多维多点输入下压电智能网壳结构的动力稳定性分析
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摘要
以40 m跨度K6型单层球面网壳为研究对象,采用时程分析法对大跨空间网壳结构进行了多维多点输入和单点一致输入下的地震响应分析,比较了2种地震荷载作用下的结构响应;将大跨空间网壳结构中受力较大的杆件替换为压电智能杆件,对比分析了多维多点输入下结构安装压电智能杆件前后的地震响应变化。结果表明:多维多点输入相对单点一致输入对大跨空间网壳结构会产生更加不利的影响,在网壳结构的抗震设计中是必须考虑的;安装压电智能杆件后结构多数杆件的地震响应明显减小,达到了稳定控制的效果。
The seismic response of 40 m span of K6 single-layer reticulated shell was analyzed in the conditions of multi-dimensional and multi-support excitations,and simple support excitation respectively based on the time history analysis method.The structural responses under the two forms of earthquake loads were compared.Piezoelectric intelligent bars were installed at the weak parts of the long-span space reticulated shell structures.The seismic response changes of the structures before and after the installation of piezoelectric intelligent bar were compared under multi-dimensional and multi-support excitations.The results show that multi-dimensional and multi-support excitations on long-span space reticulated shell structures will have more adverse impact than single support excitation and thus could be considered in design process.The seismic response of the majority bars reduce significantly after the structure installing the piezoelectric intelligent bars,which reach the effect of structure intelligent stable control.
The seismic response of 40 m span of K6 single-layer reticulated shell was analyzed in the conditions of multi-dimensional and multi-support excitations,and simple support excitation respectively based on the time history analysis method.The structural responses under the two forms of earthquake loads were compared.Piezoelectric intelligent bars were installed at the weak parts of the long-span space reticulated shell structures.The seismic response changes of the structures before and after the installation of piezoelectric intelligent bar were compared under multi-dimensional and multi-support excitations.The results show that multi-dimensional and multi-support excitations on long-span space reticulated shell structures will have more adverse impact than single support excitation and thus could be considered in design process.The seismic response of the majority bars reduce significantly after the structure installing the piezoelectric intelligent bars,which reach the effect of structure intelligent stable control.
引文
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[4]史志利,李忠献.随机地震动场多点激励下大跨度桥梁地震反应分析方法[J].地震工程与工程振动,2003,23(4):124-130.SHI Zhi-li,LI Zhong-xian.Methods of Seismic Re-sponse Analysis for Long-span Bridges Under Multi-support Excitations of Random Earthquake GroundMotion[J].Earthquake Engineering and EngineeringVibration,2003,23(4):124-130.
[5]丁阳,林伟,李忠献.大跨度空间结构多维多点非平稳随机地震反应分析[J].工程力学,2007,24(3):97-103.DING Yang,LIN Wei,LI Zhong-xian.Non-stationaryRandom Seismic Analysis of Long-span Spatial Struc-tures Under Multi-support and Multi-dimensionalEarthquake Excitations[J].Engineering Mechanics,2007,24(3):97-103.
[6]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 Jin-ping.Structural Vibration Control-Active,Semi-active and Intelligent Control[M].Beijing:Sci-ence Press,2003.
[7]李俊宝,吕刚.智能桁架结构振动控制中压电主动构件的研究:(一)压电主动构件设计[J].压电与声光,1998,20(2):89-94.LI Jun-bao,LU Gang.Research on Piezoelectric Ac-tive Member in Vibration Control of Intelligent TrussStructure:(1)Design of Piezoelectric Active Member[J].Piezoelectrics&Acoustooptics,1998,20(2):89-94.
[8]李俊宝,吕刚.智能桁架结构振动控制中压电主动构件的研究:(二)压电主动构件的实验[J].压电与声光,1998,20(3):180-185.LI Jun-bao,LU Gang.Research on Piezoelectric Ac-tive Member in Vibration Control of Intelligent TrussStructure:(2)Experiment of Piezoelectric ActiveMember[J].Piezoelectrics&Acoustooptics,1998,20(3):180-185.
[9]高伟,陈建军,马洪波,等.随机参数智能桁架结构振动控制中主动杆件的优化配置[J].振动工程学报,2003,16(1):89-94.GAO Wei,CHEN Jian-jun,MA Hong-bo,et al.Opti-mal Placement of Active Rods in Active VibrationControl of Smart Truss Structures with Random Par-ameters[J].Journal of Vibration Engineering,2003,16(1):89-94.
[10]田鹏刚.空间结构智能稳定控制的基本理论与试验研究[D].西安:西安建筑科技大学,2007.TIAN Peng-gang.Theoretical and Experimental Re-search on the Intelligent Stability Control of SpaceStructure[D].Xi an:Xi an University of Architecture&Technology,2007.
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