Seismic performance study of replaceable energy-dissipating components in prefabricated concrete column base joints
This study focuses on the innovative design of column base joints in prefabricated concrete struc-tures,particularly the application of replaceable energy-dissipating components(REDCs).The column base joints are composed of prefabricated columns,a concrete foundation,and REDCs,with designated spaces on each side for the installation of REDCs.The design includes lateral extensions of square steel tube top plates and elevated steel stoppers welded to embedded steel plates,ensuring stability under horizontal shear forces and energy dissipation capacity during seismic events.Detailed modeling of the column base joints in this paper reveals independent transmission paths for axial forces,shear forces,and moments.The REDCs are designed to yield and dissipate energy during significant seismic activity,thus protecting the main struc-ture from damage.The modeling process accounts for the maximum axial compressive force and maximum yielding moment,making this column base joint particularly suitable for prefabricated columns subject to composite loads,such as in frame and cantilever column systems,which indicate that this column base joint design not only improves the seismic performance of the structure but also enhances the reparability and durability through the replaceability of REDCs,offering a new seismic solution for prefabricated concrete structures.
Precast concrete structureReplaceable energy dissipating connectorsSeismic performanceNumerical simulation
万方数据
维普
