不同埋深的钢管混凝土柱脚-基础锚固试验研究
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摘要
大连国际会议中心结构的竖向承载和水平抗侧力体系主要由数个钢管混凝土叠合柱边框组合核心筒构成,保障核心筒钢管混凝土边框柱与混凝土基础的可靠锚固性能是其抗震设计的关键技术之一。以该工程核心筒边框柱-混凝土基础为原型,设计了2个不同柱脚埋深的1/5缩尺的钢管混凝土柱脚-钢筋混凝土基础组合试件,并对其进行了锚固工作性能试验。试验采用单向重复荷载,重点研究了柱脚埋深对组合试件的锚固承载力和延性性能的影响。试验结果表明:增大柱脚埋深能有效提高其锚固承载力和延性性能;2个试件原型的构造做法均可满足设计要求,其锚固是可靠的。
The structure of Dalian Conference Center is composed of some composite core walls with concrete filled steel tube(CFT)column borders.So one of the key technologies is ensuring the anchorage reliability between the CFT column and the concrete foundation.In this paper,two 1/5 scale specimens of CFT column base embedded in concrete reinforced foundation were made based on engineering structures and tested under uniaxial repeated loading.Through the experiments,the effect of embedded depth on bearing capacity and ductility is studied.Tested results show that increasing embedded depth may effectively improve the anchorage performance of the CFT column base.The construction methods in engineering can meet design requirements,and the anchorage performance is reliable.
The structure of Dalian Conference Center is composed of some composite core walls with concrete filled steel tube(CFT)column borders.So one of the key technologies is ensuring the anchorage reliability between the CFT column and the concrete foundation.In this paper,two 1/5 scale specimens of CFT column base embedded in concrete reinforced foundation were made based on engineering structures and tested under uniaxial repeated loading.Through the experiments,the effect of embedded depth on bearing capacity and ductility is studied.Tested results show that increasing embedded depth may effectively improve the anchorage performance of the CFT column base.The construction methods in engineering can meet design requirements,and the anchorage performance is reliable.
引文
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[8]GB50010-2002,混凝土结构设计规范[S].GB50010-2002,Code for design of concrete structures[S].
[2]张晓新,曹万林,薛素铎.抗拔钢筋对提高混凝土承台-钢柱脚锚固承载力的研究[J].世界地震工程,2006,22(03):131-135.Zhang Xiaoxin,Cao Wanlin,Xue Suduo.Study on ultimate up-lift bearing capacity of steel column base embedded in concrete pile cap with anti-punching shear bar[J].World Earthquake Engineering,2006,22(03);131-135.
[3]曹万林,薛素铎,张毅刚,等.国家体育场桁架柱柱脚锚固性能试验研究[J].建筑结构学报,2007,28(2):126-133.Cao Wanlin,Xue Suduo,Zhang Yigang,et al.Experimental study on anchorage performance of steel column base of the national stadium[J].Journal of Building Structures,2007,28(2):126-133.
[4]张晓新.钢筋混凝土承台-钢柱脚组合部件工作性能试验及分析[D].北京:北京工业大学,硕士学位论文,2006.Zhang Xiaoxin.The experiments and analyses of the performance of Rc pile caps-steel column base combinational part[D].Masters’thesis,Bei-jing University of Technology,2006.
[5]梁书亭,蒋永生,李传殿.型钢混凝土桩基承台抗冲切性能的试验研究[J].建筑结构学报,1998,19(06):59-64.Liang Shuting,Jiang Yongsheng,Li Chuandian.Experimental research on punching shear behavior of steel reinforced concrete pile cap[J].Jour-nal of Building Structures,1998,19(6):59-64.
[6]蔡益燕.高层钢结构柱脚的抗震设计[J].建筑结构,1997,14(6):3-8.Cai Yiyan,Aseismic design of embedded and encased column base in high-rise building steel structures[J].Building Structure,1997,14(6):3-8.
[7]李继祥,许成祥,彭少民.钢纤维混凝土三桩厚承台传力机理与配筋计算[J].江汉石油学院学报,1995,17(3):114-118.Li Jixiang,Xu Chengxiang,Peng Shaomin.Load transfer mechanism of SFRC thick pile cap with three piles and calculation of the tension and quantity of steel[J].Journal of Jianghan Petroleum Institute,1995,17(3):114-118.
[8]GB50010-2002,混凝土结构设计规范[S].GB50010-2002,Code for design of concrete structures[S].
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