钢筋混凝土框架结构轻钢加层中柱连接节点试验研究
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(合肥工业大学土木与水利工程学院， 合肥 230009)［摘要］ 在轻钢加层中，新钢柱与原混凝土柱之间的连接能否满足设计要求是其成功的关键。以实际工程为例，结合外包柱脚的构造形式，提出了先在原柱顶面增加满足柱脚锚栓锚固高度的混凝土柱，再在其上固定钢柱并设置钢柱外包钢筋混凝土柱的方法。结合有限元软件及试验分析了该柱脚连接节点与钢柱直接加层柱脚连接节点在循环荷载下的失效模式及耗能特性。结果表明，所设计的柱脚具有良好的承载能力和耗能能力，该柱脚的试验值与理论分析基本一致，再次证明了该柱脚的可靠性。［关键词］轻钢加层; 连接节点; 有限元分析; 耗能能力; 滞回曲线中图分类号：TU317.1 文献标识码：A 文章编号：1002-848X(2014)23-0085-04Experimental study on middle-column connecting nodes of light-steel adding-story in reinforced concrete frame structureChen Daozheng, He Chihe, Xie Binghua（College of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China）Abstract: If the connection between new steel column and original concrete column could meet the design requirements or not is the key to success of light-steel adding-story project. Based on an actual project, combined with the form of encased column base, a method is proposed as adding a concrete column on original column top to meet the height requirement of column foot anchoring bolt and then fixing the steel column on new concrete column with set of encased reinforced concrete. Analyses of failure mode and energy dissipation capacity under cyclic loading were carried out on connecting node of proposed column base and connecting node of steel column directly set on the concrete column respectively by finite element program and experiment. The results show that proposed column base has well bearing capacity and energy dissipation capacity. The experiment results of proposed column base are basically consistent with theoretical analysis, which proves the reliability of the proposed column base again.Keywords: light-steel adding-story; connecting node; finite element analysis; energy dissipation capacity; hysteretic loop作者简介：陈道政，博士，教授，一级注册结构工程师，Email:cdztai@163.com。参考文献［1］陈道政, 李爱群. 楼顶钢结构塔楼的抗震分析及设计建议［J］. 建筑结构, 2004, 34(5): 33-35.［2］麻建锁,张涛.钢筋混凝土框架顶部钢结构加层的抗震性能分析［J］.地震工程与工程振动,2006,26(3):118-120.［3］骆甜.轻钢加层结构的地震反应分析及研究［D］.合肥:合肥工业大学,2007.［4］张涛,王元清,石永久.多层建筑顶部轻钢加层柱脚节点的设计与构造［J］.施工技术,2005,34 (10):36-38.［5］陈道政,高鹏,谢冰花.一种多层混凝土框架结构顶部的加层钢框架柱脚节点及其施工方法:中国, 201310753370［P］.2014-03-26.［6］JGJ 99—98高层民用建筑钢结构技术规程［S］.北京：中国建筑工业出版社，1998.［7］庄茁.ABAQUS非线性有限元分析与实例［M］.北京:科学出版社,2005.［8］杨刻亚,杨春梅,吴庆文.GFRP管混凝土圆形管柱抗震性能试验研究［J］.长春工程学院学报：自然科学版, 2008,9(2):18-20.［9］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.
