Analysis on efficiency of slot-cutting around RC frame joint for 'strong column and weak beam' engineering design

摘要

A numerical model was established with Adina software for beam-column joint on a reinforced concrete frame. The results for the traditional joint and that for the joint with slot around were compared. It is shown that the stress in the reinforce bar for slab close to beam will increase significantly with the applied top drift in horizontal direction, and less for far from the beam. It is also shown that for the joint with slot around, the yielding time of column bar will shift to a later time, while number of cracks on column becomes less. The time interval between the occurrence of plastic pivot on beam and on column becomes longer. The occurrence of column plastic pivot on the first floor would be delayed, which exhibits a failure type closer to the ductile mode.