In order to study the seismic performance of preloaded prefabricated joints under different pre-stress,this paper makes an experimental study on three preloaded prefabricated joints,and obtains the hysteretic performance,bearing capacity,energy dissipation capacity,ductility and self resetting perform-ance of the joints under different prestress.Then the finite element model of the joint is established and the expanded parameters of the joint are studied.The results show that the preloaded fabricated joint proposed in this paper has better self resetting capacity and energy dissipation performance.In a certain range,with the increase of initial prestress,the stronger the self resetting capacity of the joint is,and the increase of initial effective prestress can improve the bearing capacity of the joint to a certain extent.However,the greater the initial prestress is,the better.The increase of the initial prestress will lead to the decrease of the energy dissipation capacity of the joint.
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