扣件式钢管模板支架节点半刚性受扭机制试验研究
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摘要
扣件式钢管模板支架因其搭设灵活、拆除方便、通用性强、承载力大、经济性好等优点,在我国建筑施工模板支撑体系中起着主导作用。但近年来模板支架倒塌事故频繁发生,造成大量社会反响极其恶劣的严重后果。究其原因主要是由于该结构体系设计理论的不足和对模板支架受力性能认识的不全面,导致其设计与搭设不够科学,同时施工管理的混乱和材料质量本身的缺陷,也是引起事故的原因。因此,对扣件式钢管模板支架受力性能进行研究具有重要的工程价值。
在对近年历次重大脚手架和模板支撑架安全事故的诱因深入分析的基础上,明确了当前研究的主要不足在于忽略了扣件节点的半刚性受扭机制,以此确定了本文研究的内容,具体采用理论分析、试验与数值模拟相结合的研究方法。
为了验证直角扣件节点的抗扭转性能,本文对直角扣件进行了试验研究,试验以盖板螺栓紧固扭矩为主要研究参数,并考虑扣件制作工艺、材料质量等可能造成扣件性能离散的因素,完成了多层次、高试件量的试验工作,针对不同工况较地全面地获得了扣件节点半刚性受扭机制的性能数据。
在对试验结果详细分析和比较的基础上,根据试验数据的拟合结果,建立了用以解释扣件节点半刚性受扭机制的力学分析模型,并提出了适用于工程实践的简化的M-θ公式,并将其与试验结果及其他研究者已提出的分析模型进行了对比研究。
为进一步明确扣件节点的半刚性受扭工作机理及其对模板支架整体性能的影响程度,采用大型通用有限元程序ANSYS建立了考虑材料非线性和接触非线性的扣件节点三维实体精细化模型和扣件式钢管模板支架的整体模型,以此进行了仿真分析。并特别将扣件节点的仿真结果与试验结果进行了对比研究。
在上述工作的基础上,提出了该领域需进一步研究的问题。
Fastener-style tubular steel scaffold has widely used in building construction, beeause it has a number of advantages, including:simple detail, versatile, applicable to a wide range, high carrying capacity and relatively inexpensive. But the collapse accidents of scaffold structures are occurred frenquently in recent years, and caused serious casualties and economic loss. The major reasons are that deficiency of design philosophy and the comprehensive understanding of the mechanical behavior of eouPler-stylesteel tubular formwork supports has still not be built, which resulted in the improper configurations of those formwork supports failed before. At the same time, the shortage of construction management and stuff quality are still the factors of the collapse accidents. Therefore the investigation on coupler-style steel tubular formwork supports has important theoretic and practice value.
This dissertation enumerated a lot of the collapse accidents of scaffold structures in recent years, It was cleared that an important deficiency of current researches is the ignored the semi-rigid node torsion mechanism,which determined the contents of this paper. The specific use of theoretical analysis, experimental and numerical simulation methods of combining.
To verify the torsion properties of right-angle fastener, we are studied rectangular fastener in this paper, Cover bolt torque is the main parameters of the test, And consider the fastener manufacturing process, quality of materials, which may cause the performance of discrete fastener elements, to complete a multi-level, high-volume sample test work, and different conditions for a more comprehensive access to the fasteners to semi-rigid torsion mechanism node performance data.
Based on the test results, we established the semi-rigid analytical model of coupler connections is established and a simplified design equation is presented. And made a simplified formula of M-θfor engineering practice, then with the test results and other researchers have made a comparative study.
To further clear the node fasteners work of semi-rigid torsion of the template mechanism and the degree of influence the overall performance of stent. Then the large general-purpose finite element analysis software ANSYS11.0 was used to do detailed three-dimensional solid finite element models of coupler connections and the whole framework model template support in which considered material non-linearity and contact non-linearity to get the semi-rigid characteristics of coupler connections, i.e.moment-rotation curves of nodes. And in particular to the simulation results of node fastener test results were compared with the study.
Based on the above work,we proposed problems which need further study in this area.
