冷弯薄壁卷边槽钢受压柱畸变屈曲性能的研究

发布时间：2018-05-26 07:42

本文选题：冷弯薄壁型钢 + 畸变屈曲　；参考：《武汉理工大学》2013年硕士论文

【摘要】：近些年来,钢材的强度随着技术的进步而不断提高,冷弯薄壁型钢构件截面形式也变得越来越复杂、越来越薄,畸变屈曲在一定截面形状和尺寸下会控制构件的承载力。国内对畸变屈曲的研究远未成熟,我国规范(GB50018-2002)还无针对畸变屈曲的相关设计规定。本文在现有的畸变屈曲理论和试验结果的基础上,通过有限元软件ANSYS和有限条程序CUFSM,对冷弯薄壁卷边槽钢轴压构件的畸变屈曲性能及稳定承载力进行了数值分析,主要内容包括： (1)总结了冷弯薄壁型钢构件的基本特点、发展历史以及应用前景,介绍了冷弯薄壁型钢轴压构件畸变屈曲国内外研究概况。对冷弯薄壁型钢轴压构件弹性畸变屈曲临界应力进行了有限元、有限条分析,验证了有限元、有限条法的可行性及实用性。 (2)利用有限元软件ANSYS对影响冷弯薄壁型钢轴压构件畸变屈曲承载力的几个因素,譬如卷边高度、板件厚度、腹板高度等进行了比较分析,得出了一些结论。 (3)利用有限条软件CUFSM分析了蒙皮支撑对于冷弯薄壁型钢轴压构件畸变屈曲性能屈曲的影响。 (4)比较分析了中国GB50018—2002《冷弯薄壁型钢构件技术规范》；北美AISI/NAS2007《冷成型钢结构设计规范》；澳大利亚AS/NZS4600:2005《冷成型钢结构规范》中畸变屈曲计算方法。
[Abstract]:In recent years, the strength of steel has been improved with the development of technology, and the cross-section form of cold-formed thin-walled steel members has become more and more complex and thin. The distortion buckling will control the bearing capacity of the members under a certain section shape and size. The study of distortion buckling in China is far from mature, and there is no relevant design regulation for distortion buckling in China code GB50018-2002. Based on the existing distortion buckling theory and experimental results, the deformation buckling behavior and stability bearing capacity of cold-formed thin-walled crimped channel steel members are numerically analyzed by finite element software ANSYS and finite strip program CUFSM. The main elements include: This paper summarizes the basic characteristics, development history and application prospect of cold-formed thin-walled steel members, and introduces the research situation of distortion buckling of cold-formed thin-walled steel members at home and abroad. The finite element analysis and finite strip analysis of the critical stress of elastic distortion buckling of cold-formed thin-walled steel axial compression members are carried out to verify the feasibility and practicability of the finite element method and the finite strip method. 2) several factors affecting the buckling capacity of cold-formed thin-walled steel members under axial compression, such as crimping height, plate thickness and web height, are compared and analyzed by using finite element software ANSYS, and some conclusions are drawn. The effect of skin bracing on the buckling behavior of cold-formed thin-walled steel members under axial compression is analyzed by using finite strip software CUFSM. This paper compares and analyzes the calculation methods of distortion buckling in Chinese GB50018-2002 Code for Cold-formed Thin-walled Steel members, North American AISI/NAS2007 Code for Cold-Forming Steel structure Design and Australia AS/NZS4600:2005 Code for Cold-Formed Steel structures.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU392.1

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