冷弯薄壁型钢结构住宅体系组合墙体竖向受力分析
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摘要
与国外的先进水平相比,我国对轻钢住宅结构体系的研究和应用起步较晚,对冷弯薄壁型钢结构住宅体系仍处于研究和试点阶段。鉴于冷弯薄壁钢构件宽厚比比较大,在压力作用下,此类钢构件易发生局部失稳或结构失稳,失稳一旦发生,结构随即丧失承载力,将直接危害到结构的安全。本文通过对冷弯薄壁钢结构住宅体系组合墙体C型墙柱进行竖向受力的深入研究分析,以期能为此类钢结构住宅体系在国内的发展起到积极的推进作用。
1.本文首先介绍了冷弯薄壁型钢结构住宅的特点、目前国内外应用情况及国内外冷弯薄壁型钢结构住宅竖向受力结构体系的研究现状。
2.详细介绍了冷弯薄壁型钢结构住宅体系竖向受力体系,阐述了冷弯薄壁型钢结构板件受压作用下板件屈曲理论和有效宽度的概念,并运用现有的计算理论,考虑板组效应对矩形薄壁构件整个截面承载力的影响。
3.本文从单根墙柱出发,讨论了冷弯薄壁型钢结构住宅体系中单根墙柱在竖向荷载作用下,不同的屈曲模式和对应的屈曲荷载；并计算分析了柱计算长度、截面尺寸与临界计算长度、屈曲模式和屈曲应力的关系。
4.考虑墙板作用的墙柱在竖向轴心荷载作用下,分析了截面腹板高度、截面厚度不同下的承载力变化规律及破坏模式,并对比分析了有墙板与无墙板条件下柱子的极限承载力,得出相关结论。
5.建立了无墙板墙体和墙板支撑墙体的有限元ANSYS分析模型,参考相关试验文献,确定合适的模型边界约束条件,通过有限元分析讨论了顶梁、底梁对墙柱计算长度的影响,进一步分析了不同墙板支撑类型,不同墙柱间距等条件下组合墙体竖向极限承载力的变化规律。
最后,在上述研究的基础上,总结全文所得出的主要结论,并结合当前国际和国内的研究方向,提出本文有待进一步完善的工作。
Comparing with the overseas advanced level, our country is later in the research and appli-cation about light steel structure, and is still in the research and the experiment site stage about the cold-formed thin-walled steel residential buildings.For the ratio width-thickness of cold--formed thin-walled steel is bigger, element is easy to happen local buckling or overall buckling, when the structure bears the vertical load. Once stability loses, the thin-walled steel structure collapses immediately, the structure security is harmed directly.Through the research on the composite wall C-shaped stud of the cold-formed thin-walled steel residential buildings under bearing vertical load, we hoped that the thesis can accelerate the development of the steel residential buildings in the domestic.
1. introduce specifically the characteristics of the cold-formed thin-walled steel residential buildings, the domestic and international application of the steel residential buildings at present, and the domestic and international research status of the cold-steel thin-walled steel residential buildings system under the vertical force.
2. Introduce specifically the cold-formed thin-walled steel residential buildings vertical stress system, the cold-formed thin-walled steel plate buckling theory and effective width under bearing vertical load, and, effect of bearing capacity taking into account plate assembly effect of rectangular thin-walled member using the existing theory.
3. From the simple root stud, this thesis discusses the different buckling load and buckling failure mode of the simple root stud in the cold-formed thin-walled steel residential buildings under the vertical force; After, writer has analyzed the changes rule of the stud buckling stress, buckling failure mode under different studs calculated length, the section size, and the critical calculated length,some relationships are gained.
4. Analyzed the rule of critical buckling stress and failure mode under different section, when the sheathing-bracing wall stud bears the vertical load, acquire the laws that are relevant to the sheathing effect by contrasting and calculating the capacity of studs between sheathing--bracing and non-sheathing-bracing.
