考虑腹板屈曲后强度时钢梁刚度计算  

The Calculation of Stiffness of the Beam Considered the Post-buckling Strength

作　　者：戴森[1] 朱冰冰[1] 曹平周[1] 

机构地区：[1]河海大学土木工程学院,江苏南京210098

出　　处：《常州工学院学报》2005年第B12期41-44,共4页Journal of Changzhou Institute of Technology

摘　　要：利用腹板屈曲后强度设计的钢梁,达极限承载力状态时的截面刚度比梁全截面有效时的刚度小。本文使用有限元分析的方法,研究腹板高厚比和翼缘宽厚比对腹板屈曲后的梁截面刚度的影响。引入刚度修正系数来考虑梁截面刚度的减小,提出了简支梁有效截面惯性矩、刚度修正系数的计算公式和钢梁刚度的计算方法。In the condition of considering the web＇s post-buckling strength, the stiffness of the beam is smaller than the stiffness of beam whose whole section is efficient when the beam is reach ultimate bearing capacity. The article use the methed of the FEM to study the influence of the rations of height to the thickness of the web the width to the thickness of the flange, and deduce the formula of calculating the efficient moment of inertia of the beam.

关 键 词：梁 屈曲后强度 高厚比 刚度 

分 类 号：TU393[建筑科学—结构工程]