偏压作用下T形钢管混凝土芯柱的非线性分析
摘要
目的提出计算T形钢管混凝土芯柱的正截面承载力的有效方法,为钢管混凝土在工程中的设计和应用提供参考依据.方法基于平截面假定和材料模型,利用数值积分法编制了适用于计算T形钢管混凝土芯柱正截面承载力的非线性分析程序,得出极限承载力的电算结果以及不同钢管厚度和不同混凝土强度等级的N-M相关曲线.结果在偏压作用下,混凝土强度等级变化以及含钢率对T形钢管混凝土芯柱极限承载力影响明显.极限承载力随混凝土强度等级提高而提高,但是随着偏心距增大混凝土强度等级对极限承载力提高幅值越小;钢管壁越厚,含钢率大,提供核心混凝土的约束力越强,相同M值能承受的力越大,抗震性能与延性越好.结论实际工程应用时,通过试件的数值计算分析得出的M-N曲线可以快速计算出钢管厚度,为T形钢管混凝土芯柱的方案设计提供便利.
The purpose of the paper is to present effective way to figure out the bearing capacity of normal section of concrete-filled steel tube T shaped core columns,and provide a reference for the design and application of concrete filled steel tube in the project.Based on plane section assumption and material model,using numerical integration to compose nonlinear program that is suitable for calculating formal section bearing capacity of concrete-filled steel tube T-shaped core columns and obtain both computer calculated results of ultimate bearing capacity and N-M interrelated curves of different steel tube thickness and different concrete strength grade.Under unsymmetrical pressure,steel ratio and the change of concrete strength grade have a conspicuous influence on ultimate bearing capacity of concrete-filled steel tube T-shaped core columns.The ultimate bearing capacity with the concrete strength increased and improved,but as the amplitude of the smaller eccentricity increases the strength grade of concrete to improve the ultimate bearing capacity.The thicker the steel pipe wall,steel ratio,the stronger the binding core concrete,the greater the force the same value of M can withstand seismic performance and ductility,the better.M-N curve analysis obtained by the numerical calculation of the specimen can quickly calculate the thickness of steel tube in the actual project,to facilitate the design of the T-shaped steel concrete core columns.
The purpose of the paper is to present effective way to figure out the bearing capacity of normal section of concrete-filled steel tube T shaped core columns,and provide a reference for the design and application of concrete filled steel tube in the project.Based on plane section assumption and material model,using numerical integration to compose nonlinear program that is suitable for calculating formal section bearing capacity of concrete-filled steel tube T-shaped core columns and obtain both computer calculated results of ultimate bearing capacity and N-M interrelated curves of different steel tube thickness and different concrete strength grade.Under unsymmetrical pressure,steel ratio and the change of concrete strength grade have a conspicuous influence on ultimate bearing capacity of concrete-filled steel tube T-shaped core columns.The ultimate bearing capacity with the concrete strength increased and improved,but as the amplitude of the smaller eccentricity increases the strength grade of concrete to improve the ultimate bearing capacity.The thicker the steel pipe wall,steel ratio,the stronger the binding core concrete,the greater the force the same value of M can withstand seismic performance and ductility,the better.M-N curve analysis obtained by the numerical calculation of the specimen can quickly calculate the thickness of steel tube in the actual project,to facilitate the design of the T-shaped steel concrete core columns.
引文
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[10]Chen Zongping,Zhao Hongtie,Xue Jianyang,et al.Concrete cover thickness of SRC special-shaped col-umns[J].Journal of Harbin Institute of Technology,2005,37(2):181-184.
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[14]Han Linhai,Yao Guohuang,Chen Zhibo,et al.Ex-perimental behavior of steel tube confined concrete(STCC)columns[J].Steel and Concrete CompositeStructures,2005,5(6):459-484.
[15]石亦平,周玉蓉.ABAQUS有限元分析实例详解[M].北京:机械工程出版社,2009.(Shi Yiping,Zhou Yurong.Practical examples de-tailed explanation of ABAQUS finite element analy-sis[M].Beijing:M achinery Industry Press,2009.)
[16]清华大学,东南大学,天津大学,同济大学.混凝土结构设计原理[M].北京:中国工业出版社,2004.(Qinghua University,Southeast University,TianjinUniversity Tongji University Collaborating.Principlefor design of concrete structures[M].Beijing:ChinaArchitecture&Building Press,2004.)
[17]刁晓征.十字形截面钢骨混凝土偏压柱受力性能研究[D].沈阳:沈阳建筑大学,2009.(Diao Xiaozheng.Research force performance ofcriss-filled steel reinforced special shaped columnunder mono-directional eccentric compression[D].Shenyang:Shenyang Jianzhu University,2009.)
[18]徐亚丰,侯晓曦.偏压作用下L形钢骨混凝土异形柱的非线性分析[J].沈阳建筑大学学报:自然科学版,2010,26(3):511-515.(Xu Yafeng,Hou Xiaoxi.Nonlinear analysis on L-shaped steel reinforced concrete columns w ith eccen-tric compression[J].Journal of Shenyang Jianzhu U-niversity:Natural Science,2010,26(3):511-515.)
[19]徐亚丰,张宇博.L形钢管混凝土芯柱正截面承载力研究[J].沈阳建筑大学学报:自然科学版,2011,27(4):708-712.(Xu Yafeng,Zhang Yubo.Theoretical research oncapacity of normal cross section of L-shape concrete-filled steel tube core column[J].Journal of Sheny-ang Jianzhu University:Natural Science,2011,27(4):708-712.)
