基于MRD与LRB混合控制的隔震连续梁桥地震响应
|
摘要
为了研究磁流变阻尼器(MRD)与铅芯橡胶支座(LRB)混合控制对桥梁结构地震响应及隔震效果的影响,以典型三跨连续梁桥为背景,采用平行板模型模拟MRD的本构关系,采用Bouc-Wen模型模拟LRB的力-位移非线性行为,通过对结构的离散建立无控制、LRB单独控制、MRD与LRB混合控制的多种控制工况有限元计算模型,运用有限单元方法建立系统的动力特性矩阵,并采用瞬时最优控制算法对其进行了非线性时程对比分析.分析结果表明:采用MRD与LRB混合控制工况与LRB单独控制工况相比,前者的结构地震响应明显降低,隔震效果得到明显提高;在桥墩、桥台处均安装MRD与仅在桥墩或桥台处安装MRD的LRB隔震桥梁相比,前者对结构地震响应的控制效果更好.
To investigate the seismic response and isolated effect of bridges influenced by hybrid control of MRD(magneto rheological damper) and LRB(lead rubber bearing),in the background of three spans isolated continuous girder bridges,parallel-plate model was adopted to simulate the constitutive relation for MRD,Bouc-Wen restoring force model was adopted to simulate the nonlinear hysteric characteristics for LRB,various control condition finite element analytic model considering no control,separate control of LRB and hybrid control of MRD and LRB were established by making the structure discrete,and system property matrix was obtained by using the FEM,using the IOC and combining various control condition to make the contrast analysis.The consequences indicate that hybrid control of MRD and LRB is significantly lower on the seismic responses than separate control of LRB,and isolated effect in hybrid control of MRD and LRB get obvious improvement compared with separate control of LRB;The control effect of LRB isolated bridges structure seismic responses of the MRD is installed at the piers and abutments are much better than those of the MRD installed at the piers or abutments.
To investigate the seismic response and isolated effect of bridges influenced by hybrid control of MRD(magneto rheological damper) and LRB(lead rubber bearing),in the background of three spans isolated continuous girder bridges,parallel-plate model was adopted to simulate the constitutive relation for MRD,Bouc-Wen restoring force model was adopted to simulate the nonlinear hysteric characteristics for LRB,various control condition finite element analytic model considering no control,separate control of LRB and hybrid control of MRD and LRB were established by making the structure discrete,and system property matrix was obtained by using the FEM,using the IOC and combining various control condition to make the contrast analysis.The consequences indicate that hybrid control of MRD and LRB is significantly lower on the seismic responses than separate control of LRB,and isolated effect in hybrid control of MRD and LRB get obvious improvement compared with separate control of LRB;The control effect of LRB isolated bridges structure seismic responses of the MRD is installed at the piers and abutments are much better than those of the MRD installed at the piers or abutments.
引文
[1]杜修力,韩强,刘文光.考虑双向耦合非线性的LRB隔震桥梁地震反应分析[J].工程力学,2008,25(3):119-125.DU Xiu-li,HAN Qiang,LIU Wen-guang.Nonlinearseismic responses of isolated bridge of LRB with bi-directional coupled model[J].Engineering Mechanics,2008,25(3),119-125.(in Chinese)
[2]张骏,阎贵平.减隔震支座对梁式桥抗震性能的影响[J].中国公路学报,2002,15(1):38-43.ZHANG Jun,YAN Gui-ping.Effects of isolation bearingon anti-seismic performance of RC beam bridge[J].China Journal of Highway and Transport,2002,15(1):38-43.(in Chinese)
[3]马涌泉,陈水生.基于自振与频谱特性影响的LRB连续梁桥隔震效果研究[J].武汉理工大学学报,2011,33(7):101-106.MA Yong-quan,CHEN Shui-sheng.Research on isolatedeffect of continuous girder bridges with LRB based oninfluenced by self-vibration characteristic and spectrumcharacteristic[J].Journal of Wuhan University ofTechnology,2011,33(7):101-106.(in Chinese)
[4]SPENCER B F,DYKE S J,SAIN M K.Phenomenalogical model for magnet or ecological dampers[J].Journal of Engineering Mechanics,1997,123(3):230-238.
