基于ERA算法的结构损伤识别及试验研究
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摘要
针对多孔砖砌体结构,分别进行了理论计算、有限元分析及其基于特征值实现法(ERA)的模态实验分析,通过对比表明3种方法分析的结果较为吻合,说明了识别的结果的正确性。根据识别出的频率,得出了损伤前后的变化规律,说明随着墙体的开裂,刚度迅速下降,极限荷载以后刚度衰减趋于平缓,表明损伤识别分析结果与多孔砖砌体压剪实验结果一致。
In this paper,theoretical calculation,finite element analysis and modal analysis are carried out based on ERA for the masonry structure of the perforated block.The comparisons show that the analysis result of three methods is highly consistent,and the identification result is cerrect.According to the identification frequency,the rule of the stiffness changing fore and after structural damage is obtained by calculating and analyzing,and it indicates that the stiffness decreases rapidly following with the wall's crack,the stiffness degradation becomes flat after ultimate loaded,and the analysis results of damage identification are in good agreement with experimental results.
In this paper,theoretical calculation,finite element analysis and modal analysis are carried out based on ERA for the masonry structure of the perforated block.The comparisons show that the analysis result of three methods is highly consistent,and the identification result is cerrect.According to the identification frequency,the rule of the stiffness changing fore and after structural damage is obtained by calculating and analyzing,and it indicates that the stiffness decreases rapidly following with the wall's crack,the stiffness degradation becomes flat after ultimate loaded,and the analysis results of damage identification are in good agreement with experimental results.
引文
[1]何肇弘,胡士耀.既有建筑物质量检测与可靠性评定[M].北京:中国铁道出版社,1992He Zhao-hong,Hu Shi-yao.Reliability evaluation andquality detection for the exiting building[M].China RailwayPublishing House,1992(in Chinese)
[2]朱镜清.一个修正的单纯形法及其在结构识别中的应用[J].地震工程与工程振动,1985,5(3)Zhu Jing-qing.A modified simplex method and itsapplication to structural identification[J].EarthquakeEngineering and Engineering Vibration,1985,5(3)(inChinese)
[3]杜永峰,邵云飞.应变模态在桁架结构损伤识别中的应用[J].防灾减灾工程学报,2007,27,186~189Du Yong-feng,Shao Yun-fei.Applicaton of strain mode todamage identification of truss structure[J].Joural ofDisaster Prevention and Mitigation Engineering,2007,27,186~189(in Chinese)
[4]李慧,王红丽,杜永峰.钢框架连接损伤的两种改进BP算法的比较[J].工程抗震与加固改造,2006,28(2):39~42Li Hui,Wang Hong-li,Du Yong-feng.Comparativeanalysis of two kinds of improved BP algorithm used forstructural[J].Earthquake Resistant Engineering andRetrofitting,2006,28(2):39~42(in Chinese)
[5]仲伟秋,逢世川,李红.评定砌体结构质量的振动模态检测方法[J].力学与实践2003,25(2):57~58Zhong Wei-qiu,Feng Shi-chuan,Li Hong.A modal testmethod for quality evaluation of masonry structures[J].Mechanics in Engineering,2003,25(2):57~58(inChinese)
[6]刘桂秋.砌体结构基本受力性能研究[D].长沙:湖南大学,2005Liu Gui-qiu.The research on the basic mechanical behaviorof masonry structure[D].Changsha:Hunan University,2005(in Chinese)
[7]Juang J N,Pappa R S.特征系统算法在模态识别和模态修正中的应用[J].动力学制导控制学报,1985,8(5):620~627Juang J N,Pappa R S.An Eigensystem RealizationAlgorithm(ERA)for Modal Parameter Identification andModel Reduction[J].Journal of Guidance,Control,andDynamics,1985,8(5):620~627(in Chinese)
[8]史庆轩,易文宗.多孔砖砌体墙片的抗震性能试验研究及抗倒塌能力析[J].西安建筑科技大学学报,2000,32(3):271~275Shi Qing-xuan,Yi Wen-zhong.Tentative studies on theaseismic behavior and investigation of collapse resistantcapacity of porous masonry walls[J].J.Xi an Univ.ofArch.&Tech,2000,32(3):271~275(in Chinese)
[2]朱镜清.一个修正的单纯形法及其在结构识别中的应用[J].地震工程与工程振动,1985,5(3)Zhu Jing-qing.A modified simplex method and itsapplication to structural identification[J].EarthquakeEngineering and Engineering Vibration,1985,5(3)(inChinese)
[3]杜永峰,邵云飞.应变模态在桁架结构损伤识别中的应用[J].防灾减灾工程学报,2007,27,186~189Du Yong-feng,Shao Yun-fei.Applicaton of strain mode todamage identification of truss structure[J].Joural ofDisaster Prevention and Mitigation Engineering,2007,27,186~189(in Chinese)
[4]李慧,王红丽,杜永峰.钢框架连接损伤的两种改进BP算法的比较[J].工程抗震与加固改造,2006,28(2):39~42Li Hui,Wang Hong-li,Du Yong-feng.Comparativeanalysis of two kinds of improved BP algorithm used forstructural[J].Earthquake Resistant Engineering andRetrofitting,2006,28(2):39~42(in Chinese)
[5]仲伟秋,逢世川,李红.评定砌体结构质量的振动模态检测方法[J].力学与实践2003,25(2):57~58Zhong Wei-qiu,Feng Shi-chuan,Li Hong.A modal testmethod for quality evaluation of masonry structures[J].Mechanics in Engineering,2003,25(2):57~58(inChinese)
[6]刘桂秋.砌体结构基本受力性能研究[D].长沙:湖南大学,2005Liu Gui-qiu.The research on the basic mechanical behaviorof masonry structure[D].Changsha:Hunan University,2005(in Chinese)
[7]Juang J N,Pappa R S.特征系统算法在模态识别和模态修正中的应用[J].动力学制导控制学报,1985,8(5):620~627Juang J N,Pappa R S.An Eigensystem RealizationAlgorithm(ERA)for Modal Parameter Identification andModel Reduction[J].Journal of Guidance,Control,andDynamics,1985,8(5):620~627(in Chinese)
[8]史庆轩,易文宗.多孔砖砌体墙片的抗震性能试验研究及抗倒塌能力析[J].西安建筑科技大学学报,2000,32(3):271~275Shi Qing-xuan,Yi Wen-zhong.Tentative studies on theaseismic behavior and investigation of collapse resistantcapacity of porous masonry walls[J].J.Xi an Univ.ofArch.&Tech,2000,32(3):271~275(in Chinese)
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