钢筋混凝土框架结构参数时变特性的研究
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摘要
以某12层钢筋混凝土标准框架结构振动台模型试验的数据为基础,用卡尔曼滤波技术与移动谱相结合的方法对该标准框架结构参数的时变特性进行研究,该方法相当于对时域信号施加变长度矩形窗后进行卡尔曼滤波,有效地提高了参数识别精度。模型结构在小震激励时,结构的频率发生微小程度的降低,表明结构内部发生了未表现出来的轻微损伤;大震激励时,结构频率较初始时刻发生大幅度的下降,表明结构发生了较大程度的破坏。经与理论解和分量分析识别结果对比,用本文方法识别出的结构参数更接近理论解。
Based on the shaking table model test data of a 12-story RC-frame structure,the time-varying characteristics of standard frame structural parameters are researched in this paper by using the combination of Kalman filter and mobile spectrum.The results are precise.It is found that the frequency gets a very slight reduction when the model structure is under the excitation of small earthquakes.This indicaties that tiny damage which is not founded is located in the structure.The frequency of the structure is greatly reduced compared to that at the initial moment under the large earthquake excitation.It is shown that there is severe damage in the structure.By the comparison with component analysis and theoretical solution,the recognition results by using the proposed method is closer to the theoretical solution.
Based on the shaking table model test data of a 12-story RC-frame structure,the time-varying characteristics of standard frame structural parameters are researched in this paper by using the combination of Kalman filter and mobile spectrum.The results are precise.It is found that the frequency gets a very slight reduction when the model structure is under the excitation of small earthquakes.This indicaties that tiny damage which is not founded is located in the structure.The frequency of the structure is greatly reduced compared to that at the initial moment under the large earthquake excitation.It is shown that there is severe damage in the structure.By the comparison with component analysis and theoretical solution,the recognition results by using the proposed method is closer to the theoretical solution.
引文
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[12]大崎顺彦(日).地震动的谱分析入门[M].北京:地震出版社,1980.SAKI Malic Yan.Spectrum introduction of ground motion[M].Beijing:Earthquake Publishing House,1980.(in Chinese)
[13]Pei Qiang,Guan Ping,Tian Jing,et al.Preliminary study of the unsteady response spectrum based on time-varying[J].Advanced Materials Re-search,September,2011,346:58-62.
[14]田静.基于非定常反应谱的强震记录分析及结构破坏机理研究[D].大连:大连大学,2011:29-56.TIAN Jing.Study on structural failure mechanism and strong earthquake records based on the time-varying response spectrum analysis[D].Dalian:Dalian University,2011:29-56.(in Chinese)
[15]公茂盛,鹿嶋俊英,谢礼立.基于结构强震记录的结构时变模态参数识别[J].振动与冲击,2010,29(5):171-175.GONG Maosheng,LU Xijunying,XIE Lili.Time-varying modal parameter identification based on the structure of the structure of strong motionrecords[J].Journal of Vibration and Shock,2010,29(5):171-175.(in Chinese)
[2]李德葆,陆秋海.实验模态分析及其应用[M].北京:科学出版社,2001.LI Debao,LU Qiuhai.Experimental modal analysis and applications[M].Beijing:Science Press,2001.(in Chinese)
[3]公茂盛,谢礼立,连海宁,等.基于HHT的结构强震记录分析研究[J].地震工程与工程振动,2007,27(6):24-29.GONG Maosheng,XIE Lili,LIAN Haining,et al.Study on analysis of structural strong motion records on HHT[J].Earthquake Engineering andEngineering Vibration,2007,27(6):24-29.(in Chinese)
[4]胡孔国,陈小兵,岳清瑞.随机地震动模拟的时间序列法及其工程应用[J].世界地震工程,2003,19(1):141-153.HU Kongguo,CHEN Xiaobing YUE Qingrui.Time sequence method of simulating earthquake wave and its applications[J].World EarthquakeEngineering,2003,19(1):141-153.(in Chinese)
[5]Kalman,R.E.A new Approach to Linear Filtering and Predication Problem[J].Transaction of the ASME-Journal of Basic Engineering,1960(4):35-45
[6]尚久铨.卡尔曼滤波法在结构动态参数估计中的应用[J].地震工程与工程振动,1991,11(2):62-72.SHANG Jiuquan.Application of Kalman filter method to dynamic parameter estimation of structures[J].Earthquake Engineering and EngineeringVibration,1991,11(2):62-72.(in Chinese)
[7]杜飞平,谭永华,陈建华.基于改进广义卡尔曼滤波的结构损伤识别方法[J].地震工程与工程振动,2010,30(4):109-114.DU Feiping TAN Yonghua,CHEN Jianhua.Structural damage identification methods based on improved generalized Kalman filter[J].EarthquakeEngineering and Engineering Vibration,2010,30(4):109-114.(in Chinese).
[8]王济,胡晓.MATLAB在振动信号处理中的应用[M].中国水利水电出版社,2005.WANG Ji,HU Xiao.Random signal processing in MATLAB[M].China WaterPower Press,2005.(in Chinese)
[9]吕西林,李培振,陈跃庆.12层钢筋混凝土标准框架振动台模型试验的完整数据[R].上海:同济大学土木工程防灾国家重点实验室振动台试验室,2004.LU Xilin,LI Peizhen,CHEN Yueqing.Benchmark test of a 12-story reinforced concrete frame model on shaking table[R].State Key Laboratoryof Disaster Reduction in Civil Engineering,Tongji University,2004.(in Chinese)
[10]李臣,马爱军,冯雪梅.一种高效的频域模态参数识别法[J].振动与冲击,2004,23(3):128-131.LI Chen,MA Aijun,FENG Xuemei.An efficient frequency domain modal parameter identification method[J].Journal of Vibration and Shock,2004,23(3):128-131.(in Chinese)
[11]王明礼,马建珍,薛申芳.广义卡尔曼滤波中状态预报值算法[J].计算机仿真,2007,24(6):96-101.WANG Mingli,MA Jianzhen,XUE Shenfang.A predicted value algorithm in extended Kalman filtering[J].Computer Simulation,2007,24(6):96-101.(in Chinese)
[12]大崎顺彦(日).地震动的谱分析入门[M].北京:地震出版社,1980.SAKI Malic Yan.Spectrum introduction of ground motion[M].Beijing:Earthquake Publishing House,1980.(in Chinese)
[13]Pei Qiang,Guan Ping,Tian Jing,et al.Preliminary study of the unsteady response spectrum based on time-varying[J].Advanced Materials Re-search,September,2011,346:58-62.
[14]田静.基于非定常反应谱的强震记录分析及结构破坏机理研究[D].大连:大连大学,2011:29-56.TIAN Jing.Study on structural failure mechanism and strong earthquake records based on the time-varying response spectrum analysis[D].Dalian:Dalian University,2011:29-56.(in Chinese)
[15]公茂盛,鹿嶋俊英,谢礼立.基于结构强震记录的结构时变模态参数识别[J].振动与冲击,2010,29(5):171-175.GONG Maosheng,LU Xijunying,XIE Lili.Time-varying modal parameter identification based on the structure of the structure of strong motionrecords[J].Journal of Vibration and Shock,2010,29(5):171-175.(in Chinese)
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