波纹腹板H型钢轴心受压构件整体稳定性能分析
发布时间：2018-11-01 18:31
【摘要】：波纹腹板H型钢构件是由波浪形式的钢腹板与平翼缘通过高频连续焊焊接而成的轻钢型构件。对于轴心受压构件而言,虽然由于腹板的褶皱作用,构件在沿波折方向几乎不能承受轴向压力,但在另一个轴线方向的抗弯刚度却有了较大的提升。目前国内对波纹腹板H型钢的轴心受压构件研究较少,这在很大程度上限制了波纹腹板H型钢的发展。本文通过采用理论分析和有限元数值模拟,对波纹腹板H型钢的轴心受压构件的整体稳定性进行了研究,参考了现行规范中的一些近似的处理方法和常用做法,对波纹腹板H型钢柱的轴心受压整体稳定性提出了意见与建议。首先针对波纹腹板H型钢的轴心受压构件,结合已有的理论和近似研究方法,提出了一种适用于推导波纹腹板H型钢的换算长细比公式的简化力学模型。利用上述模型,对波纹腹板H型钢的换算长细比公式进行了分析。利用波纹腹板H型钢柱与格构柱在力学性能上的相似性,提出了适用于波纹腹板H型钢的换算长细比公式。采用一种适合用于有限元计算的柱简化模型,通过变化长细比验证了本文推导公式的适用性。其次,通过有限元分析软件对波纹腹板H型钢的波纹形式、长细比、翼缘宽厚比、腹板高厚比以及波幅与波长比对构件弯曲临界屈曲荷载的影响情况进行了分析。在考虑材料非线性和几何非线性的双重非线性的条件下,通过在输出文件中写入缺陷值,分析了整体初弯曲值对波纹腹板H型钢的轴心受压的极限荷载的影响情况。本文的主要研究成果如下:(1)建立了适用于研究波纹腹板H型钢轴心受压构件的简化模型;(2)推导并验证了适用于波纹腹板H型钢的换算长细比公式,使得当构件应用于工程实际后更加稳定安全;(3)波纹腹板H型钢轴心受压构件的承载力随着长细比的增大而减小;(4)波纹腹板H型钢轴心受压构件的四种波纹形状对构件的承载力影响较小,因此作为轴心受压构件的时候,不同的波纹形式可以互相等效替换;(5)波纹腹板H型钢轴心受压构件的翼缘宽厚比的建议取值范围为10～30;(6)波纹腹板H型钢轴心受压构件的腹板高厚比的限值为425;(7)波纹腹板H型钢轴心受压构件的波幅与波长比对构件的承载力影响可以忽略不计;(8)在考虑非线性作用下的波纹腹板H型钢轴心受压构件的整体初弯曲值对波纹腹板H型钢柱构件极限承载力有一定的影响,但初弯曲值在长细比较小的构件中的影响较大。(9)在实腹式H型钢的几何参数选择范围内,对波纹腹板H型钢的极限承载力与实腹式H型钢的极限承载力进行对比分析,发现它们的降低系数的关系近乎呈现线性关系,通过线性拟合,得到了波纹腹板H型钢柱与实腹式柱的折减系数。本文的相关结论,补充了波纹腹板H型钢结构的设计计算理论,为《波纹腹板钢结构应用技术规程》(CEC5290-2011)的进一步修订完善提供了参考。
[Abstract]:Corrugated web H-shaped steel member is a light steel member which is welded by high frequency continuous welding between wavy steel web and flat flange. For axially compressed members, the flexural stiffness in the other axis has been greatly improved, although the axial pressure can hardly be withstood along the corrugated direction due to the web fold. At present, there are few researches on the axial compression members of corrugated web H-section in China, which limits the development of corrugated web H-section to a great extent. By means of theoretical analysis and finite element numerical simulation, this paper studies the overall stability of axial compression members of corrugated webs H-section steel, and refers to some approximate treatment methods and common methods in current codes. Comments and suggestions on the overall stability of corrugated webs H-shaped columns under axial compression are presented. In this paper, a simplified mechanical model is proposed to deduce the formula of the aspect ratio of corrugated web H-shaped steel, which is based on the existing theory and approximate research method, aiming at the axial compression member of corrugated web H-section steel. Based on the above model, the formula of conversion aspect ratio of corrugated web H-section steel is analyzed. Based on the similarity of mechanical properties between corrugated webs H-shaped steel columns and lattice columns, the conversion ratio formula for corrugated webs H-shaped steel is proposed. A simplified column model suitable for finite element calculation is adopted and the applicability of the derived formula is verified by changing the aspect ratio. Secondly, the influence of corrugated form, aspect ratio, flange width to thickness ratio, web height to thickness ratio and the ratio of wave amplitude to wavelength on the bending critical buckling load of corrugated web H-section steel is analyzed by finite element analysis software. Considering the double nonlinearity of material nonlinearity and geometric nonlinearity, the influence of global initial bending value on the axial ultimate load of corrugated web H-section steel is analyzed by writing the defect value in the output file. The main research results of this paper are as follows: (1) A simplified model is established for the study of corrugated webs H-section steel axial compression member; (2) deduces and verifies the conversion slenderness ratio formula suitable for corrugated web H-section steel, which makes the component more stable and safe when it is applied in engineering practice; (3) the bearing capacity of corrugated webs H-shaped steel axial compression members decreases with the increase of slenderness ratio; (4) the four shapes of corrugated webs H-shaped steel axial compression members have little influence on the bearing capacity of the members, so different corrugated forms can be replaced each other as axial compression members. (5) the suggested ratio of flange width to thickness of corrugated webs H-shaped steel axial compression members is 10 / 30, (6) the limiting value of web height to thickness ratio of corrugated H-shaped steel axial compression members is 425; (7) the influence of wave amplitude to wavelength ratio on the bearing capacity of H-section steel axial compression members with corrugated webs can be neglected. (8) the initial bending value of the corrugated web H-shaped steel axial compression member has certain influence on the ultimate bearing capacity of corrugated web H-shaped steel column member. But the initial bending value has a great influence on the members with small length and fineness. (9) in the range of geometric parameters selection, the ultimate bearing capacity of corrugated web H-section steel and the ultimate bearing capacity of full-web H-section steel are compared and analyzed. It is found that the relationship between the decreasing coefficients of the corrugated webs and the solid web columns is almost linear. By linear fitting, the reduction coefficients of corrugated webs H-shaped columns and solid web columns are obtained. The conclusion of this paper complements the design and calculation theory of corrugated webs H-section steel structure, and provides a reference for the further revision and perfection of CEC5290-2011 (Technical Specification for the Application of corrugated Web Steel structures).
