Dynamic responses of CFRP profile-concrete-filled square steel tube columns under lateral impact load
To investigate the lateral impact resistance of carbon fiber reinforced plastics-concrete-filled square steel tube(CFRP-CFST)columns under fixed-simply supports,the lateral impact tests of three CFRP-CFST columns were conducted using a horizontal impact test setup.According to the failure mode,local and global deformation,and the impact load of the column,the dynamic response of the column were analyzed.The in-fluence rules of the CFRP profile,boundary condition,impact energy,and impact impulse on the dynamic re-sponses were evaluated.The results show that the CFRP-CFST columns exhibit a bending failure mode and possess good impact resistance.The lateral impact resistance increases with the increase of the support restraint capacity.The increase of the unit impact impulse can reduce the peak displacement by 7％for cantilever speci-mens but only 1％for fixed specimens.The influence of the impact impulse on specimen deformation increa-ses with the decrease of the support restraint capacity.Encasing CFRP profiles into the fixed-simply CFST specimens can reduce the peak displacement at the impact position by 9％,and the reduction increases with the decrease of the support restraint capacity.
万方数据
维普
