Experimental Study And Numerical Simulation On Bearing Capacity Of Eccentrically Loaded H-shaped Steel Columns Strengthened With CFRP

Regarding the method of using CFRP for reinforcement,scholars at home and abroad have been more mature in the research of concrete structures,and they have been widely used in practical engineering.There are also more researches on flexural members in steel structures,but for CFRP reinforced steel structures.There are few studies on compression members,especially on H-section steel members,but H-section steel is widely used in practical engineering.In this paper,six H-shaped steel column compression-bending members are designed,and the CFRP adhesive layer number and eccentricity are used as parameters to carry out compression test research on the biased H-shaped steel column.Through experiments,the morphology of the member during failure was summarized,and the data was collated.Important conclusions such as the ultimate stable bearing capacity of the member,the relationship between the load and the change in displacement were obtained.Through data comparison and analysis,it is concluded that the effect of pasting CFRP with different number of layers on the ultimate stability of the member and the eccentricity on the reinforcement effect.Using the equal strength conversion section method,combined with the calculation formula of the bearing capacity of the bending and bending members in the "Steel Structure Design Standards" formulated by China,the calculation formula of the ultimate stable bearing capacity of the CFRP reinforced biased H-shaped steel column is obtained,and the theoretical calculation results are tested The comparison verifies the test accuracy.The finite element ABAQUS software was used to establish the model,and important data such as the ultimate bearing capacity,stress,strain,and displacement of the member were calculated,and the validity of the model was verified by comparing the test results.The test results and the simulation results are compared comprehensively.The influence of the number of CFRP pasting layers and eccentricity on the ultimate bearing capacity of the members is analyzed.To the data fitting,a correction factor is introduced to correct the calculation formula of the ultimate stable bearing capacity of CFRP reinforced and biased H-shaped steel columns.