[1]申红侠.高强钢焊接薄腹矩形管截面压弯构件平面内的极限承载力[J].西安建筑科技大学学报:自然版,2015,47(05):642-648.[doi:DOI:10.15986/j.1006-7930.2015.05.006]
 SHEN Hongxia.In-plane ultimate carrying capacity of high-strength steel welded thin-webbedrectangular tube section beam-columns[J].J.Xi’an Univ. of Arch. & Tech.:Natural Science Edition,2015,47(05):642-648.[doi:DOI:10.15986/j.1006-7930.2015.05.006]
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高强钢焊接薄腹矩形管截面压弯构件平面内的极限承载力()
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西安建筑科技大学学报:自然版[ISSN:1006-7930/CN:61-1295/TU]

卷:
47
期数:
2015年05期
页码:
642-648
栏目:
出版日期:
2015-10-29

文章信息/Info

Title:
In-plane ultimate carrying capacity of high-strength steel welded thin-webbed
rectangular tube section beam-columns
文章编号:
1006-7930(2015)05-0642-07
作者:
申红侠
(西安建筑科技大学土木工程学院,陕西 西安 710055)
Author(s):
SHEN Hongxia
(School of Civil Engineering, Xi’an Univ. of Arch. & Tech., Xi’ an 710055, China)
关键词:
 高强度钢焊接矩形管截面偏压构件局部-整体相关屈曲极限承载力有限元法
Keywords:
high strength steel welded rectangular tube section eccentric compression members local-overall interaction bucklingultimate carrying capacity finite element method
分类号:
TU391; TU323.1; TU311.2
DOI:
DOI:10.15986/j.1006-7930.2015.05.006
文献标志码:
A
摘要:
本文采用ANSYS有限元软件建立模型分析了高强钢(名义屈服强度为460 MPa)腹板高厚比超限的焊接矩形管截面偏
压构件的极限承载力,以及构件长细比、腹板高厚比、翼缘宽厚比和相对偏心率对极限承载力的影响,提出腹板高厚比超限
高强钢压弯构件平面内极限承载力计算公式.研究表明:考虑初弯曲和残余应力影响的双重非线性有限元模型能够很好地模
拟高强钢焊接箱形截面偏心受压构件的局部-整体相关屈曲;高强钢薄腹矩形管截面压弯构件平面内无量纲化极限承载力
Pu/(Afy)与构件长细比、腹板高厚比和翼缘宽厚比近似为线性关系;高强钢薄腹矩形管截面偏压构件的轴力和弯矩相关曲线
近似为直线;按边缘纤维屈服准则推导的公式经过修正之后可用于计算高强钢压弯构件局部-整体相关屈曲的极限承载力.
Abstract:
The ultimate load-carrying capacity of eccentrically loaded welded rectangular tube section members made from high
strength steel with a nominal yield stress of 460 MPa was analyzed by ANSYS finite element program. The influences of the slenderness
ratio, web depth-to-thickness ratio, flange width-to-thickness ratio, and relative eccentricity ratio on the ultimate bearing
capacity were investigated. The calculation formulas for predicting the in-plane ultimate carrying capacity of high strength steel
beam-columns with large depth-to-thickness ratios were proposed. The study shows that the double nonlinear finite element model
with the geometric imperfections and residual stresses taking into account can simulate the local-overall interaction buckling behaviors
of the eccentrically loaded welded box-section compression members. The nondimensional in-plane ultimate bearing capacity
Pu/(Afy) is approximately linear with the increase of the slenderness, depth-to-thickness and width-to-thickness ratio, respectively.
The correlation curves between the axial force and flexural moment of the high-strength steel thin-webbed rectangular tube section
beam-columns are nearly linear. The formula deduced from the yielding criterion of the cross-sectional edge stresses after having
been modified can be used to predict the local-overall interactive buckling strength of high strength steel beam-columns.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2015-05-25 修改稿日期:2015-10-12
基金项目:“十二五”科技支撑计划课题(2013BAJ10B03-0)
作者简介:申红侠(1969-),女,博士,副教授,主要从事钢结构和组合结构研究.E-mail: shenhongxia88@126.com
更新日期/Last Update: 2015-12-14