【作者】 吴臻旺；

【导师】 郑凯锋；

【作者基本信息】 西南交通大学 ， 桥梁与隧道工程， 2006， 硕士

【摘要】 论文以在建的东江大桥为例，根据技术设计图纸，采用大型有限元计算软件MIDAS／CIVIL建立完整、详尽的全桥组合有限单元模型，旨在探讨分析加劲弦钢桁梁桥的静力与动力性能和稳定性。论文计算桥梁的各施工阶段和成桥阶段恒载作用下结构受力、成桥后荷载组合作用下结构受力；论文针对支座是否调整作对比计算分析，强调支座调整对三片钢桁之间受力协调的贡献；论文对桥面系和平纵联三种不同的连接方案作对比计算分析，论述了桥梁的空间结构行为对横梁水平弯曲作用的影响，并找到了相对可行的解决办法；论文计算桥梁的自振特性，并用反应谱法对地震响应进行计算；论文计算了桥梁的弹性稳定性。由此，作者比较全面地了解桥梁的静力与动力性能和稳定性，并掌握了加劲弦钢桁梁桥的计算分析方法。更多还原

【Abstract】 This thesis focuses on suspended stiffening steel truss bridge, containing the performance of static and dynamic, stability. Firstly, the author presents process of building up detailed integrated finite element models for Dongjiang Bridge by MIDAS/CIVIL, a large-scale FEM soft wares. The structural behavior under loads of construction stages and completed bridge stage are analyzed. Harmonized force among the three steel trusses contributed by supports adjustment is emphasized, by the means of compared analysis of adjusting supports or not. After calculating three schemes of different connecting order of floor system and longitudinal horizontal brace, this thesis discusses the influence of spatial behavior of structure upon horizontal buckling of crossbeams, and finds a relative valuable technique to solve the problem. Then, seismic responses of this bridge are studied by the response spectrum analysis, and the elasticity stabilities of it are also calculated. Therefore, the performance of static and dynamic, stability and analysis method of suspended stiffening steel truss bridge are understood roundly.更多还原