变截面柱工业厂房横向地震反应控制
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摘要
针对工业厂房结构横向由于无法安装支撑抗侧力体系,容易在地震作用下破坏的问题,提出了厂房横向采用智能力矩控制器的抗震设计计算方法.建立了压电材料智能力矩控制器的力学模型,并推导了力矩控制器对具有变截面柱厂房结构的主动控制力表达式.建立了安装有智能力矩控制器的厂房排架横向地震反应的受控运动方程.通过数值分析,考察了在不同地震地面运动作用下智能力矩控制器的控制效果并进行了相应的参数研究.结果表明压电材料智能力矩控制器可以有效地减小厂房结构的地震反应,减振率可达25%以上.
Industrial frames are prone to lateral seismic excitations because of the absence of lateral brace systems.The seismic mitigation approach was actively proposed by using smart moment controllers.The mechanical model of the piezoelectric smart moment controller was established and the expression of the active control force produced by the smart moment controller was determined.The motion of equation of the controlled industrial frame incorporated with moment controllers was established for suppressing lateral seismic responses.The control performance of the smart controller on the industrial frame subjected to various ground motions was investigated numerically through the corresponding parameter study.The made observations demonstrate that the smart moment controller developed in this study can effectively suppress the lateral seismic responses of industrial frames.
Industrial frames are prone to lateral seismic excitations because of the absence of lateral brace systems.The seismic mitigation approach was actively proposed by using smart moment controllers.The mechanical model of the piezoelectric smart moment controller was established and the expression of the active control force produced by the smart moment controller was determined.The motion of equation of the controlled industrial frame incorporated with moment controllers was established for suppressing lateral seismic responses.The control performance of the smart controller on the industrial frame subjected to various ground motions was investigated numerically through the corresponding parameter study.The made observations demonstrate that the smart moment controller developed in this study can effectively suppress the lateral seismic responses of industrial frames.
引文
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[2]陶宝祺.智能材料结构[M].北京:国防工业出版社,1997:3-12.TAO Baoqi.Smart materials and structures[M].Beijing:National Defense Press,1997:3-12.
[3]KAMADA T,FUJITA T,HATAYAMA T.Active vibrationcontrol of frame structures with smart structures using piezo-electric actuators-vibration control by control of bending mo-ments of columns[J].Smart Materials and Structures,1997,6:448-456.
[4]AIZAWA S,KAKIZAWA T,HIGASINO M.Case studiesof smart materials for civil structures[J].Smart Materialsand Structures,1998,7:617-626.
[5]瞿伟廉,陈波,李学安.压电材料智能力矩控制器对具有不确定参数升船结构顶部厂房地震反应的鲁棒控制[J].地震工程与工程振动,2001,21(2):145-151.QU Weilian,CHEN Bo,LI Xuean.Robust control for seis-mic response of large span building on top of skip lift towerstructure with uncertain parameters by piezoelectric forcemoment controller[J].Earthquake Engineering and Engi-neering Vibration,2001,21(2):145-151.
[6]瞿伟廉.高层建筑和高耸结构的风振控制设计[M].武汉:武汉测绘科技大学出版社,1991:1-11.QUWeilian.The wind-resistant design of high rise buildingsand structures[M].Wuhan:The Press of the Wuhan Uni-versity of Surveying,1991:1-11.
[7]STENGEL R F.Stochastic optimal control:theory and appli-cation[M].New York:Wiley Press,1986:20-26.
[8]SKELTON R E.Dynamic system control:linear systems a-nalysis and synthesis[M].New York:Wiley Press,1988:2-8.
[9]王勇强,田树桐.大型发电厂主厂房结构耗能支撑减震性能研究[J].武汉大学学报:工学版,2010,43(1):44-48.WANG Yongqiang,TIAN Shutong.Research on seismic re-duction behavior of buckling-resistant brace for main build-ings of large thermal power stations[J].Journal of WuhanUniversity:Engineering Version,2010,43(1):44-48.
[10]宋远齐,汪小刚,温彦锋,梁远忠.汶川地震大型厂房框排架结构震害特征分析[J].自然灾害学报,2009,18(4):6-11.SONG Yuanqi,WANG Xiaogang,WEN Yanfeng,LIANGYuanzhong.Damage characteristics of frame-bent structure oflarge-scale factory building in Wenchuan M 8.0 earthquake[J].Journal of Natural Disasters,2009,18(4):6-11.
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