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU392.1
本文编号：2304743
[Abstract]:Corrugated web H-shaped steel member is a light steel member which is welded by high frequency continuous welding between wavy steel web and flat flange. For axially compressed members, the flexural stiffness in the other axis has been greatly improved, although the axial pressure can hardly be withstood along the corrugated direction due to the web fold. At present, there are few researches on the axial compression members of corrugated web H-section in China, which limits the development of corrugated web H-section to a great extent. By means of theoretical analysis and finite element numerical simulation, this paper studies the overall stability of axial compression members of corrugated webs H-section steel, and refers to some approximate treatment methods and common methods in current codes. Comments and suggestions on the overall stability of corrugated webs H-shaped columns under axial compression are presented. In this paper, a simplified mechanical model is proposed to deduce the formula of the aspect ratio of corrugated web H-shaped steel, which is based on the existing theory and approximate research method, aiming at the axial compression member of corrugated web H-section steel. Based on the above model, the formula of conversion aspect ratio of corrugated web H-section steel is analyzed. Based on the similarity of mechanical properties between corrugated webs H-shaped steel columns and lattice columns, the conversion ratio formula for corrugated webs H-shaped steel is proposed. A simplified column model suitable for finite element calculation is adopted and the applicability of the derived formula is verified by changing the aspect ratio. Secondly, the influence of corrugated form, aspect ratio, flange width to thickness ratio, web height to thickness ratio and the ratio of wave amplitude to wavelength on the bending critical buckling load of corrugated web H-section steel is analyzed by finite element analysis software. Considering the double nonlinearity of material nonlinearity and geometric nonlinearity, the influence of global initial bending value on the axial ultimate load of corrugated web H-section steel is analyzed by writing the defect value in the output file. The main research results of this paper are as follows: (1) A simplified model is established for the study of corrugated webs H-section steel axial compression member; (2) deduces and verifies the conversion slenderness ratio formula suitable for corrugated web H-section steel, which makes the component more stable and safe when it is applied in engineering practice; (3) the bearing capacity of corrugated webs H-shaped steel axial compression members decreases with the increase of slenderness ratio; (4) the four shapes of corrugated webs H-shaped steel axial compression members have little influence on the bearing capacity of the members, so different corrugated forms can be replaced each other as axial compression members. (5) the suggested ratio of flange width to thickness of corrugated webs H-shaped steel axial compression members is 10 / 30, (6) the limiting value of web height to thickness ratio of corrugated H-shaped steel axial compression members is 425; (7) the influence of wave amplitude to wavelength ratio on the bearing capacity of H-section steel axial compression members with corrugated webs can be neglected. (8) the initial bending value of the corrugated web H-shaped steel axial compression member has certain influence on the ultimate bearing capacity of corrugated web H-shaped steel column member. But the initial bending value has a great influence on the members with small length and fineness. (9) in the range of geometric parameters selection, the ultimate bearing capacity of corrugated web H-section steel and the ultimate bearing capacity of full-web H-section steel are compared and analyzed. It is found that the relationship between the decreasing coefficients of the corrugated webs and the solid web columns is almost linear. By linear fitting, the reduction coefficients of corrugated webs H-shaped columns and solid web columns are obtained. The conclusion of this paper complements the design and calculation theory of corrugated webs H-section steel structure, and provides a reference for the further revision and perfection of CEC5290-2011 (Technical Specification for the Application of corrugated Web Steel structures).
