基于模糊控制的MR阻尼器在结构抗震中的应用研究
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摘要
为了更加有效的减小受控结构在地震作用下的动力响应,采用在结构中安装磁流变阻尼器的方法,同时运用模糊控制器瞬时而准确的确定磁流变阻尼器控制电流,完成对结构的半主动控制。以磁流变阻尼器所在层在地震作用下的速度响应和结构顶层位移响应作为输入量,以控制电流为输出量,根据抗震规范和实际经验提出了合理的模糊规则。对一个3层钢筋混凝土结构进行了实例分析,并与被动控制结构和无控结构进行了对比,结果表明模糊控制对结构的位移响应和加速度响应,较之被动控制都有更好的控制效果。
In order to reduce the dynamic responses of controlled structure under earthquake action more effectively,by using magnetorheological damper installed in the structure,the fuzzy controller was adopted to determine the controlled currents of magnetorheological damper quickly and accurately,then structures are controlled semi-actively. Taking volocity response of the floor at which the magnetorheological damper was instaledl,and structures displacement responses as inputs,and controlled current as output,fuzzy rules are designed reasonably according to seismic code and practical experience. Through a numerical example of a three storeys reinforced concrete structure,and a comparison with passive controlled structure and uncontrolled structure,it can be concluded that both displacement responses and acceleration responses of fuzzy controlled structure are reduced more effectively than those of passive controlled structure.
In order to reduce the dynamic responses of controlled structure under earthquake action more effectively,by using magnetorheological damper installed in the structure,the fuzzy controller was adopted to determine the controlled currents of magnetorheological damper quickly and accurately,then structures are controlled semi-actively. Taking volocity response of the floor at which the magnetorheological damper was instaledl,and structures displacement responses as inputs,and controlled current as output,fuzzy rules are designed reasonably according to seismic code and practical experience. Through a numerical example of a three storeys reinforced concrete structure,and a comparison with passive controlled structure and uncontrolled structure,it can be concluded that both displacement responses and acceleration responses of fuzzy controlled structure are reduced more effectively than those of passive controlled structure.
引文
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[2]郭安薪,李惠,欧进萍.广畅国际大厦磁流变和粘滞阻尼器抗震分析[J].世界地震工程,2003,19(4):45-50.GUO An-Xin,LI Hui,OU Jin-Ping.Aseismic analysis of Guangchang Intenational Center with the MR and viscous dampers[J].World Earthquake Engineering,2003,19(4):45-50.
[3]谭平,阎维明,周福霖.大平台多塔楼新型隔震体系的智能磁流变控制[J].工程抗震与加固改造,2007,29(3):41-47.Tan Ping,Yan Wei-ming,Zhou Fu-lin.Smart Control for a New Seismic Isolation System of Multi-tower Structure on a Large Platform Using MR Dampers,2007,29(3):41-47.
[4]汲广军.房屋建筑基础减震的磁流变半主动控制研究[硕士][D].武汉,武汉理工大学,2008.Ji Guang-jun.The Research of Semi-active Control of Building's Base Isoation with Magneto-rheological Damper[Master][D].Wuhan,Wuhan University of Technology,2008.
[5]徐赵东,郭迎庆.MATLAB语言在建筑抗震工程中的应用[M].北京:科学出版社,2004:218.Xu Zhao-dong,Guo Ying-qing.MATLAB In Building Aseismic Engineering[M].Beijing:Science Press,2004:218.
[6]Wereley N M,Pang L,Kamath G M.Idealized hysteresis modeling of electrorheological and magnetorheological dampers[J].Journal of Intelligent Material Systems and Structures,1998,9(6):642-649.
[7]Xu Zhaodong,Shen Yapeng,Guo Yingqing.Semi-active control of structures incorporated with magnetorheological dampers using neural networks[J].Smart Materials and Structures,2003,12(1):80-87.
[8]中华人民共和国住房和城乡建设部.中华人民共和国国家标准GB50011-2010:建筑抗震设计规范[S].北京:中国建筑工业出版社,2010:44.MOHURD.GB50011-2010:Code for seisnuc design of buildings[S].Beijing:China Architecture&Building Press,2010:44.
[9]徐赵东,沈亚鹏.磁流变阻尼器的双态控制和三态控制弹塑性分析[J].西安交通大学学报,2003,37(7):754-758.Xu Zhaodong,Shen Yapeng.Elastoplastic Analysis for Magnetorheological Structure under Bi-State Control and Tri-State Control[J].Xi'an Jiaotong University Xuebao,2003,37(7):754-758.
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