冷弯薄壁C型钢桁架螺栓连接节点刚度研究
|
摘要
冷弯型钢桁架中腹杆通常假定两端为铰接连接,然而对其节点的真实特性目前研究还不够充分,我国的设计规范没有考虑节点刚度。本文引用了国外的试验数据并对其进行了数值分析,目的在于研究冷弯型钢桁架中螺栓节点的真实特性。
本文利用大型有限元软件ANSYS10.0对单面搭接节点和T型节点进行了非线性有限元分析,所得的有限元计算结果与国外的试验结果吻合较好。在有限元模型中,文中考虑了不同螺栓直径和不同板件厚度对单面搭接节点刚度和T型节点刚度的影响。分析表明:板件厚度和螺栓直径是影响节点刚度的最主要因素。
在大量有限元分析的基础上,对螺栓连接的冷弯薄壁C型钢桁架节点的半刚性性能进行了研究。由于节点转动刚度对杆端提供了有利的转动约束,杆件的计算长度相应减小,因此节点半刚性对冷弯薄壁C型钢桁架的有利影响是显而易见的。根据有限元分析结果,拟合了考虑节点半刚性的构件计算长度公式。
The web members in cold-formed steel trusses are usually assumed to have pinned connections at the ends. However, the study of the real behavior of bolted joints is not sufficient at present. The related design rules have not considered stiffness of joints in Chinese code. Based on the latest experimental study abroad, this paper works some numerical analysis, aimed at evaluating the real behavior of bolted joints in cold-formed steel trusses.
In this paper the finite element program ANSYS10.0 is applied to carry out the finite nonlinear analysis of single lap joints and T-joints. The FEM models were then verified by the experimental results. In the FEM model of single lap joints and T-joints, the thickness of the plates and the effect of bolt diameter are considered. The result shows that the plate thickness and bolt diameter are main factors to influence the stiffness of joints.
Based on the finite element nonlinear analysis, the semi-rigid properties of joints in bolted connected cold-forme' steel trusses were studied. The buckling lengths of the web members will decreases, due to the rotational stiffness of joints providing rotational restraints at the end of web members. Consequently, the influence of semi-rigid joints to cold-formed steel truss is obvious. According to results of finite element analysis, a formula for calculating the buckling length of truss web members is fitted, which considers the influence of semi-rigid joints.
本文利用大型有限元软件ANSYS10.0对单面搭接节点和T型节点进行了非线性有限元分析,所得的有限元计算结果与国外的试验结果吻合较好。在有限元模型中,文中考虑了不同螺栓直径和不同板件厚度对单面搭接节点刚度和T型节点刚度的影响。分析表明:板件厚度和螺栓直径是影响节点刚度的最主要因素。
在大量有限元分析的基础上,对螺栓连接的冷弯薄壁C型钢桁架节点的半刚性性能进行了研究。由于节点转动刚度对杆端提供了有利的转动约束,杆件的计算长度相应减小,因此节点半刚性对冷弯薄壁C型钢桁架的有利影响是显而易见的。根据有限元分析结果,拟合了考虑节点半刚性的构件计算长度公式。
The web members in cold-formed steel trusses are usually assumed to have pinned connections at the ends. However, the study of the real behavior of bolted joints is not sufficient at present. The related design rules have not considered stiffness of joints in Chinese code. Based on the latest experimental study abroad, this paper works some numerical analysis, aimed at evaluating the real behavior of bolted joints in cold-formed steel trusses.
In this paper the finite element program ANSYS10.0 is applied to carry out the finite nonlinear analysis of single lap joints and T-joints. The FEM models were then verified by the experimental results. In the FEM model of single lap joints and T-joints, the thickness of the plates and the effect of bolt diameter are considered. The result shows that the plate thickness and bolt diameter are main factors to influence the stiffness of joints.
Based on the finite element nonlinear analysis, the semi-rigid properties of joints in bolted connected cold-forme' steel trusses were studied. The buckling lengths of the web members will decreases, due to the rotational stiffness of joints providing rotational restraints at the end of web members. Consequently, the influence of semi-rigid joints to cold-formed steel truss is obvious. According to results of finite element analysis, a formula for calculating the buckling length of truss web members is fitted, which considers the influence of semi-rigid joints.