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU392.1
【参考文献】
相关期刊论文 前10条
1 施刚;姜雪;周文静;张勇;;高强焊接圆钢管轴心受压整体稳定性能设计方法研究[J];建筑结构;2015年21期
2 柴昶;;关于波纹腹板H型钢在工程中合理应用问题的讨论[J];钢结构;2014年06期
3 郭彦林;刘锋;兰涛;姜子钦;陈航;;波浪腹板构件的设计原理与工程应用[J];施工技术;2012年14期
4 郭彦林;刘锋;窦超;姜子钦;;偏心受压波浪腹板阶形柱稳定性与侧移计算[J];工业建筑;2012年07期
5 张博浩;郭彦林;邓静芝;张庆林;;波浪腹板轴心受压构件设计方法及试验研究[J];工业建筑;2012年07期
6 王彦博;李国强;陈素文;孙飞飞;;Q460高强钢焊接箱形柱轴心受压力学性能数值分析[J];工业建筑;2012年01期
7 班慧勇;施刚;石永久;王元清;;高强度钢材轴心受压钢柱整体稳定性能的缺陷影响研究[J];工业建筑;2012年01期
8 李国强;王彦博;陈素文;孙飞飞;;Q460高强钢焊接箱形柱轴心受压极限承载力参数分析[J];建筑结构学报;2011年11期
9 乔民;;钢结构稳定问题的探索与分析[J];科技致富向导;2011年29期
10 郭彦林;王小安;张庆林;姜子钦;;波浪腹板门式刚架轻型房屋钢结构设计理论及应用[J];建筑结构;2011年04期
相关会议论文 前1条
1 贾小山;;波浪腹板钢结构制作技术及设计应用[A];钢结构与金属屋面新技术应用[C];2015年
相关博士学位论文 前2条
1 班慧勇;高强度钢材轴心受压构件整体稳定性能与设计方法研究[D];清华大学;2012年
2 张志平;广义切线模量理论及其应用[D];哈尔滨工程大学;2005年
相关硕士学位论文 前10条
1 申晋益;焊接实腹式工字钢梁腹板斜向加劲肋的设计及性能研究[D];西南石油大学;2016年
2 秦明光;钢管混凝土格构柱力学性能研究[D];中南大学;2014年
3 孟丽丽;波纹腹板H型钢吊车梁受力性能研究[D];河北工程大学;2013年
4 杨洋洋;梯形波纹腹板H型钢梁的力学性能研究[D];西安建筑科技大学;2013年
5 邓静芝;波浪腹板结构变形计算及疲劳性能研究[D];清华大学;2012年
6 董海涛;波纹腹板梁在起重机中的应用研究[D];武汉科技大学;2012年
7 王传慧;受火侵袭波纹腹板钢梁的侧向弯扭屈曲及其参数分析[D];山东建筑大学;2011年
8 辛佩龙;冷弯薄壁空心类椭圆截面钢构件数值模拟及设计方法研究[D];哈尔滨工业大学;2010年
9 常建华;波纹腹板钢梁承载力研究[D];河南工业大学;2010年
10 魏丽婷;椭圆截面柱壳的稳定性分析[D];兰州理工大学;2010年
，本文编号：2304743
本文链接：https://www.wllwen.com/jianzhugongchenglunwen/2304743.html
