Analysis of Stiffness and Ductility of Coral Concrete Columns Reinforced with BFRP Reinforcement Under Earthquake Action
The experiment was carried out to test how BFRP reinforcement(Basalt Fiber Reinforcement)reinforced coral concrete col-umns under seismic action.Six BFRP-reinforced full coral concrete columns were designed,and the breaking pattern,stiffness degra-dation and ductility of the specimens;three factors,namely,reinforcement rate,axial compression ratio and volumetric hoop ratio were analyzed to investigate the effects.Comparative tests were also conducted with ordinary steel reinforced coral concrete columns.The re-sults showed that the damage pattern of the specimens was dominated by bending damage under low circumferential repeated loads.In-creasing the reinforcement,hoop spacing and axial compression ratio can enhance the initial stiffness of BFRP-reinforced columns,but too large hoop spacing and axial compression ratio may adversely affect the stiffness degradation.There are some limitations in evalua-ting the seismic performance of BFRP bars using the traditional method of evaluating the ductility,and that the integrated indexes can more comprehensively reflect the load carrying capacity and deformation performance of BFRP bar columns.The stiffness and compre-hensive indexes of steel-reinforced columns are better than those of BFRP-reinforced columns.
万方数据
维普
