Experimental Study On Reinforced Concrete Member With Hybrid Fiber Cloth

The use of HFRP to reinforce concrete structures is currently popular in the field of reinforcement.This method is to combine a variety of single FRP materials to reinforce the components;at the same time,the concrete is often subject to freeze-thaw cycles,alkali,acid,etc.,resulting in serious mechanical performance degradation.Therefore,it is of great significance to study the mechanical properties of hybrid fiber reinforced concrete members.In this paper,three fiber cloths,namely aramid fiber(AFRP),basalt fiber(BFRP),and glass fiber(GFRP),are selected as the main materials of constrained concrete members.The hybrid fiber reinforced concrete members are studied through experiments.The main research content as follows:A total of 12 different reinforcement methods,including single fiber and hybrid fiber,were used to reinforce concrete members with different layers of)And hybrid fibers(a layer of aramid fiber + a layer of glass fiber,a layer of basalt fiber + a layer of glass fiber,a layer of aramid fiber + a layer of basalt fiber),the durability test of the reinforcement members was carried out under the six reinforcement methods,And studied the mechanical properties of reinforcement members under different reinforcement methods under three corrosion conditions of freeze-thaw cycle,strong acid and strong alkali.The test results show that as the mechanical properties of the component increase with the number of reinforced fiber cloth layers,the improvement effect is better,but the number of reinforced fiber cloth layers and the lifting effect are not a simple multiple.Single fiber reinforcement has certain advantages in improving the strength of components.Compared with single fiber reinforcement,hybrid fiber reinforcement has a better effect on improving the ductility of components.Hybrid fiber reinforcement can comprehensively improve the mechanical properties of components and achieve the effect of complementary advantages.Under different reinforcement methods,reinforcement members can still exert their reinforcement effect after being weakened by freeze-thaw cycles,strong acid and strong alkali erosion.Under short-term freeze-thaw cycles,strong acid and strong alkali erosion,although the mechanical properties of each member will be weakened,Compared with unreinforced and uncorroded components,single fiber reinforcement has a better effect in improving the strength of components,and the conclusion that hybrid fiber reinforcement has more advantages in improving the ductility of components is still applicable.