Study on axial compression performance of predamaged columns reinforced with steel casing and steel fiber mortar
In order to improve the mechanical properties of steel casing reinforcement method,a new type of reinforced material steel fiber cement mortar is introduced,and a new type of composite structure of steel casing reinforced with steel fiber cement mortar(SFRC)is proposed.Based on the experimental research,the corresponding calculation model of the reinforced column was established by using ABAQUS and its rationality was verified,and the nonlinear parameter analysis of the key factors affecting the axial pressure performance of such reinforced column was carried out.The results show that the ultimate bearing capacity of reinforced columns increases with the increase of steel casing thickness,steel strength and steel fiber ce-ment mortar strength,and the change of steel casing thickness has a greater impact on the ductility of rein-forced columns,while the increase of steel fiber cement mortar strength has a negative impact on the duc-tility.The hooper loading method can obtain higher lifting effect of bearing capacity and deformation per-formance.With the same damage degree,the concrete strength of the inner column has little influence on the performance of the reinforced column.Based on the superposition principle,the calculation formula of axial bearing capacity of this kind of reinforced column is derived,and the calculation results are in good agreement with the finite element simulation results.
万方数据
维普
