双索面矮塔斜拉桥主梁空间计算分析

The Calculation and Analysis of the Girder of Extradoses Cable-stayed Bridge with Double-cable Plane

混凝土矮塔斜拉桥主梁多选用单箱多室截面,其箱室的布置受索塔位置的影响,长山大桥采用双塔双索面,其主梁的形式不同于常规的单箱多室截面,采用扁平流线型截面。本文计算分析了长山大桥主梁在成桥阶段下的受力状态,对此类截面主梁的受力特点进行了初步探讨。

The single box multi chamber section is often used in the girder of extradoses cable-stayed bridge. The box room layout is affected by the position of the tower. The Twin Towers and double-cable plane is used in the Changshan Bridge. The main form is the streamlined section that is different from conventional single box multi section. This article calculated and analyzed the stress state of main girder bridge under the stage of the Changshan Bridge, and discussed this kind of girder stress characteristics.