高强冷弯薄壁型钢单面覆板墙体立柱轴压性能试验研究
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摘要
本文对6根550MPa高强冷弯薄壁型钢单面覆带肋钢板墙体立柱试件进行了足尺轴压试验,得到了立柱的极限承载力及破坏模态。通过试验发现:立柱大多发生弯扭失稳破坏;试验加载过程中,立柱均出现了畸变屈曲现象,部分立柱还出现了局部屈曲,发生了畸变屈曲与局部屈曲的相关作用。
本文在试验基础上,采用大型通用有限元软件ANSYS对单面覆带肋钢板高强冷弯薄壁型钢轴压墙体立柱进行了非线性数值模拟分析,所得有限元计算结果与试验结果吻合较好。为了全面了解单面覆板高强冷弯薄壁型钢墙体立柱的轴压性能,在此基础上,进行了参数分析,模拟了不同墙面板材、螺钉间距、水平扁钢拉条、钢板接缝以及立柱截面尺寸等因素对墙体立柱极限承载力的影响。
本文利用立柱轴压极限承载力及其失稳模式,通过分析、计算得到了单面覆带肋钢板墙体立柱计算长度系数μ_x值。为了便于工程设计,给出了立柱计算长度系数μ_x的设计建议取值。利用立柱计算长度系数μ_x设计建议值,通过本文建议方法计算得到立柱承载力,并与试验值和有限元计算值进行比较。由比较结果可知,利用本文建议方法计算单面覆带肋钢板高强冷弯薄壁型钢墙体立柱轴压承载力是安全的。
A group of six full-size 550MPa high strength cold-formed steel framing wall studs with single steel rib panel were tested under axial compression loading. The ultimate load-carrying capacity and failure modes of all wall studs were obtained from the test. Also, it was found from the test that flexural-torsional buckling is the main failure mode of the wall studs. During the test, distortional bucking occurred in all the wall studs and the interaction between local and distortional bucking happened.
Based on the test, the finite element program ANSYS is applied to carry out the finite element nonlinear analysis of the framing wall studs with single steel rib panel under axial compression loading. Ultimate load-carrying capacity of the finite element method agrees well with the test data. In order to fully understand the behavior of the framing wall studs with single panel, a detailed parametric study, including the type of panels, the spacing of screws, the plate strips, the seam construction of steel rib panel and the section size of wall studs, is analyzed in the paper.
Effective length factorμ_x is obtained based on ultimate load-carrying capacity and failure modes of the wall studs with single steel rib panel. In order to be applied to project design, the values of effective length factorμ_x are suggested. Also, a new method of calculating ultimate load-carrying capacity of the wall studs is provided. Based on the comparing the calculated load-carrying capacity of the wall studs by use of the new method and the suggested values ofμ_x with the test results, it shows that the suggested method for calculating the load-carrying capacity of the wall studs with single steel rib panel is feasible and valid.
本文在试验基础上,采用大型通用有限元软件ANSYS对单面覆带肋钢板高强冷弯薄壁型钢轴压墙体立柱进行了非线性数值模拟分析,所得有限元计算结果与试验结果吻合较好。为了全面了解单面覆板高强冷弯薄壁型钢墙体立柱的轴压性能,在此基础上,进行了参数分析,模拟了不同墙面板材、螺钉间距、水平扁钢拉条、钢板接缝以及立柱截面尺寸等因素对墙体立柱极限承载力的影响。
本文利用立柱轴压极限承载力及其失稳模式,通过分析、计算得到了单面覆带肋钢板墙体立柱计算长度系数μ_x值。为了便于工程设计,给出了立柱计算长度系数μ_x的设计建议取值。利用立柱计算长度系数μ_x设计建议值,通过本文建议方法计算得到立柱承载力,并与试验值和有限元计算值进行比较。由比较结果可知,利用本文建议方法计算单面覆带肋钢板高强冷弯薄壁型钢墙体立柱轴压承载力是安全的。
A group of six full-size 550MPa high strength cold-formed steel framing wall studs with single steel rib panel were tested under axial compression loading. The ultimate load-carrying capacity and failure modes of all wall studs were obtained from the test. Also, it was found from the test that flexural-torsional buckling is the main failure mode of the wall studs. During the test, distortional bucking occurred in all the wall studs and the interaction between local and distortional bucking happened.
Based on the test, the finite element program ANSYS is applied to carry out the finite element nonlinear analysis of the framing wall studs with single steel rib panel under axial compression loading. Ultimate load-carrying capacity of the finite element method agrees well with the test data. In order to fully understand the behavior of the framing wall studs with single panel, a detailed parametric study, including the type of panels, the spacing of screws, the plate strips, the seam construction of steel rib panel and the section size of wall studs, is analyzed in the paper.
