组合梁斜拉桥合理边中跨比探究  

Research on Reasonable Side to Mid-span Ratio of Composite Beam Cable-stayed Bridges

作　　者：林惠文 詹海鹏 LIN Huiwen;ZHAN Haipeng(China Communications Highway Planning and Design Institute Co.,Ltd,Beijing 100088 China)

机构地区：[1]中交公路规划设计院有限公司,北京100088

出　　处：《江苏建筑》2024年第2期44-46,共3页Jiangsu Construction

摘　　要：组合梁斜拉桥由于自重较混凝土轻,跨越能力更大,近年来得到广泛的应用。边中跨比是斜拉桥设计中一个重要的参数,不同的边中跨比对结构的刚度、内力等产生很大的影响。文章以420 m组合梁斜拉桥为例,建立多个有限元模型,分析探讨不同的边中跨比对斜拉桥的主梁、拉索、桥塔等构件的影响,得到组合梁斜拉桥合理的边中跨比。文章对实际工程设计有一定的指导意义。Composite beam cable-stayed bridges have been widely used in recent years due to their lighter self weight and greater crossing capacity compared to concrete bridges.The side to mid-span ratio is an important parameter in the design of cable-stayed bridges,and different side to span ratios have a significant impact on the stiffness,internal forces,and other aspects of the structure.This paper takes a 420 m composite beam cable-stayed bridge as an example,establishes multiple finite element models,analyzes and explores the effects of different side to span ratios on the main beam,cables,bridge towers,and other components of the cable-stayed bridge,and obtains a reasonable side to span ratio for the composite beam cable-stayed bridge.This paper has certain guiding significance for practical engineering design.

关 键 词：组合梁 斜拉桥 边中跨比 刚度 应力 

分 类 号：U448.216[建筑科学—桥梁与隧道工程]