新型哑铃形钢管混凝土拱肋极限承载力计算方法

Calculation Method of the Load-carrying Capacity of New Type Dumbbell-Shaped CFST Arch Rib

新型哑铃形钢管混凝土构件能有效地解决传统哑铃形钢管混凝土构件在施工过程中出现的爆管问题,这一截面形式已逐渐应用于实际的拱桥之中,然而对实际的新型哑铃形拱肋极限承载力的验算尚未见报道.基于某一新型哑铃形拱桥的设计数据,利用3种不同的验算方法对该新型哑铃形拱肋进行极限承载力验算比较,最终提出了适用于新型哑铃形截面钢管混凝土拱肋极限承载力的计算方法.

New dumbbell-shaped concrete filled steel tube（CFST） member has been gradually applied to the bridges for its effective function in solving the blasting problem that existed in traditional dumbbell-shaped section during the construction process.While there are no relevant reports about the calculation methods on load-carrying capacity of new dumbbell-shaped arch rib.Based on three different regulations,this paper finally proposed an appropriate method that can be used to calculate the load-carrying capacity of this new section through comparing the results of other calculation methods.And this method is certified with the design load data which is collected from a real new dumbbell-shaped arch bridge.