H型钢楔形薄壁梁相关屈曲性能分析

杨娜; 龙丽华; 杨庆山

doi:10.13204/j.gyjz200701024

H型钢楔形薄壁梁相关屈曲性能分析

doi: 10.13204/j.gyjz200701024

1.
北京交通大学土建学院北京 100044

基金项目:

国家自然科学基金资助项目(批准号:50308001);北京交通大学校基金资助项目(批准号:2005SM038)

详细信息

作者简介:
杨娜女 1974年 8 月出生博士副教授 Email:yangnahit@ sina. com

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- 文章访问数: 59
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- 被引次数: 0
出版历程
- 收稿日期: 2006-08-20
- 刊出日期: 2007-01-20

THE INTERACTIVE-BUCKLING ANALYSIS OF TAPERED H-SECTION STEEL BEAMS WITH THIN WEB

1.
School of Civil Engineering and Architecture Beijing Jiaotong University Beijing 100044

摘要

摘要: 以有限元分析软件ANSYS为平台,基于非线性板壳有限元分析理论,对轻型门式刚架中H型钢楔形薄壁梁的相关屈曲性能进行大挠度弹塑性分析。用Shell 18l单元对轻型门式刚架中H型钢楔形薄壁梁进行离散,考虑初始几何缺陷和残余应力的影响,对其进行全过程跟踪分析,从而对其相关屈曲性能进行深入的研究。从荷载-位移曲线、承载力、变形的发展和塑性区的分布等方面入手,对影响相关屈曲性能的因素(腹板高厚比、翼缘宽厚比、跨度、楔率等)进行系统的分析和研究,并与现行规范进行比较,得到一些有价值的结论。
- H型钢薄壁楔形梁 /
- 相关屈曲 /
- 初始几何缺陷 /
- 残余应力 /
- 楔率
Abstract: Based on the finite element method,the interactive buckling of tapered H-section steel beams used in portal frame structures are analyzed by ANSYS,in which geometric and material non-linearity are considered.The H-section tapered beams with thin web are dispersed by Shell 181 element and analyzed considering the geometric initial imperfection and the residual stress in the whole course.According to the load-deflection curves obtained,ultimate load-carrying capacity,deformation and the area of plasticity etc,the geometric parameters are analyzed systematically,which include web width-thickness ratio,flange width-thickness ratio,span and web tapering ratio etc.The interactive buckling of tapered H-section steel beams is discussed.By comparing the results obtained from the method with those of current Chinese technical specification,some valuable conclusions are drawn.
- tapered H -section beam with thin web /
- interactive buckling /
- geometric initial imperfection /
- residualstress /
- web tapering ratio

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参考文献(8)

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