[1]黄文锋,邹孔庆,孙建鹏,等.普立特悬索桥抖振响应时域分析[J].西安建筑科技大学学报:自然科学版,2015,47(03):371-375,381.[doi:10.15986/j.1006-7930.2015.03.011]
　HUANG Wenfeng,ZOU Kongqing,SUN Jianpeng,et al.Buffeting response analysis of the suspension bridge in time domain[J].J.Xi’an Univ. of Arch. & Tech.:Natural Science Edition,2015,47(03):371-375,381.[doi:10.15986/j.1006-7930.2015.03.011]
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普立特悬索桥抖振响应时域分析()
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西安建筑科技大学学报:自然科学版[ISSN:1006-7930/CN:61-1295/TU]

卷:
47
期数:
2015年03期
页码:
371-375,381
栏目:
出版日期:
2015-06-30

文章信息/Info

Title:
Buffeting response analysis of the suspension bridge in time domain
文章编号:
1006-7930(2015)03-0371-05
作者:
黄文锋1;  邹孔庆1; 2;  孙建鹏3;  王美芹1
(1 合肥工业大学,安徽 合肥 230009;2 中铁四局集团钢结构有限公司,安徽 合肥 230022;3 西安建筑科技大学,陕西 西安 710055)
Author(s):
HUANG Wenfeng 1; ZOU Kongqing 1; 2; SUN Jianpeng 3; WANG Meiqin 1
(1. Hefei University of Technology, Hefei 230009, China; 2. Steel Structure Co., Ltd., China Railway Siju Civil Engineering Group, Hefei 230022, China; 3. Xi’an Univ. of Arch . Tech ., Xi’an 710055, China)
关键词:
大跨度悬索桥; 风场模拟; 自激力; 抖振; 时域分析
Keywords:
long span suspension bridge;  wind field simulation;  self-excited forces;  buffeting;  time domain analysis
分类号:
TU352.2
DOI:
10.15986/j.1006-7930.2015.03.011
文献标志码:
A
摘要:
普立特大桥是一座山区大跨悬索桥，为高柔的风敏感结构．在分析抗风性能时，利用ANSYS 软件，建立了普立特悬索桥的三维有限元模型，分析了该模型的动力特性，根据Deodatis 的谐波合成法模拟了桥梁的随机脉动风场并进行了检验， 然后基于准定常理论计算了作用于模型上的抖振力时程，自激力以单元气动刚度及阻尼矩阵的形式在ANSYS 中以Matrix27 矩阵输入，最后由时程分析求得桥梁在考虑与不考虑自激力作用时的抖振响应．计算结果表明考虑自激力后主要改变了桥梁振动的平衡位置和在部分方向振动中起到正阻尼作用，为同类桥梁的抗风设计计算提供参考.
Abstract:
PLT Bridge is a long-span suspension bridge in the hills which is a high-rise flexible and wind sensitive structure. Thus, the wind-resistant capacity must be considered for the bridge. The 3D finite element model of bridge was established by using ANSYS software, and its dynamic characteristics were then obtained. With spectral representation method proposed by Deodatis, fluctuating wind fields for the bridge were generated and validated. Then, the time-history of buffeting force was calculated by using the quasi-steady theory. The self-excited forces are considered in form of the element aerodynamic damping matrix and aerdynamic stiffness matrix with Matrix 27 in ANSYS. Finally, buffeting analysis with and without considering self-excited forces in time domain were calculated by using time history analysis. The results show that, when considering self-exicted forces, it mainly changes the equilibrium position of bridge vibration and the positive damping effect can be found in some directions of the bridge. This study can provide reference for the wind-resistant design of similar bridges.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期：2014-10-31   修改稿日期：2015-05-31
基金项目：国家自然科学青年基金项目(51408174);安徽省自然科学青年基金（1408085QE95）；中国博士后科学基金第54 批面上项目（2013M54051 中央高校基本科研业务费专项基金（JZ2014HGBZ0049）
作者简介：黄文锋（1982-），男，博士，副教授，主要研究方向为风特性、结构抗风. E-mail:wfhuang@163.com
更新日期/Last Update: 2015-09-01