在对近年历次重大脚手架和模板支撑架安全事故的诱因深入分析的基础上,明确了当前研究的主要不足在于忽略了扣件节点的半刚性受扭机制,以此确定了本文研究的内容,具体采用理论分析、试验与数值模拟相结合的研究方法。
为了验证直角扣件节点的抗扭转性能,本文对直角扣件进行了试验研究,试验以盖板螺栓紧固扭矩为主要研究参数,并考虑扣件制作工艺、材料质量等可能造成扣件性能离散的因素,完成了多层次、高试件量的试验工作,针对不同工况较地全面地获得了扣件节点半刚性受扭机制的性能数据。
在对试验结果详细分析和比较的基础上,根据试验数据的拟合结果,建立了用以解释扣件节点半刚性受扭机制的力学分析模型,并提出了适用于工程实践的简化的M-θ公式,并将其与试验结果及其他研究者已提出的分析模型进行了对比研究。
为进一步明确扣件节点的半刚性受扭工作机理及其对模板支架整体性能的影响程度,采用大型通用有限元程序ANSYS建立了考虑材料非线性和接触非线性的扣件节点三维实体精细化模型和扣件式钢管模板支架的整体模型,以此进行了仿真分析。并特别将扣件节点的仿真结果与试验结果进行了对比研究。
在上述工作的基础上,提出了该领域需进一步研究的问题。
Fastener-style tubular steel scaffold has widely used in building construction, beeause it has a number of advantages, including:simple detail, versatile, applicable to a wide range, high carrying capacity and relatively inexpensive. But the collapse accidents of scaffold structures are occurred frenquently in recent years, and caused serious casualties and economic loss. The major reasons are that deficiency of design philosophy and the comprehensive understanding of the mechanical behavior of eouPler-stylesteel tubular formwork supports has still not be built, which resulted in the improper configurations of those formwork supports failed before. At the same time, the shortage of construction management and stuff quality are still the factors of the collapse accidents. Therefore the investigation on coupler-style steel tubular formwork supports has important theoretic and practice value.
This dissertation enumerated a lot of the collapse accidents of scaffold structures in recent years, It was cleared that an important deficiency of current researches is the ignored the semi-rigid node torsion mechanism,which determined the contents of this paper. The specific use of theoretical analysis, experimental and numerical simulation methods of combining.
To verify the torsion properties of right-angle fastener, we are studied rectangular fastener in this paper, Cover bolt torque is the main parameters of the test, And consider the fastener manufacturing process, quality of materials, which may cause the performance of discrete fastener elements, to complete a multi-level, high-volume sample test work, and different conditions for a more comprehensive access to the fasteners to semi-rigid torsion mechanism node performance data.
Based on the test results, we established the semi-rigid analytical model of coupler connections is established and a simplified design equation is presented. And made a simplified formula of M-θfor engineering practice, then with the test results and other researchers have made a comparative study.
To further clear the node fasteners work of semi-rigid torsion of the template mechanism and the degree of influence the overall performance of stent. Then the large general-purpose finite element analysis software ANSYS11.0 was used to do detailed three-dimensional solid finite element models of coupler connections and the whole framework model template support in which considered material non-linearity and contact non-linearity to get the semi-rigid characteristics of coupler connections, i.e.moment-rotation curves of nodes. And in particular to the simulation results of node fastener test results were compared with the study.
Based on the above work,we proposed problems which need further study in this area.
引文
[1]建筑施工扣件式钢管脚手架安全技术规范(JGJ130—2001)[S].中国建筑工业出版社.
[2]谢建民,王建宏.模板支架倒塌事故分析与对策[J],施工技术,2004,33(2)
[3]靡嘉平.脚手架、模板倒塌事故的原因及对策[J],建筑技术,2000,32(4)
[4]胡凯山.扣件式钢管模板支撑架结构力学性能研究[D],浙江大学硕士学位论文,2007.
[5]益德清,扣件式钢管脚手架与模板支架的设计计算,浙江建筑,2003,(5)8-15.
