钢骨—T形钢管混凝土中长柱轴心受压试验分析
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摘要
为研究钢骨—T形钢管混凝土长柱轴心受压力学性能,对16根长细比为16<λ<43的钢骨—T形钢管混凝土柱进行轴心受压试验,研究试件破坏形态和工作机理,得到试件的荷载—纵向位移曲线、荷载—应变曲线以及荷载—挠度曲线。通过分析套箍指标、配骨指标和长细比等参数对试件轴心受压力学性能的影响,以及对比试件极限承载力的试验值和理论计算值,提出钢骨—T形钢管混凝土长柱轴心受压稳定系数计算方法,进而推出极限承载力计算公式。研究结果表明:内置工字型钢骨的T形截面钢管混凝土柱具有较好的延性;钢管、混凝土和钢骨三者能很好地协同工作,改善了核心混凝土的脆性破坏性质,使组合柱的承载力显著提高;所提出的试件极限承载力计算公式可供工程设计参考。
In order to study the mechanical properties of steel bone T-shaped concrete-filled steel tubular long columns under axial compression,an experimental analysis on 16 specimens with the slenderness ratio of 16<λ<43 under axial compression was carried out.The failure modes and work mechanism were studied,and curves of load-longitudinal displacement,load-strain and load-deflection of the specimen were obtained.By analyzing the effects of hoop index,bone index,slenderness ratio and other parameters on the mechanical property of the specimens under axial compression and comparing the experimental value of the specimen's ultimate bearing capacity with the theoretical value,the computational method of stability coefficient of the steel bone T-shaped concrete-filled steel tubular long columns under axial compression is proposed.The research results show that T-shaped concrete-filled steel tubular columns embedded with the "H" shaped steel bones have good ductility;steel tube,concrete and steel bone can work collaboratively,which improves the brittle failure properties of the core concrete and the bearing capacity of the composite column.The formula could be valuable for engineering design.
In order to study the mechanical properties of steel bone T-shaped concrete-filled steel tubular long columns under axial compression,an experimental analysis on 16 specimens with the slenderness ratio of 16<λ<43 under axial compression was carried out.The failure modes and work mechanism were studied,and curves of load-longitudinal displacement,load-strain and load-deflection of the specimen were obtained.By analyzing the effects of hoop index,bone index,slenderness ratio and other parameters on the mechanical property of the specimens under axial compression and comparing the experimental value of the specimen's ultimate bearing capacity with the theoretical value,the computational method of stability coefficient of the steel bone T-shaped concrete-filled steel tubular long columns under axial compression is proposed.The research results show that T-shaped concrete-filled steel tubular columns embedded with the "H" shaped steel bones have good ductility;steel tube,concrete and steel bone can work collaboratively,which improves the brittle failure properties of the core concrete and the bearing capacity of the composite column.The formula could be valuable for engineering design.
引文
[1]徐亚丰,向常艳,赫芳,轴心荷载下钢骨—钢管混凝土组合实验全过程分析[J].沈阳建筑大学学报,2005,21(6):640-643.
[2]赵大洲.钢骨—钢管高强混凝土组合柱力学性能的研究[D].大连:大连理工大学土木工程学院,2003.
[3]李王宁.高层钢一混凝土混合结构研究和设计的若干问题[D].南宁:广西大学土木建筑工程学院,2006.
[4]何保康,杨晓冰,周天华.矩形钢管混凝土轴压柱局部屈曲性能的解析分析[J].西安建筑科技大学学报:自然科学版,2002,20(3):36-39.
[5]黄宏.中空夹层钢管混凝土压弯构件的力学性能研究[D].福州:福州大学土木工程学院,2006.
[6]赵同峰,王连广.方钢管-钢骨高强混凝土压弯承载力计算[J].工程力学,2008,25(10):122-132.
[7]张国伟.钢管混凝土柱在地震作用下的累积损伤性能研究[D].长沙:湖南大学土木工程学院.2009.
[8]王頠,瞿伟廉.钢管混凝土弹塑性极限承载力研究现状[J].华中科技大学学报:城市科学版,2004,21(2):44-46.
[9]陈宝春,肖泽荣,韦建刚.钢管混凝土哑铃形偏压构件试验研究[J].工程力学,2005,22(2):89-95.
