方钢管混凝土组合异形柱轴压承载力计算方法研究
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摘要
钢管混凝土结构计算方法较多,不同的规范规程之间计算公式均不相同,而且均没有针对方钢管混凝土组合异形柱的计算方法.因此本文首先总结近10年的14组方钢管混凝土组合异形柱轴压试验数据,依据ANSI/AISC360-05、GB50936、CECS159和DB29的计算方法分别推导了针对异形柱的计算公式,并在DB29叠加理论的基础上,提出了基于单肢失稳的叠加承载力计算方法 ADVANCED.通过不同计算方法得到的极限承载力值与试验值进行比较,发现本文基于不同规范推导的承载力计算公式得到的计算结果与试验结果吻合良好;GB50936和DB29计算得到的数值均比试验值小,偏于安全,但是误差偏大;LRFD和CECS159的误差较小,但是试验承载力值小于计算值,因此偏于不安全;ADVANCED计算方法误差较小,且大部分计算值低于试验值,结果偏于安全,而且计算简单易行,推荐采用.
The axial load-bearing capacity of concrete-filled steel tubular structures can be calculated using numerous methods employing different codes and standards.However,a calculation method for the special-shaped column composed of concrete-filled square steel tubes(SCFST column)is not yet available.Thus,this paper first evaluated the approximate 10-year test data of the axial loads of 14 groups of SCFST columns.Calculation methods based on four national or local standards,namely,ANSI/AISC 360-05,GB50936,CECS159,and DB29 were proposed.Another calculation method based on mono-column instability,which we called the ADVANCED method,was then proposed.The ultimate bearing-capacity and experimental values obtained by the different calculation methods were compared.The comparison revealed that the calculated result obtained by deducting the calculation formula of the bearing capacity based on different standards in this paper agreed with the experimental value. Numerical values obtained through both GB50936 and DB29 calculation methods were less than the experimental values;thus,these methods were partially safe but with insufficiently large errors.Errors in load and resistance factor design(LRFD)and CECS159 were considerably insignificant,although most numerical values were larger than the experimental bearing-capacity value,thereby making them partially unsafe.Errors in the ADVANCED method were considerably insignificant,and the numerical results were less than the experimental value.These results indicated that the ADVANCED method is safe,and thus recommended.
The axial load-bearing capacity of concrete-filled steel tubular structures can be calculated using numerous methods employing different codes and standards.However,a calculation method for the special-shaped column composed of concrete-filled square steel tubes(SCFST column)is not yet available.Thus,this paper first evaluated the approximate 10-year test data of the axial loads of 14 groups of SCFST columns.Calculation methods based on four national or local standards,namely,ANSI/AISC 360-05,GB50936,CECS159,and DB29 were proposed.Another calculation method based on mono-column instability,which we called the ADVANCED method,was then proposed.The ultimate bearing-capacity and experimental values obtained by the different calculation methods were compared.The comparison revealed that the calculated result obtained by deducting the calculation formula of the bearing capacity based on different standards in this paper agreed with the experimental value. Numerical values obtained through both GB50936 and DB29 calculation methods were less than the experimental values;thus,these methods were partially safe but with insufficiently large errors.Errors in load and resistance factor design(LRFD)and CECS159 were considerably insignificant,although most numerical values were larger than the experimental bearing-capacity value,thereby making them partially unsafe.Errors in the ADVANCED method were considerably insignificant,and the numerical results were less than the experimental value.These results indicated that the ADVANCED method is safe,and thus recommended.
引文
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[17]AISI 360-05-2005.Code for the Design of Steel Structures[S].United States:AISI,2005.
[18]CECS 28-2012钢管混凝土结构技术规程[S].北京:中国计划出版社,2012.CECS 28-2012 Technical Specification for Concrete Filled Steel Tubular Structure[S].Beijing:China Planning Press,2012(in Chinese)
[19]CECS 159-2004矩形钢管混凝土结构技术规程[S].北京:中国计划出版社,2004.CECS 159-2004 Technical Specification for Structures with Concrete-filled Rectangular Steel Tubular Members[S].Beijing:China Planning Press,2004(in Chinese).
[20]Xu M Y,Zhou T,Chen Z H,et al.Experimental study of slender LCFST columns connected by steel linking plates[J].Journal of Constructional Steel Research,2016,127:231-241.
[21]荣斌.方钢管混凝土组合异形柱的理论分析与试验研究[D].天津:天津大学建筑工程学院,2008.Rong Bin.Theoretical Analysis and Experimental Study on Special-shaped Column Composed of Concrete-filled Square Steel Tubes[D].Tianjin:School of Civil Engineering,Tianjin University,2008(in Chinese).
[2]Zuo Z L,Cai J,Yang C,et al.Eccentric load behavior of L-shaped CFT stub columns with binding bars[J].Journal of Constructional Steel Research,2012,72:105-118.
[3]Patton M.Longshithung S,Konjengbam D.Numerical modeling of lean duplex stainless steel hollow columns of square,L-,T-,and plus-shaped cross sections under pure axial compression[J].Thin-Walled Structures,2012,53:1-8.