[5]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 Zhi-hao,CHEN Zheng-qing.Skyhook control ofisolated elevated highway bridge based on magnetorheological(MR)damper[J].Journal of Vibration andShock,2010,29(12):196-199.(in Chinese)
[6]张延年,刘斌,李艺,等.MRD与LRB相混合的结构振动控制[J].东北大学学报:自然科学版,2006,27(1):95-98.ZHANG Yan-nian,LIU Bin,LI Yi,et al.Hybrid controlof MRD and LRB for structural vibration[J].Journal ofNortheastern University:Natural Science,2006,27(1):95-98.(in Chinese)
[7]陈水生.高架桥梁地震响应模糊半主动控制[J].地震工程与工程振动,2005,25(6):165-170.CHEN Shui-sheng.Semi-active control based on fuzzytheory of seismic response for elevated highway bridges[J].Earthquake Engineering and Engineering Vibration,2005,25(6):165-170.(in Chinese)
[8]GAVIN H P,HANSON R D,FILISKO F E.Electrorheological dampers,PartⅠ:analysis and design[J].Journal of Applied Mechanics,1996,63(3):669-675.
[9]WEN Y K.Method of random vibration of hystereticsystems[J].Journal of Engineering Mechanics Division,1976,102(2):249-263.
[10]周云,徐龙河,李忠献.磁流体阻尼器半主动控制结构的地震反应分析[J].土木工程学报,2001,34(5):10-14.ZHOU Yun,XU Long-he,LI Zhong-xian.Seismicresponses of semi-control using magneto rheological fluiddampers[J].China Civil Engineering Journal,2001,34(5):10-14.(in Chinese)
[11]重庆交通科研设计院.JTG/T B02-01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
[2]张骏,阎贵平.减隔震支座对梁式桥抗震性能的影响[J].中国公路学报,2002,15(1):38-43.ZHANG Jun,YAN Gui-ping.Effects of isolation bearingon anti-seismic performance of RC beam bridge[J].China Journal of Highway and Transport,2002,15(1):38-43.(in Chinese)
[3]马涌泉,陈水生.基于自振与频谱特性影响的LRB连续梁桥隔震效果研究[J].武汉理工大学学报,2011,33(7):101-106.MA Yong-quan,CHEN Shui-sheng.Research on isolatedeffect of continuous girder bridges with LRB based oninfluenced by self-vibration characteristic and spectrumcharacteristic[J].Journal of Wuhan University ofTechnology,2011,33(7):101-106.(in Chinese)
[4]SPENCER B F,DYKE S J,SAIN M K.Phenomenalogical model for magnet or ecological dampers[J].Journal of Engineering Mechanics,1997,123(3):230-238.
[5]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 Zhi-hao,CHEN Zheng-qing.Skyhook control ofisolated elevated highway bridge based on magnetorheological(MR)damper[J].Journal of Vibration andShock,2010,29(12):196-199.(in Chinese)
[6]张延年,刘斌,李艺,等.MRD与LRB相混合的结构振动控制[J].东北大学学报:自然科学版,2006,27(1):95-98.ZHANG Yan-nian,LIU Bin,LI Yi,et al.Hybrid controlof MRD and LRB for structural vibration[J].Journal ofNortheastern University:Natural Science,2006,27(1):95-98.(in Chinese)
[7]陈水生.高架桥梁地震响应模糊半主动控制[J].地震工程与工程振动,2005,25(6):165-170.CHEN Shui-sheng.Semi-active control based on fuzzytheory of seismic response for elevated highway bridges[J].Earthquake Engineering and Engineering Vibration,2005,25(6):165-170.(in Chinese)
[8]GAVIN H P,HANSON R D,FILISKO F E.Electrorheological dampers,PartⅠ:analysis and design[J].Journal of Applied Mechanics,1996,63(3):669-675.
[9]WEN Y K.Method of random vibration of hystereticsystems[J].Journal of Engineering Mechanics Division,1976,102(2):249-263.
[10]周云,徐龙河,李忠献.磁流体阻尼器半主动控制结构的地震反应分析[J].土木工程学报,2001,34(5):10-14.ZHOU Yun,XU Long-he,LI Zhong-xian.Seismicresponses of semi-control using magneto rheological fluiddampers[J].China Civil Engineering Journal,2001,34(5):10-14.(in Chinese)
[11]重庆交通科研设计院.JTG/T B02-01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心