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[1]卢海林,吴玏,黄民水,等.环境激励下大跨度连续刚构桥动力分析模型修正[J].武汉工程大学学报,2013,(05):15-21.[doi:103969/jissn16742869201305004]
　LU Hai lin,WU Le,HUANG Min shui,et al.Analysis model updating of longspan continuous rigidframe bridge dynamic under environment excitation[J].Journal of Wuhan Institute of Technology,2013,(05):15-21.[doi:103969/jissn16742869201305004]
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环境激励下大跨度连续刚构桥动力分析模型修正(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
期数:
2013年05期
页码:
15-21
栏目:
资源与土木工程
出版日期:
2013-05-31

文章信息/Info

Title:
Analysis model updating of longspan continuous rigidframe bridge dynamic under environment excitation
文章编号:
16742869(2013)05001507
作者:
卢海林1; 吴玏1; 黄民水1; 徐文胜2
1．武汉工程大学环境与城市建设学院，湖北 武汉 430074；2．华中科技大学土木工程与力学学院，湖北 武汉430074
Author(s):
LU Hailin1; WU Le1; HUANG Minshui1; XU Wenshen2
1. Environment and Civil Engineering, Wuhan Institute of Technology, Wuhan 430074, China；2. Institute of Civil Engineering and mechanics, Huazhong University of Science and Technology, Wuhan 430074, China
关键词:
连续刚构桥; 环境激励; 动力分析; 模型修正
Keywords:
longspan continuous rigidframe bridge; environment excitation; dynamic analysis; model updating
分类号:
U448.23+1
DOI:
103969/jissn16742869201305004
文献标志码:
A
摘要:
为了快速准确地对黄河某特大桥进行损伤识别，采用了一种环境激励状况下，基于优化理论的有限元模型修正方法.首先通过振动测试，利用环境激励下的功率谱峰值法，获得模态参数.使用ANSYS建立桥梁的参数化有限元模型，选取灵敏度高的刚度参数，根据最优化理论进行迭代修正，最终得到了黄河某特大桥有限元修正模型.通过对有限元模型进行动力特性分析，结果表明：修正后模型的模态特征值与实测值吻合度更好，前20阶主要振型的频率误差基本在2%以下，精度较高；修正后，桥梁混凝土整体弹性模量确定在每平方毫米340 000~370 000 N之间，箱梁刚度分布基本符合现场的表观损伤调查结果.在正常通车情况下即可检测桥梁，无需交通管制，相对传统的人工激励方式，不会对桥梁构成额外伤害；利用现有的有限元软件ANSYS，不用计算繁琐的质量、刚度矩阵即可进行损伤识别，适合于大跨度连续刚构桥损伤识别的应用.
Abstract:
To identify the damages of a Huang River extralarge bridge, a updating method of finite element model which was based on optimization theory under the environment excitation, was introduced. Firstly, the power spectrum peak method under environment excitation was used to get the modal parameters through the vibration test. Next, parametric finite element model was set up in software ANSYS. According to optimization theory, the high sensitive parameter was chosen to iteratively update. In the end, the updated finite element model of longspan continuous rigidframe bridge was obtained. Through the dynamic property analysis of the finite element model, the result shows that the updated finite element modal eigenvalues preferably coincide with the measured values; after the update, frequency errors of the first 20 modes are controlled below 2%;concrete elastic modulus of the bridge is between 340 000~370 000 N per square millimeter; the apparent damage result by site investigation is conformed to box girder stiffness distribution. Bridge inspection is made under the condition of normal traffic by the method without traffic control, and doesn’t cause extra damage to the bridge compared with traditional artificial excitation. By using the software ANSYS, damage is identified without rigidity matrix and mass matrix. The method is suitable for damage identification of longspan continuous rigidframe bridge.

参考文献/References:

［1］王元清，姚南，张天申，等.基于最优化理论的多阶段模型修正及其在桥梁安全评估中的应用\[J\].工程力学，2010,27（1）:9197.WANG Yuanqing,YAO Nan,ZHANG Tianshen,et al. An application of multistage model updating based on optimization theory to the safety appraisal of bridge\[J\], Engineering Mechanics, 2010,27（1）:9197.(in Chinese)［2］陈宇．有限元模型修正技术在桥梁工程中的应用研究\[D\]. 成都：西南交通大学,2009.CHEN Yu.Research on the Application of Finite Element Model Updating Technique in Bridge Engineering\[D\].Chengdu:Southwest Jiaotong University,2009.(in Chinese)［3］刘继承，周传荣.一个基于优化的有限元模型修正方法\[J\].振动与冲击，2010，22(2):330340.Liu Jicheng,Zhou Chuanrong. FE model updating method based on optimization\[J\].Journal of Vibration and Shock, 2010，22(2):330340. (in Chinese)［4］荣见华，郑建龙，许飞鸿.结构动力修改及优化设计\[M\].北京：人民交通出版社，2011.［5］Salama M, Rose T, Garba J.Optimal placement of exciters and sensors for verification of large dyna\|mical systems\[C\]//Kedward KT. Proceedings of SDM conference,AIAA870782,1987:10241031.［6］Imamovic N.Model validation of large finite element model using test data\[D\].London: Imperial College,1998.［7］Berman A, Nagy E J. Improvement of a large analy\|tical model using test data\[J\].AIAA J,1983,21(8):11681173.［8］朱宏平，徐斌，黄玉盈.结构动力模型修正方法的比较研究及评估\[J\].力学进展，2002,32（4）：513525.Zhu Hongping, Xu Bin, Huang Yuying. Comparison and evaluation of analytical approaches to structural dynamic model correction\[J\]. Advances in Mechanics，2002,32（4）：513525.（in Chinese）［9］白宝玉，王丽荣.桥梁工程\[M\].北京：高等教育出版社，2002. ［10］邵旭东，程翔云，李立峰.桥梁设计与计算\[M\].北京:人民交通出版社，2006.

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备注/Memo

备注/Memo:
收稿日期：20130310基金项目：湖北省教育厅科学技术研究计划重点项目（No. D20111512）；武汉工程大学科学研究基金项目(No.13115085)作者简介：卢海林（1965），男，湖南安乡人，教授，博士.研究方向：土木工程结构研究与教学.第35卷第5期2013年05月武汉工程大学学报JWuhanInstTechVol35No5May2013
更新日期/Last Update: 2013-06-04