[6]钢管脚手架扣件(GB15831-2006)[S].中国标准出版社
[7]曾凡奎胡长明,等.扣件式钢管模板支架稳定性试验研究[J],工业建筑,2010,40(2).
[8]杨俊杰,顾仲文,等.扣件式钢管模板高支撑体系实测分析[J],施工技术,2006.02,35(z)：8～14.
[9]姜旭,张其林.新型脚手架试验研究[J],工业建筑,2007,增刊
[10]黄宝魁,徐崇宝,张铁铮等,双排扣件式钢管脚手架整体稳定实验与理论分析,建筑技术,1991,18(9)：40-45.
[11]郭正兴,杨宗放,框式脚手架承载能力的试验研究,建筑技术,1991,(9)：44～48.
[12]李维滨,刘桐,郭正兴,扣件式钢管模板支架安全性研究与施工建议,建筑技术,35(8)：593～595.
[13]Wang Bu, Guo Xiang Li. Investigation on mechanical behavior of coupler-style steel tubular formwork supports. Ⅱ:Anlysis of high formwork support systems. [J] Technology of Architecture and Structure, Shanghai, September,2009,443-448.
[14]张永春.扣件式钢管模板支架动力特性及抗倒塌研究[D].长安大学硕士学位论文,2009.5
[15]那路,徐崇宝,高维成等(1994).门式钢管脚手架稳定极限承载力影响因素的研究[J].哈尔滨建筑大学学报.27(3),1994：76-53.
[16]高维成,辛欣((1999),门式钢管脚手架半刚性稳定分析[J]低温建筑技术,(1),1999：13-15.
[17]J.L.Peng, A.D.Pan, D.VRosowaky, etc (1996). High Clearanee Seaffold Systems during ConstrUction-I.Structural Modeling and Modes of Failure.[J].Engng Struct, (18)1996:247-257.
[18]J.L.Peng, A.D.Pan, D.V Rosowaky, etc (1996). High Clearanee Seaffold Systems during ConstrUetion-Ⅱ. Structural Analysis and DeveloPment of Design Guidelines, [J].Engng Struct, (18)1996: 258-267.
[19]YL.Huang, W.FChen, H.J.Chen, etc(2000). A monitoring method for scaffold-frame shoring Systems for elevated conerete form work. Computers & Struetures.(78)2000:682-690.
[20]杜荣军.脚手架结构的设计规定和计算方法[J].建筑技术,1999,30(8)：532-535.
[21]杜荣军.脚手架结构的稳定承载能力[J].施工技术,2001,30(4)：1-4.
[22]杜荣军.扣件式钢管模板高支撑架的设计和使用安全[J].施工技术,2002,31(3)：3-8.
[23]Wang Bu, Guo Xiang Li. Investigation on mechanical behavior of coupler-style steel tubular formwork supports. I:Analytical model of semi-rigid connections. [J] Technology of Architecture and Structure, Shanghai, September,2009,436-442.
[24]敖鸿斐.双排扣件式钢管脚手架整体极限承载力研究[D].同济大学硕士学位论文,2000.
[25]徐崇宝等.双排扣件式钢管脚手架工作性能的理论分析与试验研究[1].哈尔滨建筑工程学院学报,1989,22(2)：37—55
[26]郭向利.扣件式钢管模板支架受力性能研究[D].长安大学硕士学位论文,2009.5
[27]鲁征.扣件式脚手架及模板支架施工期安全性分析[D].浙江大学硕士学位论文,2005.2
[28]胡长明.扣件联结钢结构的试验及其理论研究[D].西安建筑科技大学博士学位论文,2008.5
[29]袁雪霞,金伟良,等.扣件式钢管支模架稳定承载能力研究[J],土木工程学报,2006,39(5)：43-50.
[30]胡长明,车佳玲,等.节点半刚性对扣件式钢管模板支架稳定承载力的影响分析[J],工业建筑,2010,40(2)：20-23.
[31]S.L.Chan, Z.H.Zhou, W.F.Chen etc., Stability Analysis of Semi-Rigid Steel Scaffolding, Engineering Structure,1995,17:568-574.
