圆钢管搭接节点极限承载力计算公式的改进

Improved design formulae for the ultimate capacity of unstiffened overlapped CHS joints

根据圆钢管搭接节点的最新试验数据和国际管结构数据库数据,对目前平面K圆钢管搭接节点极限承载力计算公式进行了对比分析.结果表明,目前计算公式均不能较好拟合试验数据.为此,提出了在平面K型节点极限承载力计算公式中增加参数τ(腹杆与弦杆壁厚比值)和OV%(搭接率),作为修改现行规范的参考.

A comparison is made on the ultimate capacity of design formulae fiat K unstiffened overlapped CHS joint according to the latest experiment data and the international test database is performed. The results show that the current design formulae can not simulate experimental data perfectly. Therefore, it is proposed that adding parameter τ （the ratio of ventral rod and cord thiokness） and Ov % （overlap ratio） in the current design formulae of the ultimate capacity for unstiffened overlapped CHS joints.