Research on the Seismic Behavior of Strut-waling-diaphragm Wall Joint
Research purposes:Prefabricated construction technology has advantages such as low material consumption and high production efficiency.In China,prefabricated construction technology has gradually been applied to the construction of metro stations.To adapt to the common internal support and protection system in Guangzhou,Guangzhou Metro has proposed a new form of prefabricated metro station.The temporary support structure of this metro station will serve as a permanent structure of the station,adopting a"two-in-one wall"design.Therefore,this project places high demands on the connection accuracy and mechanical performance of the strut-waling-diaphragm joint.Based on this project,low-cycle loading tests were conducted on the full-scale joints to explore the applicability and safety of two connection schemes:steel plate and mechanical coupler connection used in this project.The seismic performance differences between the two full-scale joints were also compared.Research conclusions:(1)The test results showed that both types of connection methods can meet the seismic performance requirements for the design of prefabricated metro station structures.(2)The failure locations of both joints were at the interface between the waling beam and the strut.During the design phase,the connection strength at this location should be reinforced.(3)Compared to the coupler-connected joint,the steel plate-connected joint behaved with less strength degradation,higher stiffness,better ductility,and superior seismic performance.Therefore,steel plate connection joints should be prioritized as the preferred connection method for this type of prefabricated metro station.(4)The research results can provide reference for seismic design of prefabricated metro station nodes.
metro stationsprefabricated structurefull-scale testlow-cycle loading
万方数据
维普
