特殊配筋钢筋混凝土梁圆柱节点的试验（Ⅰ）

AN EXPERIMENTAL STUDY ON RC BEAM -CIRCULAR COLUMN JOINTS WITH SPECIAL REINFORCING DEVICES(Ⅰ)

高强度材料的应用、构件截面尺寸的小型化、大直径钢筋的使用等因素，梁柱节点设计成为钢筋混凝土结构抗震设计中需要特别注意的问题。本研究通过试验，探求节点内梁纵向受力钢筋采用不同锚固方法、节点核芯区配有特殊箍筋的钢筋混凝土梁圆柱节点在模拟地震荷载作用下的受力机理。本文介绍了试验的概要，并对试件的破坏特点、节点的抗剪承载力进行了讨论。

Because of use of high strength materials,small section of membersand large size of reinforcing bars, it is generally acknowledged that beam-columnjoints have become a critical zone of structural elements. Special attention to thedesign and detailing of beam-column joint in reinforced concrete structure,especially subjected to severe seismic loads, becomes much more important.The object of this study is to investigate the mechanical behavior of reinforcedconcrete beam-circular column joints with devices for development of beamreinforcing bars and with special spiral reinforcement inside the joint, which aresubjected to scores of alternating high intensity cyclic lateral load. In thispaper, the experimental work is described,and a part of experimental results arediscussed, which include the failure process and feature,the ultimate shear capacityof the joint.