Green High-Performance Fiber-Reinforced Cementitious Composites（GHPFRCC）is a material of Engineered Cementitious Composite（ECC）

where cement is substituted by a large amount of fly ash

with excellent ductility and energy dissipation capacity.In order to increase the seismic performance of RC columns after fire

a reinforcement method was proposed by using GHPFRCC materials.Pseudo static tests of RC columns reinforced by GHPFRCC materials was carried out

and numerical simulation was performed by using OpenSees.The reliability of the finite element analysis was verified by comparing the simulation results with the test results.Based on the test results and finite element analysis

it was proved that the hysteresis loop and the skeleton curve obtained from the tests were in good agreement with those from the simulation

and the deviation of the ultimate bearing capacity was not large.Compared with unreinforced RC columns

the deformation capacity of RC columns increased obviously.Specifically

the ultimate bearing capacity and the limit displacement increased respectively by 26.63%and 12.5%after reinforcement.Meanwhile

the degradation rate of post horizontal load decreased

the hysteresis loop became fuller

and the seismic performance was better.Furthermore

aparametric analysis was carried out using OpenSees.The analysis showed that the axial compression ratio must be well controlled in order to ensure the ductility and bearing capacity of RC columns;it is suggested that the replacement height of GHPFRCC materials is greater than one third of the column height.