（1 内蒙古科技大学建筑与土木工程学院，包头  014010； 2 陕西省现代建筑设计研究院，西安  710048）
［摘要］完成了四个矩形钢管混凝土框架节点（外加强环）模型的拟静力试验。研究表明：矩形钢管混凝土框架节点滞回曲线饱满，耗能能力强；达到极限荷载后具有良好的延性和稳定的后期承载能力，位移延性系数在3.5～4.76之间，满足延性节点的要求，具有较好的受力性能和抗震能力。梁柱线刚度比较大的试件具有较高的承载力和弹性阶段刚度，增大轴压比对试件的弹性刚度影响不大，但随着轴压比的增加，试件的后期变形能力有减小的趋势。
［关键词］矩形钢管混凝土；框架节点；拟静力试验；滞回性能；延性；耗能
Quasi-static experimental research for concrete-filled rectangular steel tubular frame joints
Li Bin1, Gao Chunyan1, Shi Xiaoyan2(1  School of Architecture and Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China；2  Institute of Modern Architecture Design in Shannxi, Xi′an 710055, China)
Abstract:The quasi-static test of four concrete-filled rectangular steel tubular（CFRST）frame joint(exterior stiffened ring) models were finished. The results indicate that the CFRST frame joints have plump hysteretic loops, stronger energy dissipation capacity, better ductility and steady late load-carry capacity after the joints reach ultimate loads, the ductility coefficient is between 3.5 and 4.48, the joints can meet the requirement of ductile joint, and have superior mechanical behavior and seismic capacity. The specimen whose beam-column linear stiffness level is higher has higher load-carrying capacity and elastic stiffness, the increase of axial load level has little effect on the elastic stiffness, but with the augment of the axial load level, the late deformation ability will minish.
Keywords:concrete filled rectangular steel tube; frame joint; quasi-static test; hysteretic behavior; ductility; energy dissipation
内蒙古自然科学基金项目（200711020701），包头市科技攻关项目（2006z1004），内蒙古教育厅资助项目（NJ06141）。
作者简介：李斌，博士，教授， Email:btlibin@189.cn。
参考文献
［1］CECS159:2004矩形钢管混凝土结构技术规程［S］.北京:中国计划出版社,2004.
［2］ZHANG YAOCHUN, XU CHAO, LU XIAOZHE. Experiment study of hysteretic behavior for concrete-filled square thin-walled steel tubular columns［J］.Journal of Constructional Steel Research,2006(4):1-9.
［3］WU LAIYUN, CHUNG LAPLOI, TSAI SHENGFU, et al. Seismic behavior of bolted beam-to-column connection for concrete filled steel tube［J］. Journal of Constructional Steel Research,2005(3).
［4］JGJ101—96建筑抗震试验方法规程［S］.北京:中国建筑工业出版社,1997.
［5］唐九如.钢筋混凝土框架节点抗震［M］.南京：东南大学出版社,1989.
［6］高春彦.矩形钢管混凝土框架节点抗震性能试验研究［D］.包头:内蒙古科技大学,2007.
［7］周起敬.钢与混凝土组合结构设计施工手册［M］. 北京:中国建筑工业出版社,1991.