Effective length factorμ_x is obtained based on ultimate load-carrying capacity and failure modes of the wall studs with single steel rib panel. In order to be applied to project design, the values of effective length factorμ_x are suggested. Also, a new method of calculating ultimate load-carrying capacity of the wall studs is provided. Based on the comparing the calculated load-carrying capacity of the wall studs by use of the new method and the suggested values ofμ_x with the test results, it shows that the suggested method for calculating the load-carrying capacity of the wall studs with single steel rib panel is feasible and valid.
引文
[1]中华人民共和国国家标准《冷弯薄壁型钢结构技术规范》GB50018-2002[S].北京:中国计划出版社,2002.
[2]Gilesg Green.Light Gauge Steel Columns in Wall-Braced Panels.Bulletin No.35,part2,Engineering Experiment Station,Comell University,1947,10.
[3]Winter George.Lateral Bracing of Columns and Beams.Transactions ASCE,Vol.125,1960.
[4]Larson M A.Discussion of "Lateral Bracing of Columns and Beams".Transactions ASCE,Vol.125,1960.
[5]Pineus G,Fisher G P.Behavior of Diaphragm-Braced Columns and Beams.Journal of Structural Division,Proceedings ASCE,1966,92(2).
[6]Errera S J.The Performance of Beams and Columns Continuously Braced with Diaphragm.Report No.321,Department of Structure Engineering Connell University,October,1965.
[7]Apparao T V S R.Problems in Structural Diaphragm Bracing.Report No.331,Department of Structural Engineering,Comell University,April,1968.
[8]Apparao T V S R.,Errera S J.Design Recommendations for Diaphragm-Braced Beams,Columns and Wall-Studs.Comell University,October,1968.
[9]Simaan A.Buckling of Diaphragm-Braced Columns of Unsymmetrical Sections and Application to Wall Studs Design.Rep.No.353,Dept.of Struct.Engrg.,School of Civ.and Envir.Engrg.,Comell University,1973.
[10]Simaan A.Buckling of Diaphragm-Braced Columns of Unsymmetrical Sections and Application to Wall Studs Design.PhD thesis,Cornell University,1973.
[11]Simaan A,Pekoz T A.Diaphragm Braced Members and Design of Wall Studs.Journal of Structural Division.Proceedings of American Society of Civil Engineers,1976,102(1):77-93.
[12]Schurter P G,Schuster R M and Zakrzewski A S.Combined Compression and Lateral Loads on Load Bearing Steel Stud Walls.Proceedings of sixth Speciality Conference on Cold-Formed Steel Structures,1982:431-448.
[13]Specification for the Design of Cold-Formed Steel Structural Members.Washington:American Iron and Steel Institute,1980.
[14]Zhang Yaochun.An Exploratory Study on the Behavior of Cold-Formed Steel Wall Studs.Report No.82-14,Department of Structural Engineering,Cornell University,September,19820
[15]Miller T H,Pekoz T A.Behavior of Cold-Formed Steel Wall Stud Assemblies.Journal of Structural Engineering,ASCE,1993,119(2):641-651.
[16]Miller T H,Pekoz T A.Behavior of Gypsum-Sheathed Cold-Formed Steel Wall Studs.Journal of Structural Engineering,ASCE,1994,120(5):1644-1650.
[17]Miller T H,Pekoz T A.Unstiffened Strip Approach for Perforated Wall Studs.Journal of Structural Engineering,ASCE,1994,120(2):410-421.
[18]Miller T H.Behavior of Cold-Formed Steel Wall Stud Assemblies Subject to Eccentric Axial Loads.PhD thesis,Cornell University,1990.
[19]Young-ki Lee,Miller T H.Axial Strength Determination for Gypsum-Sheathed,Cold-Formed Steel Wall Stud Composite.Panels.Journal of Structural Engineering,ASCE,2001,127(6):608-615.
[20]Young-ki Lee,Behavior of Gypsum-Sheathed Cold-Formed Steel Wall Stud Panels.PhD thesis,Oregon State University,Corvallis,Oreg.1999.
[21]Stephen P.Timoshenko,James M.Gere.Theory of Elastic Stability,Second Edition,McGRAW-HILL BOOK COMPANY,INC.1961.
[22]上海市建筑产品推荐性应用标准《MB-1轻钢龙骨体系低层装配式房屋技术规程》DBJ/CT011-2001[S],上海,2001.
[23]钟亚军.冷弯型钢低层住宅房屋体系墙体立柱的性能研究[D].西安:西安建筑科技大学,2003.
[24]刘前进,何保康等.低层冷弯薄壁型钢房屋墙体立柱承载力试验研究.钢结构,2004(4):26-29.
