摘要
广东肇庆市阅江大桥主桥采用三跨双塔单索面预应力混凝土斜拉桥,跨径布置为(160+320+160)m,采用墩、塔、梁固结体系,桥面布置双向6车道。主梁采用单箱五室箱形预应力混凝土梁,按全预应力混凝土结构设计,采用纵、横、竖三向预应力体系,斜拉索锚固处设置1道横梁;采用单索面斜拉索,斜拉索呈扇形分2排布置于桥面中央分隔带内,避免了斜拉索对外侧景观的遮挡,视野开阔;桥塔选用了新颖美观、造型独特的"帆"形混凝土塔;主墩采用较柔的双肢薄壁墩(高度约33m),减少了主墩纵向刚度。采用Dr.Bridge 3.2及MIDAS 2010对主桥进行结构整体静力计算,计算结果表明,主桥结构各项指标均满足规范要求。
The main bridge of Yuejiang Bridge in Zhaoqing,Guangdong Province,is a threespan two-pylon prestressed concrete girder cable-stayed bridge with span arrangement of（160＋320＋160）m.Stay cables are arranged in single cable plane.The piers and pylons are fixed to the main girder.The bridge carries dual six traffic lanes,three lanes on each direction.The main girder adopts the five-cell single box prestressed concrete girder,which are designed in accordance with a full prestressed concrete structure with longitudinal,transverse and vertical prestressing systems.At the anchoring locations of the stay cables on the girder,a cross beam is installed.The stay cables are fanned out in single cable plane,two rows of stay cables are anchored in the median of the bridge deck,reducing the visual interruption to the minimum.The pylons,sail-shaped concrete structures,are aesthetically pleasing and unique.The main piers are the flexible two-columned thin-wall piers with a height of 33 m,favorably reducing the longitudinal stiffness of the main piers.The Dr.Bridge 3.2and MIDAS 2010 were used to calculate the overall structural static forces.The results of the calculation indicate that all the indexes of the main bridge structure meet the code requirements.
出处
《世界桥梁》
北大核心
2015年第4期11-14,共4页
World Bridges
关键词
斜拉桥
预应力混凝土梁
单索面
“帆”形塔
双肢薄壁墩
桥梁设计
结构计算
cable-stayed bridge
prestressed concrete girder
single cable plane
sail-shaped pylon
two-columned thin-wall pier
bridge design
structural calculation