引文
[1]AISI/COFS.Standard for cold-formed steel framing - Truss design,Revision of AISUCOFS/TRUSS 2000.American Iron and Steel Institute,Committee on Framing Standards(COFS).2001[1st printing June 2002]
[2]Raul Zaharia,Dan Dubina.Stiffness of joints in bolted connected cold-formed steel trusses.Journal of Constructional Steel Research 62(2006)240-249
[3]Ibrahim.Behavior of cold-formed steel roof trusses under concentrated loads.J Constr Steel Res.1998,Nov,176-7
[4]LaBoube RA,Yu WW.Research and developments in cold-formed steel framing.Thin WallStruct.1998,Nov,19-39
[5]Zadanfarrokh F,Bryan ER.Testing and designing of bolted connections in cold-formed steel sections.Eleventh international specialty conference on cold-formed steel structures,University of Missouri-Rolla,St.Louis,Missouri,U.S.A,1992
[6]Lim,Nethercot.Stiffness prediction for bolted moment -connections between cold-formed steel members.J Constr Steel Res.2004,Nov,85-107
[7]郝祁香,崔佳,黄川.自攻螺钉连接冷弯薄壁C型钢节点性能对压杆稳定承载力的影响.建筑结构增刊.2004
[8]钟国辉.螺栓连接的冷成型钢结构的结构性能.建筑钢结构进展.2007,Vol9No.1
[9]冷弯薄壁型钢结构技术规范(GB50018-2002).中国计划出版社.2002
[10]王明贵.钢结构住宅的发展研究.钢结构.2007,Vol.22 No.1 P.37-40
[11]Kestutis Urbonas,Alfonsas Daniunas.Behaviour of semi-rigid steel beam-to-beam joints under bending and axial forces.Journal of Constructional Steel Research 62(2006)1244-1249
[12]D.bina,R.aharia.Cold-Formed Steel Trusses with Semi-Rigid Joints.Thin-Walled Structures.1998,Vol.29
[13]Abdulkadir Cevik.Unified formulation for web crippling strength of cold-formed steel sheeting using stepwise regression.Journal of Constructional Steel Research 63(2007)1305-1316
[14]L.Fiorino,G.Della Corte,R.Landolfo.Experimental tests on typical screw connections for cold-formed steel housing.Engineering Structures 29(2007)1761-1773
[15]K.B.Katnam-*,R.Van Impe,G.Lagae,M.De Strycker.Atheoretical numerical study of the rotational restraint in cold - formed steel single skin purlin- sheeting systems.Computers and Structures 85(2007)1185-1193
[16]Yao-Jie Guoa0b0-*,Ai-Zhu Zhua,Yong-Lin Pib,Francis Tin-Loib.Experimental study on compressive strengths of thick-walled cold-formed sections.Journal of Constructional Steel Research 63(2007)718-723
[17]L.Xu-*,F.M.Tangorra,Experimental investigation of lightweight residential floors supported by cold-formed steel C 一 shape joists.Journal of Constructional Steel Research 63(2007)422-435
[18]R.F.Pedreschi-*,B.E Sinha,An experimental study of cold formed steel trusses using mechanical clinching,Construction and Building Materials(2007)
[19]Ibrahim H.Guzelbey,Abdulkadir Cevik-*,Ahmet Erklig,Prediction of web crippling strength of cold-formed steel sheetings using neural networks,Journal of Constructional Steel Research 62(2006)962-973
[20]Bhavani Shankar Lakkavalli,Yi Liu-*,Experimental study of composite cold-formed steel C 一 section floor joists.Journal of Constructional Steel Research 62(2006)995-1006
[21]Nabil Abdel-Rahman,K.S.Sivakumaran.Effective design width for perforated cold-formed steel compression members.Canadian Journal of Civil Engineering Apr 1998,25.2
[22]周绪红,石宇,周天华,刘永健,周期石,狄谨,卢林枫.低层冷弯薄壁型钢结构住宅体系,建筑科学与工程学报,2005,Vol.22.
[23]钟国辉.冷弯薄壁型钢在房屋建筑中的研究与发展.建筑钢结构进展,2002,Vol.4
[24]黄川,崔佳,龙莉萍.自攻螺钉连接冷弯薄壁C型钢梁柱节点试验及分析.重庆建筑大学学报.2003,Vol.25
[25]陈骥.钢结构稳定理论与设计.第三版.科学出版社.2006
[26]陈绍蕃.钢结构设计原理.第三版.科学出版社.2006
[27]白葳,喻海良.通用有限元分析ANSYS 8.0基础教程.清华大学出版社.2005
[28]尚晓江,邱峰,赵海峰,李文颖.ANSYS结构有限元高级分析方法与范例应用.中国水利水电出版社.2006
[29]曹宏.冷弯薄壁型钢结构在建筑工程中的应用.煤炭工程.2004,Vol.11
[30]于炜文.冷成型钢结构设计.知识产权出版.2003.
