建筑结构学报2011，Vol.32Issue(11)：149-155,7.
Q460高强钢焊接箱形柱轴心受压极限承载力参数分析
Parametric analysis of ultimate bearing capacity of Q460 high strength steel welded box columns under axial compression
摘要
Abstract
A parametric analysis on ultimate bearing capacity of fabricated box-section steel columns with the nominal yield strength of 460 MPa was presented.The analysis aims to investigate whether the current design codes for ordinary steel are applicable for high strength steel columns or whether the codes need to be modified to include high strength steel.The calculation program base on numerical integration method（NIM） was written by authors.And the commercial finite element analysis software ANSYS was also adopted for comparison.Numerical models including initial geometric imperfections and residual stresses were verified by test results.The main parameters were width to thickness ratio and column slenderness,which ranged from 7.8 to 17.2 and from 10 to 130 respectively.The effects of residual stresses and initial geometric imperfections on the ultimate bearing capacity with varyious parameters were investigated and discussed.A proposal for the design of high strength steel columns was given based on the comparison of parametric analysis with GB 50017—2003.The curve b,which is higher than the suggested curve c for ordinary steel welded box columns,suits better for the design of box columns fabricated from Q460 steel plates with width to thickness ratio no more than 20.关键词
高强钢/焊接箱形柱/轴心受压/极限承载力/参数分析Key words
high strength steel/welded box column/axially compressed/ultimate bearing capacity/parametric analysis分类
建筑与水利引用本文复制引用
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,2011,32(11):149-155,7.基金项目
国家自然科学基金项目 （）
