摘要
以与直径135 m摩天轮组合的112m大跨度简支双层钢桁架桥为例,介绍了钢桁架桥的特点及在城市景观桥梁建设中的优势,并介绍了该钢桁架桥的结构布置、杆件及节点形式、桥面及附属构造、桥台及基础、摩天轮构造及抗震构造等设计要点.采用有限元软件MIDAS Civil,对钢桁架桥强度和变形等结构受力性能进行分析,计算结果表明该桥设计合理.该大跨度简支双层钢桁架桥的设计思路、计算分析及施工方法可为类似钢桁架桥的设计提供技术参考.
Abstract
Taking the 112 m long-span simple-supported double-layer steel truss bridge combined with a 135m diameter ferris wheel as an example,the characteristics of the steel truss bridge and its advantages in urban landscape bridge construction are introduced.In addition,the structural layout,member bars and node forms,bridge deck and ancillary structures,bridge abutments and foundations,ferris wheel structure,seismic structure and other design essentials of the steel truss bridge are introduced.The finite element software Midas Civil is used to analyze the structural stress performance of the steel truss bridge,including strength and deformation.The calculation results show that the bridge design is reasonable.The design concept,calculation analysis,and construction method of this long-span simple-supported double-layer steel truss bridge can provide technical reference for the design of similar steel truss bridges.
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