[31]闻新,周露,李翔,张宝伟.MATLAB神经网络仿真与应用.科学出版社.2003
[32]沈浩等.Excel高级应用与数据分析.电子工业出版社.2008
[2]Raul Zaharia,Dan Dubina.Stiffness of joints in bolted connected cold-formed steel trusses.Journal of Constructional Steel Research 62(2006)240-249
[3]Ibrahim.Behavior of cold-formed steel roof trusses under concentrated loads.J Constr Steel Res.1998,Nov,176-7
[4]LaBoube RA,Yu WW.Research and developments in cold-formed steel framing.Thin WallStruct.1998,Nov,19-39
[5]Zadanfarrokh F,Bryan ER.Testing and designing of bolted connections in cold-formed steel sections.Eleventh international specialty conference on cold-formed steel structures,University of Missouri-Rolla,St.Louis,Missouri,U.S.A,1992
[6]Lim,Nethercot.Stiffness prediction for bolted moment -connections between cold-formed steel members.J Constr Steel Res.2004,Nov,85-107
[7]郝祁香,崔佳,黄川.自攻螺钉连接冷弯薄壁C型钢节点性能对压杆稳定承载力的影响.建筑结构增刊.2004
[8]钟国辉.螺栓连接的冷成型钢结构的结构性能.建筑钢结构进展.2007,Vol9No.1
[9]冷弯薄壁型钢结构技术规范(GB50018-2002).中国计划出版社.2002
[10]王明贵.钢结构住宅的发展研究.钢结构.2007,Vol.22 No.1 P.37-40
[11]Kestutis Urbonas,Alfonsas Daniunas.Behaviour of semi-rigid steel beam-to-beam joints under bending and axial forces.Journal of Constructional Steel Research 62(2006)1244-1249
[12]D.bina,R.aharia.Cold-Formed Steel Trusses with Semi-Rigid Joints.Thin-Walled Structures.1998,Vol.29
[13]Abdulkadir Cevik.Unified formulation for web crippling strength of cold-formed steel sheeting using stepwise regression.Journal of Constructional Steel Research 63(2007)1305-1316
[14]L.Fiorino,G.Della Corte,R.Landolfo.Experimental tests on typical screw connections for cold-formed steel housing.Engineering Structures 29(2007)1761-1773
[15]K.B.Katnam-*,R.Van Impe,G.Lagae,M.De Strycker.Atheoretical numerical study of the rotational restraint in cold - formed steel single skin purlin- sheeting systems.Computers and Structures 85(2007)1185-1193
[16]Yao-Jie Guoa0b0-*,Ai-Zhu Zhua,Yong-Lin Pib,Francis Tin-Loib.Experimental study on compressive strengths of thick-walled cold-formed sections.Journal of Constructional Steel Research 63(2007)718-723
[17]L.Xu-*,F.M.Tangorra,Experimental investigation of lightweight residential floors supported by cold-formed steel C 一 shape joists.Journal of Constructional Steel Research 63(2007)422-435
[18]R.F.Pedreschi-*,B.E Sinha,An experimental study of cold formed steel trusses using mechanical clinching,Construction and Building Materials(2007)
[19]Ibrahim H.Guzelbey,Abdulkadir Cevik-*,Ahmet Erklig,Prediction of web crippling strength of cold-formed steel sheetings using neural networks,Journal of Constructional Steel Research 62(2006)962-973
[20]Bhavani Shankar Lakkavalli,Yi Liu-*,Experimental study of composite cold-formed steel C 一 section floor joists.Journal of Constructional Steel Research 62(2006)995-1006
[21]Nabil Abdel-Rahman,K.S.Sivakumaran.Effective design width for perforated cold-formed steel compression members.Canadian Journal of Civil Engineering Apr 1998,25.2
[22]周绪红,石宇,周天华,刘永健,周期石,狄谨,卢林枫.低层冷弯薄壁型钢结构住宅体系,建筑科学与工程学报,2005,Vol.22.
[23]钟国辉.冷弯薄壁型钢在房屋建筑中的研究与发展.建筑钢结构进展,2002,Vol.4
[24]黄川,崔佳,龙莉萍.自攻螺钉连接冷弯薄壁C型钢梁柱节点试验及分析.重庆建筑大学学报.2003,Vol.25
[25]陈骥.钢结构稳定理论与设计.第三版.科学出版社.2006
[26]陈绍蕃.钢结构设计原理.第三版.科学出版社.2006
[27]白葳,喻海良.通用有限元分析ANSYS 8.0基础教程.清华大学出版社.2005
[28]尚晓江,邱峰,赵海峰,李文颖.ANSYS结构有限元高级分析方法与范例应用.中国水利水电出版社.2006
[29]曹宏.冷弯薄壁型钢结构在建筑工程中的应用.煤炭工程.2004,Vol.11
[30]于炜文.冷成型钢结构设计.知识产权出版.2003.
[31]闻新,周露,李翔,张宝伟.MATLAB神经网络仿真与应用.科学出版社.2003
[32]沈浩等.Excel高级应用与数据分析.电子工业出版社.2008