The Research On Seismic Behavior Of Reinforced Concrete Columns Strengthened With Basalt Fiber Sheets

In recent years,in the basalt fiber reinforced concrete column seismic performance research,both domestic and abroad have made a lot of academic research value and promote the use of value of the results,but the existing research results can not meet the needs of engineering applications.In this paper,the seismic performance of reinforced concrete columns strengthened with basalt fiber cloth is mainly studied.(1)Based on the seismic performance test of [23],the finite element analysis of seismic behavior of reinforced concrete columns strengthened with basalt fiber reinforced concrete was carried out by using ABAQUS large general calculation software,and the accuracy of finite element model was verified.(2)Two sets of reinforced concrete columns with slenderness ratios of3,5,7,9,11 were established,one of which was not reinforced and the other group was covered with basalt fiber cloth.Based on this,the effects of basalt fiber reinforcement and slenderness ratio on the hysteretic behavior,ductility,strength,stiffness and energy consumption of reinforced concrete columns were analyzed.(3)In order to improve the bearing capacity of the most economical package number limit of reinforced concrete columns are strengthened with basalt fiber sheets,on the basis of the original model,the other 5 groups of models have been established,respectively using basalt fiber cloth wrapped 1 layer and 3~6 layer,influence of wrap layers and the slenderness ratio of the reinforced concrete column ultimate bearing capacity.The results show that the model can simulate the seismic performance of reinforced concrete columns strengthened with basalt fiber cloth,which is in goodagreement with the experimental results.At the same time,the use of basalt fiber reinforcement can improve the ultimate bearing capacity and ductility of reinforced concrete columns and delay the stiffness and strength degradation.The hysteretic behavior,ultimate bearing capacity and ductility of reinforced concrete columns before and after reinforcement And stiffness degradation have a certain impact.