摘要
预制预应力混凝土梁柱节点由预制梁、预制柱和预应力筋组成,通过张拉预应力筋使梁柱形成共同工作的整体。已有研究表明:装配式预应力混凝土框架节点在低周反复荷载作用下,裂缝主要出现在梁柱连接界面处,破坏形式为梁端受压区混凝土压碎,受拉区普通钢筋或预应力钢筋屈服,节点核心区及构件本身破坏轻微,普遍表现出变形能力强,位移延性好,耗能能力差,残余变形小,恢复性能好的特点。
Precast prestressed beam-column connections are consist of precast beam,precast column and bars, the synergistic effect is guaranteed by tensioning bars. Current research have demonstrated that under cyclic loading, crackings first occured around the interface of beam to column, concrete was crushed and reinforcement/bars yeled. Test re- sults indicate that inelastic deformation concentrates near the beam- column connections, while damage of the beam, column and joint is relative minor, and show less loop area and poor energy dissipation capability compared with the common concrete structure.
出处
《建筑技术开发》
2014年第1期67-72,共6页
Building Technology Development
基金
北京市科研成果在城市管理中的应用与转化课题"装配式大开间框架-剪力墙结构及关键技术开发"课题编号:Z121100007612008
北京市科研成果在城市管理中的应用与转化课题"新型高效大直径钢筋套筒灌浆连接节点产品开发及应用"课题编号:Z121100007612010
关键词
预制
预应力
框架节点
抗震性能
进展
precast
prestressed
beam-column connection
progress
