中文核心期刊
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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） ›› 2010, Vol. 29 ›› Issue (3): 329-332.

• •    下一篇

独塔斜拉与连续刚构组合桥梁动力特性 及参数影响分析

冯东明1,李爱群1,李建慧1,杨光2   

  1. 1.东南大学土木工程学院混凝土及预应力混凝土结构教育部重点实验室, 江苏 南京 210096; 2.铁道第四勘察设计院, 湖北 武汉 430063
  • 收稿日期:2010-01-22 修回日期:2010-03-09 出版日期:2010-06-15 发布日期:2015-01-22
  • 作者简介:冯东明(1985一),男, 山东潍坊人, 硕士研究生, 主要从事大跨度桥梁结构分析。E-mail:feng200111@163.com。
  • 基金资助:
    国家杰出青年基金项目(50725828);国家自然科学基金重点资助项目(50538020)

Reach on Dynamic Behavior and Parameter Influence of Single Pylon Cable-Stayed and Continuous Rigid-Frame Composite Bridge

FENG Dong-ming1, LI Ai-qun1, LI Jian-hui1, YANG Guang2   

  1. 1.School of Civil Engheering, Key Laboratory for Concrete & Prestressed Concrete Structures of Education Ministry Southeast University Nanjing 210096,Jiangsu,China; 2.The 4th Survey & Design Institute of China Railways,Wuhan 430063,Hubei,China
  • Received:2010-01-22 Revised:2010-03-09 Online:2010-06-15 Published:2015-01-22

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摘要： 为分析国内首座独塔斜拉连续刚构组合结构体系铁路桥梁的动力特性,以Midas/Civil2006为平台,介绍其 空间有限元模型的建模策略;采用子空间迭代法对这种独特的组合体系进行动力特性分析,给出了前10阶频率和 相应的振型;同时,分别计算了恒载集度和弹性模量2种主要结构参数变化对动力特性的影响,并对其规律作出了 讨论分析。计算结果表明:斜拉刚构组合结构振动特性兼有斜拉桥和刚构桥的特点,受恒载集度和弹性模量等结 构参数变化影响较大。

关键词: 独塔斜拉, 连续刚构, 组合体系, 有限元模型, 动力特性

Abstract: Ihe dynarmic characteristics of the first single pylon cable-stayed and continuous rigid-frame hybrid girder bridge in China are analyzed on the basis of Midas/Civi12006.The strategies of modeling 3D FEM model in simulating process are introduced.The self-vibration behavior of this unique bridge is analyzed by adopting the subspace iteration method,the first 10 0rder frequencies and corresponding vibration modes are also given. Meanwhile,different structural parameters, such as dead load intensity and elastic modulus, which have influence on dynamic characteristics, are calculated respectively Fur- thermore, its rule is discussed and analyzed. The calculating results indicate that the cable-stayed continuous rigid-frame hybrid bridge possesses both features of the cable-stayed bridge and the continuous rigid-frame bridge;and the hybrid bridge is greatly influenced by dead load intensity and elastic modulus. The analysis results mentioned above provide refer- ence for natural vibration analysis and earthquake-resistance design of this hybrid bridge.

Key words: single pylon cable-stayed bridge;continuous rigid-frame bridge;cambination system structure;finite element model, dynamic characteristic

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