[25]秦雅菲,张其林等.冷弯薄壁型钢墙柱骨架的轴压性能试验研究和设计建议.建筑结构学报,2006,27(3):34-41.
[26]杨松岭.550MPa高强冷弯薄壁型钢轴压墙体立柱承载能力试验研究[D].西安:西安建筑科技大学,2007.
[27]中华人民共和国国家标准《金属材料—室温拉伸试验方法》GBT228-2002[S],eqv IS06892:1998.
[28]王春刚,张耀春,张壮男.冷弯薄壁斜卷边槽钢受压构件的承载力试验研究.建筑结构学报,2006,27(3):1-9.
[29]何保康,周天华,王彦敏.550MPa高强冷弯薄壁型钢墙体立柱承载力试验研究报告.西安:西安建筑科技大学,2006.
[30]姜勇,张波.ANSYS7.0实例精解.北京:清华大学出版社,2004.
[31]祝效华,余志祥等.ANSYS高级工程有限元分析范例精选.北京:电子工业出版社,2004.
[32]鹤山.ANSYS在建筑工程中的应用.北京:机械工业出版社,2005.
[33]郝文化,叶裕明,刘春山等.ANSYSi木工程应用实例.北京:中国水利水电出版社,2005.
[34]白葳,喻海良.通用有限元分析ANSYS8.0基础教程.北京:清华大学出版,2005.
[35]周绪红,石宇,周天华等.冷弯薄壁型钢结构住宅组合墙体受剪性能研究.建筑结构学报,2006,27(3):4247.
[36]周天华,何保康,周绪红等.高强冷弯薄壁型钢轴压短柱受力性能试验研究.建筑科学与工程学报,2005,22(3):36-44.
[37]周天华,何保康,周绪红等.高强冷弯薄壁型钢轴压长柱受力性能试验研究.建筑科学与工程学报,2005,22(4):65-71.
[38]陈绍蕃.钢结构稳定设计指南(第二版).北京:科学出版社,1998.
[39]Von Karma.n,T E E.Sechler.The Strength of Thin Plate in Compression.Transactions ASME,Vol.54,APM 54-5,1932.
[40]陈绍蕃.卷边槽钢的局部相关屈曲和畸变屈曲.建筑结构学报,2002,23(1):27-31.
[41]陈骥.钢结构稳定理论与设计(第二版).北京:中国科学出版社,2003.
[42]刘艳军.550MPa高强冷弯薄壁型钢轴压构件试验及非线性有限元分析[D].西安:西安建筑科技大学,2007.
[43]Specification for the Design of Cold-Formed Steel Structural Members.Washington:American Iron and Steel Institute,1996.
[2]Gilesg Green.Light Gauge Steel Columns in Wall-Braced Panels.Bulletin No.35,part2,Engineering Experiment Station,Comell University,1947,10.
[3]Winter George.Lateral Bracing of Columns and Beams.Transactions ASCE,Vol.125,1960.
[4]Larson M A.Discussion of "Lateral Bracing of Columns and Beams".Transactions ASCE,Vol.125,1960.
[5]Pineus G,Fisher G P.Behavior of Diaphragm-Braced Columns and Beams.Journal of Structural Division,Proceedings ASCE,1966,92(2).
[6]Errera S J.The Performance of Beams and Columns Continuously Braced with Diaphragm.Report No.321,Department of Structure Engineering Connell University,October,1965.
[7]Apparao T V S R.Problems in Structural Diaphragm Bracing.Report No.331,Department of Structural Engineering,Comell University,April,1968.
[8]Apparao T V S R.,Errera S J.Design Recommendations for Diaphragm-Braced Beams,Columns and Wall-Studs.Comell University,October,1968.
[9]Simaan A.Buckling of Diaphragm-Braced Columns of Unsymmetrical Sections and Application to Wall Studs Design.Rep.No.353,Dept.of Struct.Engrg.,School of Civ.and Envir.Engrg.,Comell University,1973.
[10]Simaan A.Buckling of Diaphragm-Braced Columns of Unsymmetrical Sections and Application to Wall Studs Design.PhD thesis,Cornell University,1973.
[11]Simaan A,Pekoz T A.Diaphragm Braced Members and Design of Wall Studs.Journal of Structural Division.Proceedings of American Society of Civil Engineers,1976,102(1):77-93.
[12]Schurter P G,Schuster R M and Zakrzewski A S.Combined Compression and Lateral Loads on Load Bearing Steel Stud Walls.Proceedings of sixth Speciality Conference on Cold-Formed Steel Structures,1982:431-448.
