高强钢筋钢纤维混凝土框架中节点抗震性能试验研究

Subjects: Mechanics >> Applied Mechanics submitted time 2023-03-20 Cooperative journals: 《应用力学学报》

张健新 赵茜娅 丁传林 李润斌 张标

Abstract： This paper designs frame interior joints with overal or local steel fiber concrete to study th seis-mic performance of beam-column joints with high strength reinforcing bars and improve the large measuredslip due to the usage of high strength reinforcing bars.'Two normal concrete joins with HRB600/HRB400reinforcing bars and two steel fiber concrete joins with HRB600 reinforcing bars were tested under reversed cyclic loading.The failure characteristic, hysteretic curves of specimens were obtained.The energy dissipa-tion , cumulative damage , displacement ductility ,and slip of beam reinforcement were analyzed.'The resultsshowed that shear failure of the connection core occurred in all joint specimens. The bearing capacity andenergy dissipation capacity were improved by enhancing the reinforcement bar grade , whereas the meas-ured slip of beam reinforcement increased.'The crack width and slip of beam reinforcement in specimenswith overall or local steel fiber concrete were effectively reduce.'The failure mode , hysteretic behavior, en-ergy dissipation capacity and ductility were improved and the cumulative damage and stiffness degradationwere alleviated.

YES

 Hits 338  Downloads 135  Comment