[32]J.L.Peng, A.D.E.Pan, S.L.Chan, Simplified Models for Analysis and Design of Modular Falsework, Journal of Constructional Steel Research,1998,48:189-209.
[33]胡凯山,扣件式钢管模板支撑架结构力学性能研究[D].浙江大学硕士学位论文,2007.
[34]Brand, R.E.Stability of tubular scaffolding[J]. Civil Engineering and Public Works Review,1972, 67(791).
[35]HomesM., Hindson D. Structural behaviour of load bearing false work[J].Proeeedings of the Institution of Civil Engineers(London).Partl-Design& Construction,1979,67(2).
[36]Godley M.H.R.and Beale R.G., Sway Stiffness of Scaffold Structures, Structural Engineer,1997, 75(1):4-12.
[37]Godley M.H.R.and Beale R.G., Analysis of Large Proprietary AccessScaffold Structure, Structures and Buildings,2001,146(1):31-39.
[38]Design of Steel Structures[S], CEN:prEN1993-1-8. Euroeode 3:Part 1.8 Design of joints.2005.
[39]Aggarwal AK, Coates R C. Moment-Rotation Characteristics of Bolted Beam-Column Connections[J], Journal of Constructional Steel Research,1986.06:303-318
[40]Load and Resistance Faetor Design Specifieation for Structural Steel Buildings[S], American Institute of Steel Construction, Chicago, IL,1999.
[41]陈惠发著,周绥平译.钢框架稳定设计[M],上海：世界图书出版社,1999.
[42]Lee Sang-Sup, MoonTae-SuP. Moment-rotationmodel of semigidel of conenctions with angles[J], Engineering Structures 2002,24:227-237.
[43]张朝晖ANSYS 11.0结构分析工程应用实例解析(第2版)[M].北京：机械工业出版社,2008.
[44]ANSYS非线性分析指南[M].美国ANSYS公司北京办事处.
[45]王新敏.ANSYS工程结构数值分析[M].北京：人民交通出版社,2007.
[46]博弈创作室.ANSYS9.0经典产品基础教程及实例解析[M].北京：中国水利水电出版社,2005.
[47]蒋友琼.非线性有限元法[M].北京：清华大学出版社,2002.
[48]邓凡平ANSYS10.0有限元分析自学手册[M].北京：人民邮电出版社,2007.
[49]刘涛,杨凤鹏.精通ANSYS[M].北京：清华大学出版社,2002.
[50]蒋友琼.非线性有限元法[M].北京：清华大学出版社,2002.
[51]ANSYS基本过程手册[M].美国ANSYS公司北京办事处
[52]ANSYS建模与分网指南[M].美国ANsYS公司北京办事处
[53]商跃进.有限元原理与ANSYS应用指南[M].北京：清华大学出版社,2005.06
[54]赖永标,胡仁善.ANSYS11.0土木工程有限元分析典型范例[M].北京：电子工业出版社
[55]ANSYS单元手册摘要[M].美国ANSYS公司北京办事处
[56]APDL使用指南[M].美国ANSYS公司北京办事处
[57]ANSYS高级技术分析指南[M].美国ANSYS公司北京办事处
[58]ANSYS非线性分析指南[M].美国ANSYS公司北京办事处
[59]碳素结构钢(GB-T700-2006)[S].中国标准出版社
[60]低压流体输送用焊接钢管(GB-3092-1993)[S].中国标准出版社
[61]普通螺纹基本尺寸(GB-T196-2003)[S].中国标准出版社
[62]半圆头铆钉(GB867-86)[S].中国标准出版社
[63]博弈创作室.ANSYS9.0经典产品基础教程及实例解析[M].北京：中国水利水电出版社,2005.
[64]钢管扣件水平模板的支撑系统安全技术规程[S].DG/TJ08-016-2004.上海
[2]谢建民,王建宏.模板支架倒塌事故分析与对策[J],施工技术,2004,33(2)
[3]靡嘉平.脚手架、模板倒塌事故的原因及对策[J],建筑技术,2000,32(4)
[4]胡凯山.扣件式钢管模板支撑架结构力学性能研究[D],浙江大学硕士学位论文,2007.
