Shear and Seismic Performance Analysis of New Component Connection Schemes for Urban Rail Transit Prefabricated Underground Stations

Objective To further promote the application of underground prefabricated structures in urban rail transit projects, research on key technologies (especially new component connection schemes) is conducted for the entry/exit construction of open-excavation prefabricated urban rail transit stations. Method A prefabricated entry/exit structure for urban rail transit stations is designed, consisting of two same-sized unequal C-shaped standard components spliced together (with two transverse cracks). Based on this structure, a new type of component connection scheme is proposed. Through model experiments and numerical simulations, the shear and seismic performance of the new connection node is studied. Under different loading conditions, various performance indicators, such as load-displacement curve, shear behavior, seismic energy dissipation, and ductility are obtained to validate the reliability of the new connection node. Result & Conclusion The shear bearing capacity of the prefabricated component sections is