摘要
针对网格结构的发展方兴未艾、极具活力 ,而铝合金圆管型截面构件在网格结构中的应用又日渐广泛的特点 ,通过对目前研究较少的细长 (长细比λ =6 9.4～ 194 .3)铝合金圆管型截面轴心受压构件稳定性的试验研究 ,得到构件的极限稳定承载力 ,应用最小二乘法原理拟合出构件的λ - φ曲线及相应的计算公式 .经与几种常见公式的计算结果对比 ,该公式的计算结果与试验结果吻合较其它公式的计算结果好 ,离散性小 ,所以构件的λ - φ曲线及相应的计算公式可以用于铝合金圆管型截面轴心受压构件的设计中 .
The development of latticed structure is very active at present, in which circular section aluminum-alloy members are increasingly used widely. This paper performs the stable ultimate load-carrying capacity of rarely researched slender members (slenderness ratio λ=69.4～194.3) under axially compressive load through testing. The λ-φ curve and the corresponding calculated formula are fitted by the least-square method. Compared with other constantly used formulas, results of this formula and testing are matched better than others. The curve and the corresponding formula can service in design for circular section aluminum-alloy members under axially compressive load.
关键词
铝合金圆管
轴心受压构件
极限承载力
稳定系数
试验
circular section aluminum-alloy
members under axially compressive load
stable ultimate load-carrying capacity
stability factor
experiment research
