-tube concrete members in pure bending,axial compression and pure shear,etc.-There are few studies on the influence of shear strength of concrete-filled steel tube,and there are not many references for reference.This topic is to explore it through experimental research.From the perspective of engineering practice and current status quo,the content of this research is of great significance,which not only supplements the research content of this structural system,but also studies the hysteretic behavior of CFRP-tube-reinforced concrete shear members and the future scholars.Classes of components lay the foundation for the study of other complex forms of force.In this paper,the experimental research method is mainly used.After the test,the finite element model of the component is established by using ABAQUS software,and the load-displacement curve of the simulation and experiment is compared and further explored.The main contents of this thesis are:a comprehensive overview of CFRP-steel-concrete composite members,including the composition and characteristics of the components,the application in engineering practice and the research status of this topic at home and abroad;24 CFRP-tube concrete The test of the loading failure of the test piece,the system analysis of the test results after the test,mainly considering the number of circumferential CFRP layers(0 layers,1 layer,2 layers,respectively)and the axial compression ratio(0,0.25,0.5,respectively).0.75)Two variation parameters,the V-Δ curve,the τ-γcurve and the V-ε curve are drawn by the collected vertical load,displacement and strain value data,and the shape and trend of the above curve are carefully analyzed;The finite element model of CFRP-steel-concrete composite members under compression-shear combination is established by using ABAQUS software.The comparison between the simulation curve and the test curve not only validates the validity of the model,but also provides theoretical support for the test conclusion.