[13]Specification for the Design of Cold-Formed Steel Structural Members.Washington:American Iron and Steel Institute,1980.
[14]Zhang Yaochun.An Exploratory Study on the Behavior of Cold-Formed Steel Wall Studs.Report No.82-14,Department of Structural Engineering,Cornell University,September,19820
[15]Miller T H,Pekoz T A.Behavior of Cold-Formed Steel Wall Stud Assemblies.Journal of Structural Engineering,ASCE,1993,119(2):641-651.
[16]Miller T H,Pekoz T A.Behavior of Gypsum-Sheathed Cold-Formed Steel Wall Studs.Journal of Structural Engineering,ASCE,1994,120(5):1644-1650.
[17]Miller T H,Pekoz T A.Unstiffened Strip Approach for Perforated Wall Studs.Journal of Structural Engineering,ASCE,1994,120(2):410-421.
[18]Miller T H.Behavior of Cold-Formed Steel Wall Stud Assemblies Subject to Eccentric Axial Loads.PhD thesis,Cornell University,1990.
[19]Young-ki Lee,Miller T H.Axial Strength Determination for Gypsum-Sheathed,Cold-Formed Steel Wall Stud Composite.Panels.Journal of Structural Engineering,ASCE,2001,127(6):608-615.
[20]Young-ki Lee,Behavior of Gypsum-Sheathed Cold-Formed Steel Wall Stud Panels.PhD thesis,Oregon State University,Corvallis,Oreg.1999.
[21]Stephen P.Timoshenko,James M.Gere.Theory of Elastic Stability,Second Edition,McGRAW-HILL BOOK COMPANY,INC.1961.
[22]上海市建筑产品推荐性应用标准《MB-1轻钢龙骨体系低层装配式房屋技术规程》DBJ/CT011-2001[S],上海,2001.
[23]钟亚军.冷弯型钢低层住宅房屋体系墙体立柱的性能研究[D].西安:西安建筑科技大学,2003.
[24]刘前进,何保康等.低层冷弯薄壁型钢房屋墙体立柱承载力试验研究.钢结构,2004(4):26-29.
[25]秦雅菲,张其林等.冷弯薄壁型钢墙柱骨架的轴压性能试验研究和设计建议.建筑结构学报,2006,27(3):34-41.
[26]杨松岭.550MPa高强冷弯薄壁型钢轴压墙体立柱承载能力试验研究[D].西安:西安建筑科技大学,2007.
[27]中华人民共和国国家标准《金属材料—室温拉伸试验方法》GBT228-2002[S],eqv IS06892:1998.
[28]王春刚,张耀春,张壮男.冷弯薄壁斜卷边槽钢受压构件的承载力试验研究.建筑结构学报,2006,27(3):1-9.
[29]何保康,周天华,王彦敏.550MPa高强冷弯薄壁型钢墙体立柱承载力试验研究报告.西安:西安建筑科技大学,2006.
[30]姜勇,张波.ANSYS7.0实例精解.北京:清华大学出版社,2004.
[31]祝效华,余志祥等.ANSYS高级工程有限元分析范例精选.北京:电子工业出版社,2004.
[32]鹤山.ANSYS在建筑工程中的应用.北京:机械工业出版社,2005.
[33]郝文化,叶裕明,刘春山等.ANSYSi木工程应用实例.北京:中国水利水电出版社,2005.
[34]白葳,喻海良.通用有限元分析ANSYS8.0基础教程.北京:清华大学出版,2005.
[35]周绪红,石宇,周天华等.冷弯薄壁型钢结构住宅组合墙体受剪性能研究.建筑结构学报,2006,27(3):4247.
[36]周天华,何保康,周绪红等.高强冷弯薄壁型钢轴压短柱受力性能试验研究.建筑科学与工程学报,2005,22(3):36-44.
[37]周天华,何保康,周绪红等.高强冷弯薄壁型钢轴压长柱受力性能试验研究.建筑科学与工程学报,2005,22(4):65-71.
[38]陈绍蕃.钢结构稳定设计指南(第二版).北京:科学出版社,1998.
[39]Von Karma.n,T E E.Sechler.The Strength of Thin Plate in Compression.Transactions ASME,Vol.54,APM 54-5,1932.
[40]陈绍蕃.卷边槽钢的局部相关屈曲和畸变屈曲.建筑结构学报,2002,23(1):27-31.
[41]陈骥.钢结构稳定理论与设计(第二版).北京:中国科学出版社,2003.
[42]刘艳军.550MPa高强冷弯薄壁型钢轴压构件试验及非线性有限元分析[D].西安:西安建筑科技大学,2007.
[43]Specification for the Design of Cold-Formed Steel Structural Members.Washington:American Iron and Steel Institute,1996.