太原市机场路祥云桥桥塔设计

太原市机场路祥云桥主桥为独塔混合梁斜拉桥,桥塔由3根塔柱组成,空间呈火炬造型,在桥面以上为钢塔柱,在桥面以下为混凝土结构.钢塔柱内部加劲肋按照半刚性加劲肋的原则设计；塔柱联结系采用刚接方案,3根塔柱之间设置20道空间水平联结系；在钢塔柱与混凝土塔柱间设置钢—混凝土结合段(高7.05 m),主要传力构件为PBL剪力键；塔顶钢塔帽将3根塔柱顶端固结,其下段为连接塔柱的重要受力构件,上段为装饰构造；斜拉索在中塔柱内采用双锚箱的方式锚固,在边塔柱内采用锚梁的方式锚固；斜拉索向塔柱圆弧外侧拉伸锚固；3根塔柱采用整体式基础方案,承台间设置系梁.

Design of Pylon of Xiangyun Bridge on Airport Road, Taiyuan City

The main bridge of the Xiangyun Bridge on Airport Road,Taiyuan City is a single pylon hybrid girder cable-stayed bridge.The pylon of the bridge is composed of 3 pylon columns and spatially it is configurated like a torch.The part of the pylon above the deck is of the steel columns and that under the deck is of the concrete structure.The stiffeners inside the steel columns are designed on the principle of semi-rigid stiffeners and the tie systems of the columns are connected by way of rigid fixity.Among the 3 columns,totally 20 spatial horizontal ties are set and in between the steel columns and concrete structure,a steel and concrete joint section(7.05 m high) is set,in which the principal load transferring components are the PBL shear studs.The 3 pylon columns are rigidly fixed at their tops by a steel cap,of which the lower part is the important load bearing component for fixing of the columns while the upper part is the decorative structure.The stay cables are anchored in the middle pylon column by the double steel anchor boxes and in the side columns by the anchor beams and the cables are tensioned outwards the round arc of the columns and anchored.The 3 columns are all supported on an integral foundation,the pile caps of which are connected by the tie beams.