【摘要】 根据薄壁构件弯曲与扭转理论,在弹性约束条件下对H型截面构件的势能方程进行推导,并由最小势能原理,导出了弹性约束条件下H型截面构件稳定计算的单元刚度矩阵。分析了常见荷载作用时连续线弹性侧移约束的H型截面简支钢梁的弹性屈曲荷载,计算结果与Trahair的半解析解进行对比,证明了本方法计算结果正确。结果表明:在设计中若考虑弹性侧移约束的作用,可以显著地提高H型截面薄壁钢梁的稳定性。更多还原

【Abstract】 According to the classical theory of thin-walled members,this paper presents the derivation of energy equation under elastic restrained conditions and an elastic restrainted stiffness matrix of thin-walled members is derived.Results of elastic restraints steel beams subjected to common load are presented.According to Trahair’s,the results obtained demonstrate the accuracy of the method and restraintaction may apparently increase the buckling loads of thin-walled steel beams.更多还原