一种动静结合的框架结构损伤识别方法
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摘要
为了改进对框架结构损伤的识别效果,在动态和静态损伤识别指标的基础之上,提出了将动态一阶应变差与静态单元相关系数相乘的动静相结合的损伤识别新指标。新指标具有动态法和静态法的优点,一定程度上对动态识别效果与静态识别效果进行叠加,较单独使用动态指标和静态指标更准确、更具优势。对一个4层框架结构的单处损伤和多处损伤进行了数值模拟,并分别使用动态、静态和动静结合的3种指标进行了损伤识别效果的比较,验证了新指标更具优越性。
In order to improve damage identification of frame structure,a new structural nondestructive identification indictor,a dynamic and static combining indictor was presented,which is based on dynamic indictor and static indictor.The new indictor has advantages of methods of dynamic and static.In a sense,the advantages of dynamic indictor and static indictor are superposed in new indictor.It is much exact than only used dynamic and static indictor for damage idenlification.Then its availability was verified through a typical four-story frame structure numerical simulation,and by compared with only used dynamic and static idenlification indictors.The result shows that new indictor is preponderant.
In order to improve damage identification of frame structure,a new structural nondestructive identification indictor,a dynamic and static combining indictor was presented,which is based on dynamic indictor and static indictor.The new indictor has advantages of methods of dynamic and static.In a sense,the advantages of dynamic indictor and static indictor are superposed in new indictor.It is much exact than only used dynamic and static indictor for damage idenlification.Then its availability was verified through a typical four-story frame structure numerical simulation,and by compared with only used dynamic and static idenlification indictors.The result shows that new indictor is preponderant.
引文
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[7]李国东,郭迅,陈晗.用于结构健康诊断的动静结合法及其试验验证[J].世界地震工程,2009,25(4):59-63.LI Guodong,GUO Xun,CHEN Han.Dynamic and static combining method(DSCM)for structural damages detection and its verification[J].World Earthouake Engneering,2009,25(4):59-63.
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[9]杜永峰,邵云飞.基于应变模态的桁架结构损伤指标研究[J].甘肃科学学报,2007,19(3):127-130DU Yongfeng,SHAO Yunfei.Study on Damage Index of Truss Structure Based on Strain Modal[J].Journal of Gansu Sciences,2007,19(3):127-130.
[2]李林.剪切型框架结构损伤检测的数值与试验研究[D].武汉:华中科技大学,2005.Li Lin.Numerical and Experimental Studies of Damage Detection for Shearing Buildings[D].Wuhan:Huazhong University of Science and Technol-ogy,2005.
[3]周先雁,沈蒲生.用应变模态对混凝土结构进行损伤识别的研究[J].湖南大学学报,1997,24(5):69-74.Zhou Xianyan,Shen Pu sheng.Study of Damage Assessment of Concrete Structures by Strain Model Method[J].Journal of Hunan University,1997,24(5):69-74.
[4]崔飞,袁万城,史家钧.基于静态应变及位移模态测量的结构损伤识别方法[J].同济大学学报,2000,28(1):5-8.CUI Fei,YUAN Wancheng,SHI Jiajun.Damage Detection of Structures Based on Static Response[J].Journal of Tongji University,2000,28(1):5-8.
[5]Wang X,Hu N,Hisao Fukunaga,et al.Structural damage identification using static test data and changes in frequencies[J].Structural Engineering,2001(23):610-623.
[6]Hajela P,Soeiro F J.Structural damage detection based on static and modal analysis[J].AIAA Journal,1989,28(6):1110-1115.
[7]李国东,郭迅,陈晗.用于结构健康诊断的动静结合法及其试验验证[J].世界地震工程,2009,25(4):59-63.LI Guodong,GUO Xun,CHEN Han.Dynamic and static combining method(DSCM)for structural damages detection and its verification[J].World Earthouake Engneering,2009,25(4):59-63.
[8]Yao G C,Chang K C,Lee G C.Damage diagnosis of steel frames using vibration signature analysis[J].Journal of Engineering Mechanics,ASCE,1992,118(9):1949-1961.
[9]杜永峰,邵云飞.基于应变模态的桁架结构损伤指标研究[J].甘肃科学学报,2007,19(3):127-130DU Yongfeng,SHAO Yunfei.Study on Damage Index of Truss Structure Based on Strain Modal[J].Journal of Gansu Sciences,2007,19(3):127-130.
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