[2]韩林海,钟善桐.钢管混凝土力学[M].大连:大连理工大学出版社,1996.(Han Linhai,Zhong Santong.Concrete filled steeltube mechanics[M].Dalian:Dalian University ofTechnology Press Co.Ltd,1996.)
[3]欧智菁,陈宝春.钢管混凝土偏压构件受力性能实验分析[J].福建建筑高等专科学校学报,2001,3(2):69-71.(Ou Zhijing,Chen Baochun.Experiments on thecharacter of bearing pressure of concrete filled steeltubular members compressed eccentrically[J].Jour-nal of Fujian University of Technology,2001,3(2):69-71.)
[4]陈宝春,欧智菁,王来勇,等.钢管混凝土偏心受压承载力试验分析[J].福州大学学报,2002,30(6):838-844.(Chen Baochun,Ou Zhiqing,Wang Laiyong,et al.Experimental study on carrying capacity of concretefilled steel tubular column under eccentric load[J].Journal of Fuzhou University,2002,30(6):838-844.)
[5]Ben Young,Ehab E.Experimental investigation ofconcrete-filled cold-formed high strength stainlesssteel tube columns[J].Journal of ConstructionalSteel Research,2006,62:484-492.
[6]陈宝春,陈友杰,王来勇,等.钢管混凝土偏心受压应力-应变关系模型研究[J].中国公路学报,2004,17(1):24-28.(Chen Baochun,Chen Youjie,Wang Laiyong,et al.Study of stress-strain relation of concrete filled steeltubular eccentric compression column[J].ChinaJournal of Highw ay and Transport,2004,17(1):24-28.)
[7]杨有福,韩林海.圆钢管混凝土压弯构件荷载-位移滞回模型研究[J].地震工程与工程振动,2003,23(6):117-123.(Yang Youfu,Han Linhai.Research on load-dis-placement hysteretic model of concrete-filled circularsteel tubular beam-columns[J].Earthquake Engi-neering and Engineering Vibration,2003,23(6):117-123.)
[8]张素梅,郭兰慧,王玉银,等.方钢管高强混凝土偏压构件的试验研究与理论分析[J].建筑结构学报,2004,25(1):17-24.(Zhang Sumei,Guo Lanhui,Wang Yuyin,et al.Ex-perimental research and theoretical analysis of highstrength concrete filled square hollow section steeltubes subjected to eccentric loading[J].Journal ofBuilding Structures,2004,25(1):17-24.)
[9]Georgios G,Dennis L.Axial capacity of circular con-crete-filled-tube columns[J].Journal of Construc-tional Steel Research,2004,60:1049-1068.
[10]Chen Zongping,Zhao Hongtie,Xue Jianyang,et al.Concrete cover thickness of SRC special-shaped col-umns[J].Journal of Harbin Institute of Technology,2005,37(2):181-184.
[11]Xu Yafeng,He Fang,Xiang Changyan.The concep-tual design and innovation of the structure[J].SteelConstruction,2006(S):512-517.
[12]Chen Zongping,Zhao Hongtie,Xue Jianyang,et al.Shape steel layout analysis of SRC special-shapedcolumns[J].Journal of Harbin Institute of Technolo-gy,2005,27(2):128-131.
[13]Newman H M.Control networks and interoperability[J].Supplement to HPAC Engineering,2001,5:17-27.
[14]Han Linhai,Yao Guohuang,Chen Zhibo,et al.Ex-perimental behavior of steel tube confined concrete(STCC)columns[J].Steel and Concrete CompositeStructures,2005,5(6):459-484.
[15]石亦平,周玉蓉.ABAQUS有限元分析实例详解[M].北京:机械工程出版社,2009.(Shi Yiping,Zhou Yurong.Practical examples de-tailed explanation of ABAQUS finite element analy-sis[M].Beijing:M achinery Industry Press,2009.)
[16]清华大学,东南大学,天津大学,同济大学.混凝土结构设计原理[M].北京:中国工业出版社,2004.(Qinghua University,Southeast University,TianjinUniversity Tongji University Collaborating.Principlefor design of concrete structures[M].Beijing:ChinaArchitecture&Building Press,2004.)
[17]刁晓征.十字形截面钢骨混凝土偏压柱受力性能研究[D].沈阳:沈阳建筑大学,2009.(Diao Xiaozheng.Research force performance ofcriss-filled steel reinforced special shaped columnunder mono-directional eccentric compression[D].Shenyang:Shenyang Jianzhu University,2009.)
[18]徐亚丰,侯晓曦.偏压作用下L形钢骨混凝土异形柱的非线性分析[J].沈阳建筑大学学报:自然科学版,2010,26(3):511-515.(Xu Yafeng,Hou Xiaoxi.Nonlinear analysis on L-shaped steel reinforced concrete columns w ith eccen-tric compression[J].Journal of Shenyang Jianzhu U-niversity:Natural Science,2010,26(3):511-515.)
[19]徐亚丰,张宇博.L形钢管混凝土芯柱正截面承载力研究[J].沈阳建筑大学学报:自然科学版,2011,27(4):708-712.(Xu Yafeng,Zhang Yubo.Theoretical research oncapacity of normal cross section of L-shape concrete-filled steel tube core column[J].Journal of Sheny-ang Jianzhu University:Natural Science,2011,27(4):708-712.)
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