(长江大学城市建设学院,荆州 434023)
［摘要］以十字形截面钢管混凝土异形柱-钢梁框架中柱节点为研究对象，按1∶2比例设计了4个弱节点和强节点模型，通过施加恒定轴压比的竖向荷载和低周反复水平荷载，对节点模型进行了加载破坏试验。试验结果表明：弱节点试件破坏形态为节点核心区剪切破坏，随轴压比增大，试件受剪承载力提高，但其延性性能降低；强节点试件破坏形态为梁端受弯破坏，破坏前经历了较大的塑性变形，延性系数达到了5.65。由此可见，合理地设计钢管混凝土异形柱-钢梁框架中节点，可保证其延性破坏，实现“强柱弱梁，节点更强”的设计原则，满足抗震性能要求。
［关键词］异形截面柱；钢管混凝土；框架节点；抗震性能
中图分类号：TU398-7文献标识码：A文章编号：1002-848X(2012)03-0080-04
Experimental research on seismic behavior of interior joints in the composite frame consisting of CFST crisscross section columns and steel beams
Xu Chengxiang, Wan Bo, Zhang Jicheng, Ma Jinjun(School of Urban Construction, Yangtze University, Jingzhou 434023, China)
Abstract:By taking interior joints in the composite frame consisting of concrete-filled steel tubular(CFST) crisscross section columns and steel beams as the research objects, 4 one half scaled models of the weak joints and the strong joints were designed and manufactured, and the destruction test on the models was carried out under vertical stable loads and lateral cyclic loads. The test results show that the failure mode of the weak joints is the shear failure in the panel zone, and that of the strong joints is the bending failure at the beam end. With the increasing of the axial compression ratio, the shear bearing capacity of the weak joints increases, however, the deformation capacity and ductility decrease. The strong joint undergoes a large plastic deformation before the damage, and the effective ductility factor of the model reaches 5.51. The interior joint in the composite frame consisting of CFST crisscross section columns and steel beams has the ductile damage by the rational design, and meets the demands of seismic design, that is strong column, weak beam, stronger joint.
Keywords:special-shaped section column; concrete-filled steel tubular (CFST); frame joint; seismic behavior
* 国家自然科学基金项目（50978033）。
作者简介：许成祥，博士，教授，博士生导师，Email:cx_xu@sina.com。
参考文献
［1］王依群-混凝土异形柱结构理论及应用［M］.北京:知识产权出版社，2006.
［2］许成祥-异形截面钢管混凝土结构研究现状与分析［J］.长江大学学报：自然科学版，2010,7(3):126-130.
［3］徐礼华,杜国锋,温芳，等-组合T形截面钢管混凝土柱正截面受压承载力试验研究［J］.土木工程学报，2009,42(6):14-21.
［4］卢海林,吴军民,许成祥-钢管混凝土框架节点选型与设计［J］.武汉理工大学学报，2004,26（2）:44-49.
［5］JGJ 101—96建筑抗震试验方法规程［S］.北京:中国建筑工业出版社,1997.
［6］张继承，沈祖炎 L形钢管混凝土框架结构抗震性能试验研究［J］.建筑结构学报，2010,31(8):1-7.
［7］周起敬,姜维山,潘泰华 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.
［8］周天华 方钢管混凝土柱-钢梁框架节点抗震性能及承载力研究［D］.西安：西安建筑科技大学,2004.