Experimental study on axial compressive performance of RC full-size columns reinforced with reactive powder concrete and steel mesh under load
In order to improve the axial compressive performance of reinforced concrete(RC)columns under load,reactive powder concrete and steel mesh(RPCSM)was used to strengthen RC full-size columns under load.Seven RC square columns were designed and fabricated,including one unreinforced comparison column,one reinforced column with end stirrups,two reinforced columns with RPCSM,three reinforced columns with end stirrups and RPCSM.Considering the effects of reinforcement layer thickness,reinforcement ratio and end stirrup densification on the performance of axially compressed RC columns,experimental studies were carried out,and the failure mode,load deformation relationship and strain variation law of each specimen were analyzed.The test results show that the bearing capacity of strengthened columns was increased by 2.81～3.82 times.The interface between the original concrete column and RPCSM reinforcement layer was bonded reliably and works well together.With the increase of reinforcement mesh reinforcement ratio and thickness of RPCSM layer,the improvement of integrity after densification of end stirrups,the bearing capacity and axial deformation capacity are improved,but the ductility is reduced.Combined with the code and failure mechanism,the calculation formula of bearing capacity was given to promote the popularization of this reinforcement technology.
reinforcement under loadreactive powder concretereinforced concrete full-size columnaxial compression performancesteel meshreinforcement ratio
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