钢管混凝土拱桥模型试验研究-土木工程专业论文.docxVIP

哈尔滨工业大学工学硕士学位论文 - I - 摘要 钢管混凝土结构具有承载能力强、施工简便、塑性和韧性好、耐火和耐腐蚀 性能好等优点。其在现代结构工程中，特别是桥梁结构方面得到了越来越广泛的 应用。我国第一座钢管混凝土拱桥—四川旺苍东河大桥于 1990 年建成，在随后不 到 30 年的时间里，我国建造的钢管混凝土拱桥总数已超过 200 座。同时，我国钢 管混凝土拱桥相关的设计方法和施工技术取得了很大的进展，但是在理论研究和 相关规范的制定上尚有很多工作要做。本文着眼于钢管混凝土拱桥的模型试验研 究，借助于有限元通用计算软件，对大管径圆形钢管混凝土短柱受力性能、钢管 混凝土拱桥成桥阶段受力性能及基本动力特性进行了探讨。 本文总结了国内外学者在钢管混凝土结构力学性能分析方面的研究成果；通 过对钢管混凝土试件承载能力试验实测值与有限元软件计算值及现有规程计算值 进行比较分析，得出相关结论；通过对模型桥静载试验所采集的实验数据与有限 元仿真分析结果进行对比分析，验证了模型桥试验的有效性和仿真分析的准确 性，并得出相关结论；参考实桥特征值分析结果设计模型桥动力特性试验工况， 对试验数据与计算结果进行比较分析，获得了实桥的基本动力特性参数并校核了 其准确性，并对后续的试验提出了建议。 关键词：模型试验；钢管混凝土拱桥；有限元；承载能力；动力特性 - II - Abstract Concrete-Filled Steel Tubular (CFST) has been more and more widely applied in modern structural engineering, especially in the area of bridge construction, for it has so many kinds of advantages, such as high load capacities, good plastic and ductility, convenience to construction, good fire and corrosion resistance, to name but a few. The first CFST Arch Bridge of china named SiChuan WangCang East River Bridge was built in 1990, and China had completed more than 200 CFST Arch Bridges in the following less than 30 years, during which Chinas related construction technology and design methods had made great progress. Even though, there leaves great space to develop in the theoretical study and related norm-setting. Thus this thesis focuses on the model test study of CFST Arch Bridge and discusses such characteristics as short column forcing capacity of large-diameter circular CFST, finished bridge forcing capacity of CFST Arch Bridge and basic dynamic characteristics with the help of general-purpose finite element software. This dissertaion first summarizes the research results of scholars from home to abroad in structural dynamics of CFST and gets some related conclusions through the comparative analysis of measured values in the test of CFST specimens load capacity, calculated values of finite element software and the exsiting calculated values. The author then tries to verify the ef