中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2013, Vol. 32 ›› Issue (5): 903-906.DOI: 10.3969 /j.issn.1674-0696.2013.05.01

• •    下一篇

斜靠式拱桥振动特性分析

王建秋1 ,何发礼2 ,朱东生1   

  1. 1. 重庆交通大学土木建筑学院,重庆400074; 2. 成都城投基础设施建设投资有限公司,四川成都610015
  • 收稿日期:2012-09-12 修回日期:2013-01-05 出版日期:2013-10-15 发布日期:2014-10-27
  • 作者简介:王建秋( 1987—) ,男,黑龙江呼玛人,硕士研究生,主要从事桥梁抗震及结构分析方面的研究。E-mail: wangjianqiu2006@163. com。

Vibration Characteristics of Leaning Arch Bridge

Wang Jianqiu1,He Fali2,Zhu Dongsheng1   

  1. 1. School of Civil Engineering & Architecture,Chongqing Jiaotong University,Chongqing 400074,China; 2. Chengdu CCIMG Infrastructure Construction Investment Co. Ltd. ,Chengdu 610015,Sichuan,China
  • Received:2012-09-12 Revised:2013-01-05 Online:2013-10-15 Published:2014-10-27

摘要: 以拉萨市柳梧大桥主桥为工程背景,采用有限元软件MIDAS /Civil 建立空间有限元计算模型,分别对其动力 特性、地震响应、副拱倾角变化对结构性能的影响进行分析。计算结果表明: 该桥的低阶振型以桥面系的横弯为主, 桥面系横向刚度较弱; 地震波单向输入和三维输入时,主副拱各控制截面内力的变化规律和影响程度不同; 副拱倾 角增大可显著提高结构的横向刚度,能减小拱肋面外弯矩和拱顶横向位移,而对主拱轴力影响相对较小。

关键词: 斜靠式拱桥, 动力特性, 地震响应, 倾角变化

Abstract: Taking Liu-Wu Bridge in Lhasa as the research project,the finite element model of the bridge was established by using the software MIDAS /Civil. The dynamic characteristics,seismic response and vice arch inclination change were analyzed, in order to study the performances of the structure. The results show that the low-order mode shapes of the bridge is mainly the transverse bending of the deck,the lateral stiffness of the deck is weaker; when the waves are inputted in one direction and three dimension,the change rules and influence degree are different in the internal forces for each control section of the lord vice arch. The enlargement of vice arch inclination angle significantly improves the lateral stiffness of structure, and decreases the bending moment of arch rib as well as the lateral displacement of the arch top. But it has little impact on the internal forces of the main arch.

Key words: leaning arch bridge, dynamic characteristics, seismic response, inclination change

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