高强混凝土框架节点抗震性能研究

A study of earthquake-resistant behavior of high strength reinforced ceoncrete frame joints

通过对四榀高强混凝土框架节点缩尺模型的抗震性能研究 ,发现用高强混凝土做框架节点 ,其破坏形式同普通混凝土一样 ,也是经历了初裂、通裂直至破坏 .通过核心区配箍量的变化 ,从梁端位移延性和节点的抗裂强度可以得出 :用高强混凝土做框架节点能保证抗震工程实践要求 .

Through experimental research of the scale down models of four high strength reinforced concrcte frame joints under low cyclic loads, it is found that the destruction patterns of the joints are the saame as with common concrete, i.e. the cracking originates first, then the fracture goes down to the end, and fimlly the destruction tkes place. With the change of stirrup rtio in the nuclear area of the joint, displacement ductility of beam ends and cracking strength of joints are investigated so that high strength reinforced concrete frame joints can be obtined and stey can meet the requirement of engineering practiee for earthquake resistance.