基于改进直接刚度法的加州某桥梁结构损伤评估研究
摘要
利用OpenSees有限元软件对美国加州地区的Truckee-I80/Truckee River Bridge(TRB)桥梁结构进行了数值模拟。然后应用改进的直接刚度法对该模型进行了有无测量误差下的单处、多处损伤评估;同时对该桥进行了相应的推覆分析以及地震动输入下的非线性损伤评估。评估结果表明:改进的直接刚度法对以弯曲变形为主的桥梁结构的损伤评估是有效和可行的。
The numerical simulations for the Truckee-I80/Truckee River Bridge Structure,California in USA,were conducted in different damage scenarios in platform of OpenSees.In this study,the damage status of the model was evaluated by using the improved direct stiffness method with consideration of single and multiple damaged locations under measurement errors or not,push-over analysis,and seismic damage evaluation.The results show that the improved direct stiffness method is valid and efficient for damage detection in bending-type bridge structures.
The numerical simulations for the Truckee-I80/Truckee River Bridge Structure,California in USA,were conducted in different damage scenarios in platform of OpenSees.In this study,the damage status of the model was evaluated by using the improved direct stiffness method with consideration of single and multiple damaged locations under measurement errors or not,push-over analysis,and seismic damage evaluation.The results show that the improved direct stiffness method is valid and efficient for damage detection in bending-type bridge structures.
引文
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[2]Kim S,Pakzad S,Culler D,Demmel J,Fenves G,GlaserS,Turon M.Structural health monitoring of the goldengate bridge[R].http://www.eecs.berkeley.edu/~binetude/ggb/,2008.
[3]Huth O,Feltrin G,Maeck J,Kilic N,Motavalli M.Damage identification using modal data:Experiences ona prestressed concrete bridge[J].Journal of StructuralEngineering,2005,131(12):1898―1910.
[4]李永梅,周锡元,高向芋.基于柔度差曲率矩阵的结构损伤识别法[J].工程力学,2009,26(2):188―195,202.Li Yongmei,Zhou Xiyuan,Gao Xiangyu.Detectionindictor of structural nondestructive damage based oncurvature-flexibility-difference matrix[J].EngineeringMechanics,2009,26(2):188―195,202.(in Chinese)
[5]王利恒,周锡元,阎维明,涂鸣.无粘结预应力钢筋混凝土梁非线性动力特性试验研究[J].建筑结构,2008,38(10):68―72.Wang Liheng,Zhou Xiyuan,Yan Weiming,Tu Ming,Study on nonlinear dynamic characteristics of unbondedprestressed reinforced concrete beam[J].BuildingStructure,2008,38(10):68―72.(in Chinese)
[6]Maeck J.Damage assessment of civil engineeringstructure by vibration monitoring[D].Belgium:K ULeuven,Department of Civil Engineering,2003.
[7]阳洋,周锡元,金国芳,刘荷.连续梁结构损伤识别的改进直接刚度方法[J].工程力学,2010,27(7):82―91.Yang Yang,Zhou Xiyuan,Jin Guofang,Liu He,Modified direct stiffness method for the damagedetection of continuous beam-type structures[J].Engineering Mechanics,2010,27(7):82―91.(inChinese)
[8]阳洋,周锡元,金国芳,刘荷.框架结构基于改进直接刚度法的地震损伤评估[J].振动与冲击,2011,30(2):199―204.Yang Yang,Zhou Xiyuan,Jin Guofang,Liu He.Modified direct stiffness calculation method for seismicdamage assessment of frame structures[J].Journal ofVibration and Shock,2011,30(2):199―204.(inChinese)
[9]阳洋,金国芳,周锡元,刘荷.框架结构基于改进直接刚度法的地震累积损伤评估[J].四川大学学报(工程科学版),2011,43(1):43―50.Yang Yang,Jin Guofang,Zhou Xiyuan,Liu He.Cumulative seismic damage evaluation of reinforcedconcrete frame model based on improved direct stiffnessmethod[J].Journal of Sichuan University(EngineeringScience Edition),2011,43(1):43―50.(in Chinese)
[10]阳洋,周锡元,金国芳.OpenSees系统识别工具箱原理及应用[J].四川建筑科学研究,2011,37(1):7―10.Yang Yang,Zhou Xiyuan,Jin Guofang.Thedevelopment and application of system identificationtoolbox using OpenSees[J].Sichuan Institute ofBuilding Research,2011,37(1):7―10.(in Chinese)
[11]王利恒.基于线形及非线性动力特性的桥梁结构非破损检测研究[D].北京:北京工业大学,2006:248―257.Wang Liheng.Studies on non-destructive damagedetection of bridges based on linear and nonlineardynamic characteristic[D].Beijing:Beijing Universityof Technology,2006:248―257.(in Chinese)
[12]Mazzoni S,McKenna F,Scott M H,Fenves G L.Opensystem for earthquake engineering simulation,usercommand-language manual:Version 2.2.0[P].PacificEarthquake Engineering Center,University of Californiaat Berkeley,http://opensees.berkeley.edu,2009.
[13]郭国会.桥梁结构动力损伤诊断方法研究[D].长沙:湖南大学,2001:53―54.Guo Guohui.Research on damage diagnosis of bridgestructures based on the vibration parameters[D].Changsha:Hunan University,2001:53―54.(in Chinese)
[14]Hassiotis S,Jeong G D.Assessment of structural damagefrom natural frequency measurement[J].Computers andStructures,1993,49(4):679―691.
[15]Aviram A,Mackie K R,Bozidar S.Guidelines fornonlinear analysis of bridge structures in California[R].Technical Report UCB/EERC 2008-03,University ofCalifornia,Berkeley,2008.
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