[1]李兆霞,孙正华,郭力,等.结构损伤一致多尺度模拟和分析方法[J].东南大学学报(自然科学版),2007,37(2):251-260.[doi:10.3969/j.issn.1001-0505.2007.02.014]
 Li Zhaoxia,Sun Zhenghua,Guo Li,et al.Concurrent multi-scale modeling of structures and damage analyses[J].Journal of Southeast University (Natural Science Edition),2007,37(2):251-260.[doi:10.3969/j.issn.1001-0505.2007.02.014]
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结构损伤一致多尺度模拟和分析方法()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
37
期数:
2007年第2期
页码:
251-260
栏目:
数学、物理学、力学
出版日期:
2007-03-20

文章信息/Info

Title:
Concurrent multi-scale modeling of structures and damage analyses
作者:
李兆霞1 孙正华1 郭力1 陈鸿天2 余洋2
1 东南大学土木工程学院, 南京 210096; 2 香港理工大学土木及结构工程系, 香港
Author(s):
Li Zhaoxia1 Sun Zhenghua1 Guo Li1 Chan Hongtian2 Yu Yang2
1 School of Civil Engineering, Southeast University, Nanjing 210096,China
2 Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, China
关键词:
大跨结构 健康状态评估 一致多尺度模拟 模型修正 损伤分析
Keywords:
long-span structures health assessment concurrent multi-scale modeling model updating damage analyses
分类号:
O346.5
DOI:
10.3969/j.issn.1001-0505.2007.02.014
摘要:
以一个重要的大跨桥梁为工程背景,基于非线性有限元分析软件ABAQUS,研究了大跨结构以损伤分析和状态评估为目标的结构多尺度模拟中的一系列关键理论和技术问题,包括多尺度建模方法和策略、基于子结构方法和基于多点约束衔接方法的多尺度建模过程,结构一致多尺度模型的修正和验证,以及应用多尺度模型进行结构损伤分析的方法与策略.研究结果表明,应用所提出的大跨结构一致多尺度建模方法和策略,能够有效地建立适用于实际大跨桥梁结构损伤分析的多尺度有限元模型,满足不同尺度下结构特性分析和局部损伤演化过程仿真计算的需要.而基于多尺度模型进行的局部疲劳损伤累积的仿真分析结果表明,发生于局部焊接细节的疲劳损伤与结构的局部应力响应之间有较大的耦合作用,在结构的多尺度损伤分析过程中应予考虑才能得到比较准确的寿命评估结果.
Abstract:
The methodology and strategy for concurrent multi-scale modeling of large structures such as long span bridges were studied in order to perform the multi-scale numerical analysis on structural dynamic response and local damage. The multi-scale FE(finite element)modeling was first studied by using substructure method and the multi-point constraints. A multi-scale model of the Tsing Ma Bridge(TMB)was then developed by using the design drawings and the proposed strategy on the basis of the software ABAQUS and the developed programs via the user interface. The model updating and verification were carried out based on the online data from the structural health monitoring system installed on the TMB. The procedure for damage analysis using the developed model was proposed, in which locally deteriorating process at welded details of interconnects is able to account for the major effect of the damage and nonlinear influence on structural response. The calculated result shows that damage features can be successfully performed via multi-scale modeling and analysis; and fatigue damage accumulation on the weld details shows significantly local effect. The fatigue life obtained from the fully coupled calculation on stress and damage is shorter than that from the uncouple computation, which suggests that the significant interaction between the damage and the structural response should be considered in the structural damage analyses using the multi-scale numerical analysis.

参考文献/References:

[1] Wong K Y,Chan W Y K,Man K L,et al.The use of structural health monitoring system in operation & maintenance of cable-supported bridges [C] //Highway and Railway Structures.Hong Kong,2000:108-133.
[2] Bergmeister K,Santa U.Global monitoring concepts for bridges [C] //Proceedings of SPIE.Newport Beach,USA,2000:14-25.
[3] Aktan A E,Grimmelsman K A,Helmicki A J.Issues and opportunities in bridge health monitoring [C] //Proceedings of the Second World Conference on Structural Control.Kyoto,Japan,1998:2359-2368.
[4] Dewolf J T,Lindsay T R,Culmo M P.Fatigue evaluations in steel bridges using field monitoring equipment [C] //Proceedings of the 1997 15th Structural Congress.Portland,USA,1997:26-30.
[5] Chong K P.NSF research in mechanics,computational & other areas [C] //Proc of Int Conf on Fracture Mechanics and Application.Shanghai,China,2005:323-332.
[6] Savaidis G,Vormwald M.Hot-spot stress evaluation of fatigue in welded structural connections supported by finite element analysis [J].International Journal of Fatigue,2000,22(2):85-91.
[7] Michopoulos J G,Farhat C,Fish J.Modeling and simulation of multi-physics systems [J].J of Computing and Information Science in Engineering,2005,5(2):198-213.
[8] 孙正华.大跨钢桥梁考虑局部细节特性的结构多尺度模拟及其应用[D].南京:东南大学土木工程学院,2006.
[9] HKS Inc.ABAQUS/standard user’s manual ver.6.3 [M].Pawpucket:Hibibit,Karlsson & Sorensen Inc,2002.
[10] Wang J Y,Ko J M,Ni Y Q.Modal sensitivity analysis of Tsing Ma Bridge for structural damage detection [C] //SPIE 5th Int Symposium on Nondestructive Evaluation and Health Monitoring of Aging Infrastructure.Newport Beach,USA,2000,3995:300-311.
[11] Ni Y Q,Wang J Y,Ko J M.Simulation studies of damage location in Tsing Ma Bridge deck [C] //Proceedings of the SPIE.Newport Beach,USA,2000,3995:312-323.
[12] Chan T H T,Guo L,Li Z X.Finite element modeling for fatigue stress analysis of large suspension bridges [J].Journal of Sound and Vibration,2003,261(3):443-464.
[13] 郭力.面向结构状态评估的大跨桥梁有限元模拟及其应用[D].南京:东南大学土木工程学院,2005.
[14] Li Z X,Chan T H T,Ko J M.Fatigue damage model for bridge under traffic loading application made to the Tsing Ma Bridge [J]. Theoretical and Applied Fracture Mechanics,2001,35(1):81-91.
[15] 周太全.桥梁构件局部热点应力分析及其疲劳损伤累积过程模拟 [D].南京:东南大学土木工程学院,2003.

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备注/Memo

备注/Memo:
基金项目: 国家自然科学基金资助项目(10672038)、教育部高等院校博士学科点专项科研基金资助项目(20040286031)、香港政府研资局(RGC)资助项目(PolyU 5042/01E,PolyU 5134/03E).
作者简介: 李兆霞(1957—),女,博士,教授, zhxli@seu.edu.cn.
更新日期/Last Update: 2007-03-20