5.With the use of finite element analysis, set up a finite element ANS YS model about the composite wall of sheathing-bracing and non-sheathing-bracing; determine the appropriate model boundary constraint condition refer to the correlation testing literature; discuss effect of stud calculated length taking into account track; analyzed the change rule of the composite wall's critical buckling stress under different wall type, stud spacing.
Finally, on the basis of the above research, sum up the main conclusions and propose the further improved work in this thesis according to the domestic and international research direction.
1.本文首先介绍了冷弯薄壁型钢结构住宅的特点、目前国内外应用情况及国内外冷弯薄壁型钢结构住宅竖向受力结构体系的研究现状。
2.详细介绍了冷弯薄壁型钢结构住宅体系竖向受力体系,阐述了冷弯薄壁型钢结构板件受压作用下板件屈曲理论和有效宽度的概念,并运用现有的计算理论,考虑板组效应对矩形薄壁构件整个截面承载力的影响。
3.本文从单根墙柱出发,讨论了冷弯薄壁型钢结构住宅体系中单根墙柱在竖向荷载作用下,不同的屈曲模式和对应的屈曲荷载；并计算分析了柱计算长度、截面尺寸与临界计算长度、屈曲模式和屈曲应力的关系。
4.考虑墙板作用的墙柱在竖向轴心荷载作用下,分析了截面腹板高度、截面厚度不同下的承载力变化规律及破坏模式,并对比分析了有墙板与无墙板条件下柱子的极限承载力,得出相关结论。
5.建立了无墙板墙体和墙板支撑墙体的有限元ANSYS分析模型,参考相关试验文献,确定合适的模型边界约束条件,通过有限元分析讨论了顶梁、底梁对墙柱计算长度的影响,进一步分析了不同墙板支撑类型,不同墙柱间距等条件下组合墙体竖向极限承载力的变化规律。
最后,在上述研究的基础上,总结全文所得出的主要结论,并结合当前国际和国内的研究方向,提出本文有待进一步完善的工作。
Comparing with the overseas advanced level, our country is later in the research and appli-cation about light steel structure, and is still in the research and the experiment site stage about the cold-formed thin-walled steel residential buildings.For the ratio width-thickness of cold--formed thin-walled steel is bigger, element is easy to happen local buckling or overall buckling, when the structure bears the vertical load. Once stability loses, the thin-walled steel structure collapses immediately, the structure security is harmed directly.Through the research on the composite wall C-shaped stud of the cold-formed thin-walled steel residential buildings under bearing vertical load, we hoped that the thesis can accelerate the development of the steel residential buildings in the domestic.
1. introduce specifically the characteristics of the cold-formed thin-walled steel residential buildings, the domestic and international application of the steel residential buildings at present, and the domestic and international research status of the cold-steel thin-walled steel residential buildings system under the vertical force.
2. Introduce specifically the cold-formed thin-walled steel residential buildings vertical stress system, the cold-formed thin-walled steel plate buckling theory and effective width under bearing vertical load, and, effect of bearing capacity taking into account plate assembly effect of rectangular thin-walled member using the existing theory.
3. From the simple root stud, this thesis discusses the different buckling load and buckling failure mode of the simple root stud in the cold-formed thin-walled steel residential buildings under the vertical force; After, writer has analyzed the changes rule of the stud buckling stress, buckling failure mode under different studs calculated length, the section size, and the critical calculated length,some relationships are gained.
4. Analyzed the rule of critical buckling stress and failure mode under different section, when the sheathing-bracing wall stud bears the vertical load, acquire the laws that are relevant to the sheathing effect by contrasting and calculating the capacity of studs between sheathing--bracing and non-sheathing-bracing.
5.With the use of finite element analysis, set up a finite element ANS YS model about the composite wall of sheathing-bracing and non-sheathing-bracing; determine the appropriate model boundary constraint condition refer to the correlation testing literature; discuss effect of stud calculated length taking into account track; analyzed the change rule of the composite wall's critical buckling stress under different wall type, stud spacing.
Finally, on the basis of the above research, sum up the main conclusions and propose the further improved work in this thesis according to the domestic and international research direction.