[4]Yang Y L,Yang H,Zhang S M.Compressive behavior of T-shaped concrete filled steel tubular columns[J].International Journal of Steel Structures,2010,10(4):419-430.
[5]Chen Z Y,Shen Z Y.Behavior of L-shaped concretefilled steel stub columns under axial loading:Experiment[J].Advanced Steel Construction,2010,6(2):688-697.
[6]陈志华,李振宇,荣彬,等.十字形截面方钢管混凝土组合异形柱轴压承载力试验[J].天津大学学报(自然科学与工程技术版),2006,39(11):1275-1282.Chen Zhihua,Li Zhenyu,Rong Bin,et al.Experiment of axial compression bearing capacity for crisscross section special-shaped column composed of concretefilled square steel tubes[J].Journal of Tianjin University(Nature Science and Engineering),2006,39(11):1275-1282(in Chinese).
[7]陈志华,荣彬.L形方钢管混凝土组合异形柱的轴压稳定性研究[J].建筑结构,2009,39(6):39-42.Chen Zhihua,Rong Bin.Research on axial compression stability of L-shaped column composed of concrete-filled square steel tubes[J].Building Structure,2009,39(6):39-42(in Chinese).
[8]荣彬,陈志华,周婷.L形方钢管混凝土组合异形短柱的轴压强度研究[J].工业建筑,2009,39(11):104-107.Rong Bin,Chen Zhihua,Zhou Ting.Research on axial compression strength of L-shaped short column composed of concrete-filled square steel tubes[J].Industrial Construction,2009,39(11):104-107(in Chinese).
[9]Chen Z H,Rong B,Apostolos F.Axial compression stability of a crisscross section column composed of concrete-filled square steel tubes[J].Journal of Mechanics of Materials and Structures,2009,4(10):1787-1799.
[10]Chen Z H,Zhou T,Wang X D.Application of special shaped column composed of concrete-filled steel tubes[J].Advanced Materials Research,2011,163/164/165/166/167:196-199.
[11]Zhou T,Chen Z H,Liu H B.Nonlinear finite element analysis of concrete-filled steel tubular column[C]//Proceedings of 2011 International Conference on Electric Technology and Civil Engineering:ICETCE 2011,2011:2396-2399.
[12]Zhou T,Chen Z H,Liu H B.Seismic behavior of special shaped column composed of concrete filled steel tubes[J].Journal of Constructional Steel Research,2012,75:131-141.
[13]周婷,陈志华.方钢管混凝土组合异形柱抗震性能有限元分析[J].哈尔滨工业大学学报,2011,43:29-32.Zhou Ting,Chen Zhihua.The finite element analysis of seismic behavior of special-shaped column composed of concrete-filled square steel tubes[J].Journal of Harbin Institute of Technology,2011,43:29-32(in Chinese).
[14]周婷,陈志华,刘红波,等.汶川县映秀镇方钢管混凝土异形柱结构抗震性能研究[J].振动与冲击,2012,31(4):145-150.Zhou Ting,Chen Zhihua,Liu Hongbo,et al.Seismic performance of SCFT structure in Yingxiu,Wenchuan[J].Journal of Vibration and Shock,2012,31(4):145-150(in Chinese).
[15]中国建筑科学研究院.JGJ 209-2010轻型钢结构住宅技术规程[S].北京:中国建筑工业出版社,2010.China Academy of Building Research.JGJ 209-2010Technical Specification for Lightweight Residential Buildings of Steel Structure[S].Beijing:China Building Industry Press,2010(in Chinese).
[16]天津大学建筑设计院.DB29-57-2003天津市钢结构住宅设计规程[S].天津:天津大学出版社,2003.Tianjin University Architectural Design Institute.DB29-57-2003 Tianjin Design Specification for Steel Structure of Residential Buildings[S].Tianjin:Tianjin University Press,2003(in Chinese).
[17]AISI 360-05-2005.Code for the Design of Steel Structures[S].United States:AISI,2005.
[18]CECS 28-2012钢管混凝土结构技术规程[S].北京:中国计划出版社,2012.CECS 28-2012 Technical Specification for Concrete Filled Steel Tubular Structure[S].Beijing:China Planning Press,2012(in Chinese)
[19]CECS 159-2004矩形钢管混凝土结构技术规程[S].北京:中国计划出版社,2004.CECS 159-2004 Technical Specification for Structures with Concrete-filled Rectangular Steel Tubular Members[S].Beijing:China Planning Press,2004(in Chinese).
[20]Xu M Y,Zhou T,Chen Z H,et al.Experimental study of slender LCFST columns connected by steel linking plates[J].Journal of Constructional Steel Research,2016,127:231-241.
[21]荣斌.方钢管混凝土组合异形柱的理论分析与试验研究[D].天津:天津大学建筑工程学院,2008.Rong Bin.Theoretical Analysis and Experimental Study on Special-shaped Column Composed of Concrete-filled Square Steel Tubes[D].Tianjin:School of Civil Engineering,Tianjin University,2008(in Chinese).