Study On Bending Shear Behavior Of Square Concrete Filled CFRP-Steel Tube(S-CF-CFRP-ST)

CFRP-concrete-filled steel tubular members are developed on the basis of concrete filled steel tubes.The same is a kind of member formed by pouring a certain strength of concrete inside a steel pipe and tamping it.Then,At present,long-time research on CFRP-CFST structures has found that all three kinds of materials that form this kind of structures can be well bonded and integrated,and can work together and work together.At this stage,scholars who study this kind of components in depth study not only the mechanical properties of many components under simple force(such as axial compression,axial compression,torsion,biasing,Bending and bending),but also in complex forms such as axial compression-torsional composite,axial compression-shear composite,axial compression-bending-torsional composite,axial compression-bending-shear composite Some research.However,the researches on the pure shear and bending shear are still not perfect at present.The research results on the shear properties of concrete filled CFRP-CFST can also lay the theoretical foundation for the future research on bending shear in hysteresis.The general research project mainly investigates the law,the observation law,the literature law and the test law as well as the theoretical analysis method as the basic method of study.However,this subject mainly uses the experimental research method and the theoretical analysis method as the main research methods.A total of 15 CFRP-CFST specimens were designed in this experiment.Based on the experimental study;the ABAQUS model was established for theoretical research.The main objective of the experimental study is to investigate the failure of CFRP-CFST under single bending and shear loading,and then through the integrated analysis of the experimental phenomena and the collected data(including load control,displacement measurement and strain measurement Square surface content)to in-depth study of its mechanical properties under bending shear effect.The theoretical study is to use ABAQUS simulation software to establish and test the corresponding experimental finite element model,including the size of the specimen and the corresponding boundary conditions.Then the simulation results,including V-?,?-?and V-? curves,and the failure modes of the components are compared with the experimental results to verify the validity of the model.And finally concluded a certain law,reach a conclusion that the failure mode of the shear span ratio of square CFRP-concrete-filled steel tube under different ranges is obtained.laying a theoretical foundation for future research on bending and shearing.