伏龙大桥工程设计总结之结构与耐久性

传递路径简明的结构几何形体有助于提高结构效率，平顺的几何外形可减少形体突变引起的应力集中1]。这一条对于钢结构桥梁同样适用，控制应力在理想水平，可减轻桥梁病害。伏龙大桥作为景观桥梁，充分考虑景观的同时，对结构体系和关键构造的设计，也进行了研究分析与优化。通过精细的计算和对比分析，使结构传力路径可靠，受力合理；对局部构造进行详细的优化设计创新。找到使景观与结构受力和谐统一的结构体系及最优的局部构造。总体与局部受力合理是确保正常使用期桥梁耐久性得到保障的第一步。

Summary of Structure and Durability in Design of Fulong Bridge Project

The concise transmission path of structural geometry helps to improve the structural efficiency. A smooth geometric shape can reduce the stress concentration caused by sudden changes in the shape, which is also applicable to steel structural bridges. The controlling stress at an ideal level can reduce the bridge diseases. As a landscape bridge, Fulong Bridge fully considers the landscape, and the designs of structural system and key structures are studied, analyzed and optimized. By the refined calculation and comparative analysis, the structural force transmission path is reliable and the stress is reasonable. The local structures are optimized, designed and innovated in detail. The structural system making the landscape and the structural stress harmonized and unified is found, and the optimal local structure is given. The reasonable overall and local stresses are the first step to ensure the durability of bridges during the normal use.