[5]益德清,扣件式钢管脚手架与模板支架的设计计算,浙江建筑,2003,(5)8-15.
[6]钢管脚手架扣件(GB15831-2006)[S].中国标准出版社
[7]曾凡奎胡长明,等.扣件式钢管模板支架稳定性试验研究[J],工业建筑,2010,40(2).
[8]杨俊杰,顾仲文,等.扣件式钢管模板高支撑体系实测分析[J],施工技术,2006.02,35(z)：8～14.
[9]姜旭,张其林.新型脚手架试验研究[J],工业建筑,2007,增刊
[10]黄宝魁,徐崇宝,张铁铮等,双排扣件式钢管脚手架整体稳定实验与理论分析,建筑技术,1991,18(9)：40-45.
[11]郭正兴,杨宗放,框式脚手架承载能力的试验研究,建筑技术,1991,(9)：44～48.
[12]李维滨,刘桐,郭正兴,扣件式钢管模板支架安全性研究与施工建议,建筑技术,35(8)：593～595.
[13]Wang Bu, Guo Xiang Li. Investigation on mechanical behavior of coupler-style steel tubular formwork supports. Ⅱ:Anlysis of high formwork support systems. [J] Technology of Architecture and Structure, Shanghai, September,2009,443-448.
[14]张永春.扣件式钢管模板支架动力特性及抗倒塌研究[D].长安大学硕士学位论文,2009.5
[15]那路,徐崇宝,高维成等(1994).门式钢管脚手架稳定极限承载力影响因素的研究[J].哈尔滨建筑大学学报.27(3),1994：76-53.
[16]高维成,辛欣((1999),门式钢管脚手架半刚性稳定分析[J]低温建筑技术,(1),1999：13-15.
[17]J.L.Peng, A.D.Pan, D.VRosowaky, etc (1996). High Clearanee Seaffold Systems during ConstrUction-I.Structural Modeling and Modes of Failure.[J].Engng Struct, (18)1996:247-257.
[18]J.L.Peng, A.D.Pan, D.V Rosowaky, etc (1996). High Clearanee Seaffold Systems during ConstrUetion-Ⅱ. Structural Analysis and DeveloPment of Design Guidelines, [J].Engng Struct, (18)1996: 258-267.
[19]YL.Huang, W.FChen, H.J.Chen, etc(2000). A monitoring method for scaffold-frame shoring Systems for elevated conerete form work. Computers & Struetures.(78)2000:682-690.
[20]杜荣军.脚手架结构的设计规定和计算方法[J].建筑技术,1999,30(8)：532-535.
[21]杜荣军.脚手架结构的稳定承载能力[J].施工技术,2001,30(4)：1-4.
[22]杜荣军.扣件式钢管模板高支撑架的设计和使用安全[J].施工技术,2002,31(3)：3-8.
[23]Wang Bu, Guo Xiang Li. Investigation on mechanical behavior of coupler-style steel tubular formwork supports. I:Analytical model of semi-rigid connections. [J] Technology of Architecture and Structure, Shanghai, September,2009,436-442.
[24]敖鸿斐.双排扣件式钢管脚手架整体极限承载力研究[D].同济大学硕士学位论文,2000.
[25]徐崇宝等.双排扣件式钢管脚手架工作性能的理论分析与试验研究[1].哈尔滨建筑工程学院学报,1989,22(2)：37—55
[26]郭向利.扣件式钢管模板支架受力性能研究[D].长安大学硕士学位论文,2009.5
[27]鲁征.扣件式脚手架及模板支架施工期安全性分析[D].浙江大学硕士学位论文,2005.2
[28]胡长明.扣件联结钢结构的试验及其理论研究[D].西安建筑科技大学博士学位论文,2008.5
[29]袁雪霞,金伟良,等.扣件式钢管支模架稳定承载能力研究[J],土木工程学报,2006,39(5)：43-50.
[30]胡长明,车佳玲,等.节点半刚性对扣件式钢管模板支架稳定承载力的影响分析[J],工业建筑,2010,40(2)：20-23.
