空间索面自锚式悬索桥主索鞍计算方法

空间索面悬索桥主索鞍的承缆槽立面及平面线形应与全部恒载条件下的主缆线形相吻合,既有平曲线又有竖曲线使得整体式肋传力结构的索鞍处于复杂的三向空间受力状态,运用有限元程序对天津富民桥主索鞍进行有限元分析复核计算,提出一些索鞍计算的方法。

Calculation Methods for Main Cable Saddles of Spatial Cable Plane Self-Anchored Suspension Bridge

The geometric shapes of elevation and plan of the cable troughs in main cable saddles of the spatial cable plane self-anchored suspension bridge should accord with those of the main cables of the bridge under the action of whole load cases,and should have both the plan curve and vertical curve to keep the integral cable saddle structure with its ribs transferring forces in a state of complicated spatial force bearing conditions.In this paper,the finite element package is used to carry out a check calculation of the main cable saddles of Fumin Bridge in Tianjin and some of the methods for calculation of the cable saddles are provided as well.