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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2009, Vol. 28 ›› Issue (6): 982-985.DOI: 10.3969/j.issn.1674-0696.2009.06.02

• • 上一篇    下一篇

结构参数变化对钢管混凝土拱桥动力特性的影响分析

孙??昊1,钱永久1,蔡迎春2   

  1. 1.西南交通大学土木工程学院,四川成都610031;2.郑州大学环境与水利学院,河南郑州450001
  • 收稿日期:2009-08-06 修回日期:2009-09-02 出版日期:2009-12-15 发布日期:2015-04-15
  • 作者简介:孙??昊(1979—),男,河南新野人,博士研究生,主要从事桥梁结构的设计与评估研究。E-mail:sunhaoylz2003@163.com。
  • 基金资助:
    高等学校优秀青年教师教学科研奖励计划( A0110719950102)

Influence?of?Structural?Parameters?Variation?on?Dynamic?Characteristics??of?Concrete?Filled?Steel?Tubular?Arch?Bridge

SUN Hao1, QIAN Yong-jiu1, CAI Ying-chun2   

  1. 1.?School?of?Civil?Engineering,?Southwest?Jiaotong?University,?Sichuan?Chengdu?610031,?China?;?2.?School?of?Environment?＆?Hydraulic?Engineering,Zhengzhou?University,Henan?Zhengzhou?450001?,China
  • Received:2009-08-06 Revised:2009-09-02 Online:2009-12-15 Published:2015-04-15

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摘要： 以郑州黄河二桥主跨钢管混凝土拱桥为研究对象,采用ANSYS通用有限元程序,建立了该下承式钢管混凝 土拱桥动力计算的整体空间有限元计算模型;探讨了17种不同工况和损伤对桥梁的动力特性的影响。计算结果 表明:该钢管混凝土桥竖向刚度相对较强,面外刚度相对较弱;横撑的布置形式对桥跨结构的竖向刚度影响不大, 但对桥梁结构对面外刚度影响较大;撑脚的损伤对结构的第1阶自振频率的影响比较敏感的,但对结构的竖向刚 度影响不大;吊杆和桥面板的损伤对结构动力特性的影响基本没有变化。

关键词: 桥梁工程, 钢管混凝土拱桥, 结构参数, 有限元方法, 动力特性

Abstract: The?main?bridge?of?the?Zhengzhou?Yellow?River?2nd?Bridge?is?a?concrete?filled?steel?tubular（CFST）?arch?bridge.?Choosing?the?main?bridge?as?the?research?object?,the?finite?element?procedure?ANSYS?is?used?to?establish?the?3D?finite?element?dynamic?model.?In?order?to?analyze?the?influence?of?structural?parameters?variation?on?dynamic?characteristics,?17?different?conditions?are?considered?in?the?calculation?and?analysis?process.?The?results?show?that?the?vertical?rigidity?of?this?CFST?bridge?is?stronger?than?the?lateral?rigidity?of?CFST?arch?rib.?The?changes?of?the?transverse?brace?style?have?little?effect?on?the?vertical?rigidity,?but?have?great?impact?on?the?lateral?rigidity?of?the?CFST?arch?rib.?The?brace?damage?is?sensitive?to?the?influence?of?natural?vibration?at?first?step?;?but?the?brace?damage?has?little?effect?on?the?vertical?rigidity.?The?damages?of?suspenders?and?bridge?deck?slabs?influence?faintly?on?dynamic?characteristics?of?the?structure.

Key words: bridge engineering , concrete filled steel tubular arch bridge , structural parameters ;finite element method ;dynamic characteristic ;

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