[31]S.L.Chan, Z.H.Zhou, W.F.Chen etc., Stability Analysis of Semi-Rigid Steel Scaffolding, Engineering Structure,1995,17:568-574.
[32]J.L.Peng, A.D.E.Pan, S.L.Chan, Simplified Models for Analysis and Design of Modular Falsework, Journal of Constructional Steel Research,1998,48:189-209.
[33]胡凯山,扣件式钢管模板支撑架结构力学性能研究[D].浙江大学硕士学位论文,2007.
[34]Brand, R.E.Stability of tubular scaffolding[J]. Civil Engineering and Public Works Review,1972, 67(791).
[35]HomesM., Hindson D. Structural behaviour of load bearing false work[J].Proeeedings of the Institution of Civil Engineers(London).Partl-Design& Construction,1979,67(2).
[36]Godley M.H.R.and Beale R.G., Sway Stiffness of Scaffold Structures, Structural Engineer,1997, 75(1):4-12.
[37]Godley M.H.R.and Beale R.G., Analysis of Large Proprietary AccessScaffold Structure, Structures and Buildings,2001,146(1):31-39.
[38]Design of Steel Structures[S], CEN:prEN1993-1-8. Euroeode 3:Part 1.8 Design of joints.2005.
[39]Aggarwal AK, Coates R C. Moment-Rotation Characteristics of Bolted Beam-Column Connections[J], Journal of Constructional Steel Research,1986.06:303-318
[40]Load and Resistance Faetor Design Specifieation for Structural Steel Buildings[S], American Institute of Steel Construction, Chicago, IL,1999.
[41]陈惠发著,周绥平译.钢框架稳定设计[M],上海：世界图书出版社,1999.
[42]Lee Sang-Sup, MoonTae-SuP. Moment-rotationmodel of semigidel of conenctions with angles[J], Engineering Structures 2002,24:227-237.
[43]张朝晖ANSYS 11.0结构分析工程应用实例解析(第2版)[M].北京：机械工业出版社,2008.
[44]ANSYS非线性分析指南[M].美国ANSYS公司北京办事处.
[45]王新敏.ANSYS工程结构数值分析[M].北京：人民交通出版社,2007.
[46]博弈创作室.ANSYS9.0经典产品基础教程及实例解析[M].北京：中国水利水电出版社,2005.
[47]蒋友琼.非线性有限元法[M].北京：清华大学出版社,2002.
[48]邓凡平ANSYS10.0有限元分析自学手册[M].北京：人民邮电出版社,2007.
[49]刘涛,杨凤鹏.精通ANSYS[M].北京：清华大学出版社,2002.
[50]蒋友琼.非线性有限元法[M].北京：清华大学出版社,2002.
[51]ANSYS基本过程手册[M].美国ANSYS公司北京办事处
[52]ANSYS建模与分网指南[M].美国ANsYS公司北京办事处
[53]商跃进.有限元原理与ANSYS应用指南[M].北京：清华大学出版社,2005.06
[54]赖永标,胡仁善.ANSYS11.0土木工程有限元分析典型范例[M].北京：电子工业出版社
[55]ANSYS单元手册摘要[M].美国ANSYS公司北京办事处
[56]APDL使用指南[M].美国ANSYS公司北京办事处
[57]ANSYS高级技术分析指南[M].美国ANSYS公司北京办事处
[58]ANSYS非线性分析指南[M].美国ANSYS公司北京办事处
[59]碳素结构钢(GB-T700-2006)[S].中国标准出版社
[60]低压流体输送用焊接钢管(GB-3092-1993)[S].中国标准出版社
[61]普通螺纹基本尺寸(GB-T196-2003)[S].中国标准出版社
[62]半圆头铆钉(GB867-86)[S].中国标准出版社
[63]博弈创作室.ANSYS9.0经典产品基础教程及实例解析[M].北京：中国水利水电出版社,2005.
[64]钢管扣件水平模板的支撑系统安全技术规程[S].DG/TJ08-016-2004.上海