引文
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[2]谌红荣.冷弯薄壁C型钢压杆整体稳定临界力的研究.[硕士学位论文].重庆：重庆大学
[3]薛发.国外钢结构住宅发展概况.2003年中国(上海)钢结构住宅产业与住宅科技博览会,2003
[4]国家建筑钢结构产业“十五”计划和2010年发展规划纲要[R].住宅产业,2000(9)
[5]丁成章.发展冷弯轻钢骨架住宅需要克服的困难和解决的问题.钢结构,2003年第18卷第2期
[6]GB50016-2006建筑设计防火规范[S]
[7]GB50018-2002冷弯薄壁型钢结构技术规范[S]
[8]周绪红,石宇,周天华等.低层冷弯薄壁型钢结构住宅体系.建筑科学与工程学报,2005,第22卷第2期.1-2
[9]居荣初,陈音飞,邵雄飞.轻钢结构特点及其发展趋势.中国建筑金属结构,2002,第9期.15
[10]俞铭华,潘海涛,吴剑国等.多层轻钢住宅结构体系分析.华东船舶工业学院学报(自然科学版),2002,第16卷第3期：16-17
[11]梁爱华,G. J. VAN DEN BERG.国外冷弯薄壁型钢设计有效宽度理论介绍.安徽建筑,1999,2
[12]杨旭东.薄板屈曲后强度利用的探讨.绍兴文理学院学报,2001,21(4)
[13]陈剑,顾强,陈绍蕃.薄壁卷边槽钢梁板件相关屈曲分析及受压翼缘的有效宽厚比.西安建筑科技大学学报,1996,28(4)
[14]Lee, Y K. Behavior of Gypsum-Sheathed Cold-Formed Steel Wall Stud Panels[R]. Oregon State University,1999,327 pages.
[15]Lee, Y K. and Thomas H. Miller. Axial Strength Determination for Gypsum-Sheathed, Cold-Formed Steel Wall Stud Composite Panels[J]. Journal of Structural Engineering, Vol.127, No.6,June,2001; 1644-1650.
[16]于炜文,冷成型钢结构设计,董军,夏冰青译.北京：中国水利水电出版社, 2003
[17]Simaan,A., and T.Pekoz. Diaphragm Braced Members and Design of Wall Studs[J]. Journal of the Structural Division, ASCE Proceeding,Vol. 102, Jan.1976
[18]Miller,T.H., and T.Pekoz. Behavior of Gypsum-Sheathed Cold-Formed Steel Wall Studs[J]. Journal of Structural Engineering, Vol. 120,No.5,May,1994:1644-1650.
[19]AISI.North American Specification for the Design of Cold-Formed Steel Structura Members. American Iron and Steel Institute,2001
[20]Yaip Telue, Mahen Mahendran, Numerical modeling and design of unlined cold-formed steel wall frames. Journal of constructional steel research,60(2004),1215-1256
[21]Yaip Telue, Mahen Mahendran, Behavior of cold-formed steel wall frames lined with plasterboard. Journal of constructional steel research, 57(2001),435-452
[22]钟亚军.冷弯型钢低层住宅房屋体系墙体墙柱的性能研究[D].[硕士毕业论文].西安：西安建筑科技大学,2002
[23]钟善桐.钢结构.北京：中国建筑工业出版社,1998
[24]张中权,陈雪庭,徐厚军.《冷弯薄壁型钢结构技术规范》(GB 50018-2002)修订内容简介.钢结构,2002,17(5)
[25]朱慈勉,沈祖炎.薄壁柱相关屈曲分析的混和有限元模形.同济大学学报,1997,25(1)
[26]杨旭东.薄板屈曲后强度利用的探讨.绍兴文理学院学报,2001,21(4)
[27]陈剑,顾强,陈绍蕃.薄壁卷边槽钢梁板件相关屈曲分析及受压翼缘的有效宽厚比.西安建筑科技大学学报,1996,28(4)
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