[10]王连广,赵同峰,安山河.方钢管-钢骨混凝土双向偏压试件试验研究与理论分析[J].建筑结构,2011.26(5):137-141.
[11]王玉银,刘昌永,皮永林,等.钢管混凝土圆弧拱平面内非线性稳定承载力[J].华中科技大学学报:自然科学版,2011,39(5):34-38.
[12]曲慧,王文达.钢管混凝土柱-梁连接节点弯矩-转角关系计算方法[J].工程力学,2010,27(5):106-114.
[13]陈宝春,高婧.波形钢腹板钢管混凝土梁受弯试验研究[J].建筑结构学报,2008,29(1):75-82.
[14]朱美春,王清湘,刘士润,等.钢骨-方钢管自密实高强混凝土轴压长柱试验研究[J].2006,46(6),875-879.
[15]何益斌,肖阿林,黄频.钢骨-钢管混凝土轴压中长柱极限承载力研究[J].建筑结构,2009,39(6),29-33.
[16]王宏伟,钟善桐,徐国林.空心钢管混凝土长柱轴压性能的试验研究[J].工业建筑,2006,36(12),69-72.
[17]蔡绍怀.现代钢管混凝土结构[M].北京:人民交通出版社,2003.
[18]王清湘,赵大洲,关萍.轴心受压钢骨钢管混凝土组合短柱力学性能研究[J].中国公路学报,2004,17(3):36-40.
[19]ACI 318-99 Building code requirements for structuralconcrete and commentary[S].Detroit:Amcrican Concrete Institute,1999.
[2]赵大洲.钢骨—钢管高强混凝土组合柱力学性能的研究[D].大连:大连理工大学土木工程学院,2003.
[3]李王宁.高层钢一混凝土混合结构研究和设计的若干问题[D].南宁:广西大学土木建筑工程学院,2006.
[4]何保康,杨晓冰,周天华.矩形钢管混凝土轴压柱局部屈曲性能的解析分析[J].西安建筑科技大学学报:自然科学版,2002,20(3):36-39.
[5]黄宏.中空夹层钢管混凝土压弯构件的力学性能研究[D].福州:福州大学土木工程学院,2006.
[6]赵同峰,王连广.方钢管-钢骨高强混凝土压弯承载力计算[J].工程力学,2008,25(10):122-132.
[7]张国伟.钢管混凝土柱在地震作用下的累积损伤性能研究[D].长沙:湖南大学土木工程学院.2009.
[8]王頠,瞿伟廉.钢管混凝土弹塑性极限承载力研究现状[J].华中科技大学学报:城市科学版,2004,21(2):44-46.
[9]陈宝春,肖泽荣,韦建刚.钢管混凝土哑铃形偏压构件试验研究[J].工程力学,2005,22(2):89-95.
[10]王连广,赵同峰,安山河.方钢管-钢骨混凝土双向偏压试件试验研究与理论分析[J].建筑结构,2011.26(5):137-141.
[11]王玉银,刘昌永,皮永林,等.钢管混凝土圆弧拱平面内非线性稳定承载力[J].华中科技大学学报:自然科学版,2011,39(5):34-38.
[12]曲慧,王文达.钢管混凝土柱-梁连接节点弯矩-转角关系计算方法[J].工程力学,2010,27(5):106-114.
[13]陈宝春,高婧.波形钢腹板钢管混凝土梁受弯试验研究[J].建筑结构学报,2008,29(1):75-82.
[14]朱美春,王清湘,刘士润,等.钢骨-方钢管自密实高强混凝土轴压长柱试验研究[J].2006,46(6),875-879.
[15]何益斌,肖阿林,黄频.钢骨-钢管混凝土轴压中长柱极限承载力研究[J].建筑结构,2009,39(6),29-33.
[16]王宏伟,钟善桐,徐国林.空心钢管混凝土长柱轴压性能的试验研究[J].工业建筑,2006,36(12),69-72.
[17]蔡绍怀.现代钢管混凝土结构[M].北京:人民交通出版社,2003.
[18]王清湘,赵大洲,关萍.轴心受压钢骨钢管混凝土组合短柱力学性能研究[J].中国公路学报,2004,17(3):36-40.
[19]ACI 318-99 Building code requirements for structuralconcrete and commentary[S].Detroit:Amcrican Concrete Institute,1999.
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