Static and Dynamic Analysis on Fly-Swallow Type Arch Bridge

doi:10.3969/j.issn.1674-0696.2013.sup.1.35

Abstract

Abstract: Fly-swallow type arch bridge has characteristics of strong spanning，high carrying capacity，self-balancing thrust， strong adaptability and elegant structure． According to a new three-span continuous self-anchored fly-swallow type basket CFST arch bridge，the space bar finite element model of the bridge was established using Finite Element Analysis software Midas Civil and space mechanical characteristics of the arch bridge were analyzed，so as to access the structure static，dynamic characteristics and the stability of construction process as well as the finished bridge． Through comparative analysis， the resistance of both main arch ribs and side span were greater than the combination of axial force． At the same time，the stability safety factors of structure on various main construction stages were greater than 4． So the static and dynamic characteristics of the arched bridge are of high performance，which meets the requirements of the design specifications．

Key words: concrete filled steel tube, fly-swallow type arch bridge, static analysis, natural vibration characteristics, stability

摘要： 飞燕式拱桥具有跨越能力大、承载能力高、自平衡推力而地基适应能力强、造型优美的优点。以一座新建三跨连续自锚飞燕式提篮钢管混凝土拱桥为工程背景，通过有限元分析软件MidasCivil建立该大桥的空间杆系有限元模型，对该拱桥的空间受力特点进行分析，评定其结构静力、动力特性和施工过程以及成桥后的稳定性能。计算结果与分析表明，主拱肋及边跨各截面的抗力均大于组合轴力，同时各个主要施工阶段结构稳定安全系数均大于4。因此，该拱桥结构静动力性能优良，满足设计规范要求。

关键词: 钢管混凝土, 飞燕式拱桥, 静力分析, 自振特性, 稳定性

CLC Number:

O319.56

Shi Zhou，Su Weifeng，Guo Junli，Pu Qianhui. Static and Dynamic Analysis on Fly-Swallow Type Arch Bridge[J]. Journal of Chongqing Jiaotong University(Natural Science), 2013, 32(增1): 873-878.

施洲，苏威风，郭俊丽，蒲黔辉. 飞燕式拱桥结构静动力特性分析[J]. 重庆交通大学学报（自然科学版）, 2013, 32(增1): 873-878.

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