杭瑞高速洞庭湖大桥索塔造型方案及结构设计

Landscape Scheme and Structure Design of the Pylons of Dongting Lake Bridge at Hangzhou-Ruili Expressway

杭州—瑞丽高速公路洞庭湖大桥主桥为(1480+453.6)m双塔双跨钢桁梁悬索桥,在满足受力条件下,为达到良好的桥梁景观效果,基于桥址人文历史背景,提出了桥梁总体设计风格,并通过各设计要素对索塔方案进行美学构思和比选,确定索塔立面构型和色彩风格。在此基础上,根据整体和局部有限元计算结果确定塔柱、横梁和基础等构件的构造尺寸,优化局部构造细节。计算结果表明,洞庭湖大桥索塔各项受力指标均能满足规范要求;桥梁景观实施效果良好,达到了既定目的。洞庭湖大桥索塔的设计思想、结构设计和构造细节处理方案可供同类型桥梁设计参考。

The main bridge of the Dongting Lake Bridge on Hangzhou-Ruili Expressway is a(1480+453.6)m double-tower and double-span steel truss girder suspension bridge.Under the force condition,the overall design style of the bridge is proposed for landscape effect based on the cultural and historical background of the site,and the aesthetic conception and comparison of the cable tower scheme are carried out through the design elements,and the facade configuration and color style of the cable tower are determined.On this basis,the structural dimensions of tower columns,beams and foundations are determined according to the global and local finite element calculation results,and local structural details are optimized.The calculation results show that all the force indexes of Dongting Lake Bridge's cable tower can meet the requirements of the specification,the bridge landscape implementation effect is good,and the established purpose has been achieved.The design idea,structural design and structural details scheme of the Dongting Lake Bridge's pylons can provide reference for the design of the same type of bridges.