滑移隔震结构的能量谱研究
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摘要
给出了滑移隔震结构等效速度谱的计算公式,以两质点的平面滑移隔震结构为研究对象,通过对能量谱的研究,分析了能量谱随着各种设计参数的变化规律。结果表明:摩擦系数和上部结构的自振周期对输入能量有着显著的影响,且影响规律较为复杂;输入能量随着隔震层与上部结构质量比的增大基本呈减小的趋势,而隔震层的自振周期对输入能量的影响不太显著。
Calculation formulas of equivalent velocity spectrum of sliding base-isolated structure are given in this paper,and change rules of energy spectrum with the changes of the various design parameters,taking two particles of plain sliding base-isolated system of building structure as the research object are analyzed through the research on energy spectrum.The results show that friction coefficient and the natural vibration period of superstructure have significant effects on input energy and the change rules are very complicated.Input energy has a decline trend with the increase of the mass ratio of isolation layer and superstructure,while the natural vibration period of isolation layer has an insignificant effect on input energy.
Calculation formulas of equivalent velocity spectrum of sliding base-isolated structure are given in this paper,and change rules of energy spectrum with the changes of the various design parameters,taking two particles of plain sliding base-isolated system of building structure as the research object are analyzed through the research on energy spectrum.The results show that friction coefficient and the natural vibration period of superstructure have significant effects on input energy and the change rules are very complicated.Input energy has a decline trend with the increase of the mass ratio of isolation layer and superstructure,while the natural vibration period of isolation layer has an insignificant effect on input energy.
引文
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[3]张宇,金峤,周晶.基于性能的既有砌体结构隔震加固研究[J].工程抗震与加固改造,2010,32(6):60～66Zhang Yu,Jin Qiao,Zhou Jing.Research onPerformance-based Isolated Technique for Existing Masonry Structures[J].Earthquake Resistant Engineering andRetrofitting,2010,32(6):60～66(in Chinese)
[4]Housner G W.Limit Designs of Structures to ResistEarthquake[A].Proceedings of 1st World ConferenceEarthquake Engineering[C],Berkely,CA,1956
[5]经杰,叶列平,钱稼茹.基于能量概念的剪切型多自由度体系弹塑性地震位移反应分析[J].工程力学,2003,20(3):31～36Jing Jie,Ye Lie-ping,Qian Jia-ru.Inelastic SeismicResponse of Lumped Mass Md of System Based onEnergy Concept[J].Engineering Mechanics,2003,20(3):31～36(in Chinese)
[6]Ye Lie-ping,Otani Shunsake.Maximum SeismicDisplacement of Inelastic System Based on EnergyConcept[J].Earthquake Engineering and StructureDynamics,1999,12():1483～1499
[7]王亚勇.关于设计反应谱、时程法和能量方法的探讨[J].建筑结构学报,2000,21(1):21～28Wang Ya-yong.A Review of Seismic Response Spectra,Time History Analysis and Energy Method[J].Journal ofBuilding Structures,2000,21(1):21～28(in Chinese)
[8]Uang C M,Bertero V V.Evaluation of Seismic Energy inStructures[J].Earthquake Engineering and StructuralDynamics,1990,19(1):77～90
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