Taking the long span continuous rigid - frame structure of the south bank approach spans of wuhan tianxingzhou changjiang river bridge as the research object , and using the large scale finite element analysis program ansys and two ways of modeling with solid element and spatial beam element , this paper respectively analyzes the dynamic characteristics of the rigid - frame structure of the approach spans , makes a study of the influences of rigidity changes and bearings failure of the thin - wall piers on the dynamic characteristics of the structure of the approach spans and also compares the results of numerical analysis of the two kinds of modeling 摘要以武汉天兴洲长江大桥南岸引桥大跨度连续刚构为研究对象,运用大型有限元分析程序ansys ,采用实体模型与空间梁单元两种建模方式,分别分析了其动力特性,探讨了薄壁墩的刚度变化与支座失效对其动力性能的影响,并对两种模型的数值分析结果进行了比较。
This paper studies the key techniques involved in the construction of the deep water foundations , long - span prestressed concrete continuous rigid - framed girders and long - span concrete - filled steel tube arches of yichang changjiang river bridge on the newly built yichang - wanzhou railway , and also provides solutions to the possible problems thereof , which may be of certain guiding roles to the practical construction 摘要对新建铁路宜昌至万州线宜昌长江大桥深水基础、大跨度混凝土连续刚构梁、大跨度钢管混凝土拱等施工过程中遇到的关键技术问题进行了研究,并对各个问题提出了解决方案,对实施性施工有一定的指导意义。