考虑桥墩强震损伤的连续梁桥半主动控制策略
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摘要
在连续梁桥的智能控制研究中,大多以控制梁的加速度和墩顶与梁间的相对位移为目的,而忽略了对桥墩损伤的控制。本文提出一种改进的半主动控制策略,通过在限界Hrovat最优半主动控制算法中引入桥墩的损伤指数,使桥梁的地震反应和桥墩的损伤同时得到控制。本文以一设置了磁流变(MR)阻尼器的两跨连续梁桥为研究对象,采用MATLAB进行数值模拟分析,对所提出的半主动控制策略进行了多种工况下的验证。计算结果表明,采用考虑损伤的半主动控制策略,能够在较好控制桥梁地震反应的同时,有效降低桥墩在强震过程中的损伤指数。
As for the intelligent control on the continuous beam bridges,most of the current study is aimed at controlling the beam acceleration as well as the relative displacement between pier top and beam,whereas,the piers damage is ignored.An improved semi-active control strategy is proposed for this problem.In this method,the piers damage parameter is introduced into the algorithm of limiting Hrovat optimal semi-active control,so as to control the seismic responses of bridges and the piers' damage at the same time.A two-span continuous beam bridge equipped with magnetorheological(MR) dampers is numerically studied with MATLAB and several scenarios are simulated to validate the proposed semi-active control strategy.The results indicate that this method is well capable of controlling the seismic responses and reducing the damage index of the pier simultaneously.
As for the intelligent control on the continuous beam bridges,most of the current study is aimed at controlling the beam acceleration as well as the relative displacement between pier top and beam,whereas,the piers damage is ignored.An improved semi-active control strategy is proposed for this problem.In this method,the piers damage parameter is introduced into the algorithm of limiting Hrovat optimal semi-active control,so as to control the seismic responses of bridges and the piers' damage at the same time.A two-span continuous beam bridge equipped with magnetorheological(MR) dampers is numerically studied with MATLAB and several scenarios are simulated to validate the proposed semi-active control strategy.The results indicate that this method is well capable of controlling the seismic responses and reducing the damage index of the pier simultaneously.
引文
[1]林伟,李忠献,倪一清.基于信赖域方法的MR阻尼器瞬时最优半主动控制[J].工程力学,2009,26(9):36-42.LIN Wei,LI Zhongxian,NI Yiqing.Experiment study of trust-region method based instantaneous optimal semi-active control for MR dampers[J].Journal of Vibration Engineering,2009,26(9):36-42.(in Chinese)
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[4]汪志昊,陈政清.基于磁流变阻尼器的隔震高架桥Skyhook控制[J].振动与冲击,2010,29(12):196-199.WANG Zhihao,CHEN Zhengqing.Skyhook control of isolated elevated highway bridge based on magnetorheological(MR)damper[J].Journal ofVibration and Shock,2010,29(12):196-199.(in Chinese)
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[8]Park Y J,Ang AH.Mechanistic seismic damage model for reinforced concrete[J].Journal OF Structural Engineering,1985,111(4):740-757.
[9]欧进萍,何政,吴斌,等.钢筋混凝土结构基于地震损伤性能的设计[J].地震工程与工程振动,1999,19(1):21-30.OU Jinping,HE Zheng,WU Bin,et al.Seismic damage performance-based design of reinforced concrete structures[J].Journal of EarthquakeEngineering and Engineering Vibration,1999,19(1):21-30.(in Chinese)
[10]欧进萍.结构振动控制-主动、半主动和智能控制[M].北京:科学出版社,2003.OU Jinping.Structural vibration control-active,semi-active and intelligent control[M].Beijing:Science Press,2003.(in Chinese)
[11]亓兴军,李小军.桥梁减震半主动控制算法比较与分析[J].振动与冲击,2006,25(6):71-75.QI Xingjun,LI Xiaojun.Comparison and analysis of the algorithm of Bridge seismic semi-active control[J].Journal of Vibration and Shock,2006,25(6):71-75.(in Chinese)
[12]丁阳,张路,姚宇飞,等.MR-J型磁流变阻尼器性能测试与阻尼力预估模型[J].天津大学学报,2009,42(9):763-769.DING Yang,ZHANG Lu,YAO Yufei,et al.Performance test and prediction model of damping force of MR-J dampers[J].Journal of TianjinUniversity,2009,42(9):763-769.(in Chinese)
[2]Spencer Jr BF,Nagarajaiah S.State of the art of structural control[J].Journal of Structural Engineering,ASCE,2003,129(7):845-856.
[3]李忠献,岳福青,周莉.城市隔震高架桥梁地震反应的半主动控制[J].土木工程学报,2007,40(1):42-48.LI Zhongxian,YUE Fuqing,ZHOU Li.Semi-active control on seismic responses of vibration-insulated urban elevated bridges[J].China Civil En-gineering Journal,2007,40(1):42-48.(in Chinese)
[4]汪志昊,陈政清.基于磁流变阻尼器的隔震高架桥Skyhook控制[J].振动与冲击,2010,29(12):196-199.WANG Zhihao,CHEN Zhengqing.Skyhook control of isolated elevated highway bridge based on magnetorheological(MR)damper[J].Journal ofVibration and Shock,2010,29(12):196-199.(in Chinese)
[5]Baris Erkus,Masato Abe and Yozo Fujino.Investigation of semi-active control for seismic protection of elevated highway bridges[J].EngineeringStructures,2002(24):281-293.
[6]范立础.桥梁抗震[M].上海:同济大学出版社,1997.FAN Lichu.Seismic design of bridges[M].Shanghai:Tongji University Press,1997.(in Chinese)
[7]陈水生.高架桥梁地震响应磁流变阻尼器(MR)半主动控制[J].长安大学学报:自然科学版,2003,23(6):40-43.CHEN Shuisheng.Magneto-rheological(M R)dampers semi-active control of earthquake response for elevated bridge[J].Journal of Chang an Uni-versity(Natural Science Edition),2003,23(6):40-43.(in Chinese)
[8]Park Y J,Ang AH.Mechanistic seismic damage model for reinforced concrete[J].Journal OF Structural Engineering,1985,111(4):740-757.
[9]欧进萍,何政,吴斌,等.钢筋混凝土结构基于地震损伤性能的设计[J].地震工程与工程振动,1999,19(1):21-30.OU Jinping,HE Zheng,WU Bin,et al.Seismic damage performance-based design of reinforced concrete structures[J].Journal of EarthquakeEngineering and Engineering Vibration,1999,19(1):21-30.(in Chinese)
[10]欧进萍.结构振动控制-主动、半主动和智能控制[M].北京:科学出版社,2003.OU Jinping.Structural vibration control-active,semi-active and intelligent control[M].Beijing:Science Press,2003.(in Chinese)
[11]亓兴军,李小军.桥梁减震半主动控制算法比较与分析[J].振动与冲击,2006,25(6):71-75.QI Xingjun,LI Xiaojun.Comparison and analysis of the algorithm of Bridge seismic semi-active control[J].Journal of Vibration and Shock,2006,25(6):71-75.(in Chinese)
[12]丁阳,张路,姚宇飞,等.MR-J型磁流变阻尼器性能测试与阻尼力预估模型[J].天津大学学报,2009,42(9):763-769.DING Yang,ZHANG Lu,YAO Yufei,et al.Performance test and prediction model of damping force of MR-J dampers[J].Journal of TianjinUniversity,2009,42(9):763-769.(in Chinese)
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