Static and Dynamic Characteristics of Crescent Arch Bridge

doi:10.3969/j.issn.1674-0696.2013.sup.1.34

Abstract

Abstract: Taking a landscape bridge — crescent arch bridge in a city as the engineering background，the spatial finite beam and link element model of full bridge was established by Medias Civil． The structure performance under static loads， the dynamic characteristics and stability performance were analyzed in detail． The analysis results show that: the spatial structure of the bridge span is reasonable with good rigidity and strength; the structural fundamental vibration mode is horizontal first order with the frequency value as 0． 93 Hz; the stability safety factors of major construction phase are all greater than 4． 0，so the structure has good stability．

Key words: landscape bridge, concrete-filled steel tube arch bridge, crescent arch, static and dynamic characteristics, stability

摘要： 以某城市景观桥梁———新月拱桥为工程背景，运用MidasCivil建立全桥空间杆系有限元模型，对其施工全过程的静态受力、动力特性及稳定性进行分析。研究结果表明:空间桥跨结构受力合理，具有良好的刚度与强度;结构振动基频为0．93Hz，为横向1阶;各主要施工阶段的稳定安全系数均大于4．0，具有良好的稳定性。

关键词: 景观桥梁, 钢管混凝土拱桥, 新月拱, 静动力特性, 稳定性

CLC Number:

U448.22

Shi Zhou，Guo Junli，Su Weifeng，Pu Qianhui. Static and Dynamic Characteristics of Crescent Arch Bridge[J]. Journal of Chongqing Jiaotong University(Natural Science), 2013, 32(增1): 869-872.

施洲，郭俊丽，苏威风，蒲黔辉. 新月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): 869-872.

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