银川滨河黄河大桥三塔自锚式悬索桥主塔设计

Design of Main Tower of Triple-Tower Self-Anchored Suspension Bridge of YinChuan Binhe Yellow River Bridge

银川滨河黄河大桥主桥采用三塔双索面组合梁自锚式悬索桥,跨径布置为(88+218+218+88)m。为兼顾受力和美观,确定中、边塔采用相同的结构形式及构造尺寸,主塔采用横向H型、纵向单柱型结构,塔柱为钢筋混凝土构件,横梁为预应力混凝土构件。对主塔形式选取、结构构造、施工方案作了详细介绍,并重点对中塔刚度与结构关键力学指标的关系进行了详细数值分析。

The main bridge of YinChuan Binhe Yellow River Bridge is a self-anchored composite girder suspension bridge with triple towers,double cable planes and with span arrangement 88 m + 218 m +218 m +88 m. To take account of mechanics performance and artistic appearance, the three towers are designed with the same structural style and size. The towers are reinforced concrete structures with prestressed concrete crossbeam. In the transverse direction of the bridge,the towers take the H shape while in the longitudinal direction, take the single column shape. The main tower structural style, construction scheme are introduced in detail, and focuses on the relationship of middle tower stiffness and structure key mechanical parameters are detailed by numerical analysis.