房屋与厂房建筑抗环境振动、风振与地震的基本措施
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摘要
介绍房屋与厂房建筑抗环境振动、风振与地震的三个措施:在房屋建筑的底部,布置弹簧隔振器隔离地震中的高频激振力,布置粘滞阻尼器消耗、吸收掉地震中的低频能量;在房屋建筑的高层,布置调谐质量减振器TMD抑制地震激发的振幅。这些措施都已在抗震、抗环境振动与抗风振的实践中取得了很好的效果。火电厂汽机岛厂房A列柱,由于汽轮发电机组的分隔,横向没有梁连接,刚度很小,不能抗地震。汽轮发电机组顶台板弹性支承后,顶台板下的立柱不再属于机器动力基础,而属于厂房静力基础,便可以与A列柱组成统一的厂房结构,大大增强了A列柱的刚度,采用这种结构为欧洲某强地震区设计抗9.5度地震的机器系统与厂房结构。
Three basic measures to protect buildings and structures from environment vibration,wind-induced vibration and earthquake were introduced:at the base of the structure,helical spring elements are used to isolate high frequency vibration and viscous damping elements are used to absorb and dissipate low frequency energy;at the top of the structure,tuned mass dampers are used to restrain vibration amplitude.Columns of row A at turbine building are poor of seismic protecting due to insufficient stiffness.If spring foundation is used for a turbine generator set,the columns under the turbine generator foundation deck will be transferred from a dynamic sub-structure into a static one,which can be coupled with the turbine building columns of both row A and row B to form a steel structure with sufficient stiffness.A turbine building protected from 9.5 degree earthquake at strong earthquake area in Europe with above mentioned measure is introduced.
Three basic measures to protect buildings and structures from environment vibration,wind-induced vibration and earthquake were introduced:at the base of the structure,helical spring elements are used to isolate high frequency vibration and viscous damping elements are used to absorb and dissipate low frequency energy;at the top of the structure,tuned mass dampers are used to restrain vibration amplitude.Columns of row A at turbine building are poor of seismic protecting due to insufficient stiffness.If spring foundation is used for a turbine generator set,the columns under the turbine generator foundation deck will be transferred from a dynamic sub-structure into a static one,which can be coupled with the turbine building columns of both row A and row B to form a steel structure with sufficient stiffness.A turbine building protected from 9.5 degree earthquake at strong earthquake area in Europe with above mentioned measure is introduced.
引文
[1]NAWROTZKI P.Some strategies for the reduction of seismic structural responses[C]//1~(st)ICSSD Proc.,Taipeh,December,2000.
[2]NAWROTZKI P.Passive control systems for buildings in seismically active regions[C]//ECCM Proc,Cracow,June,2001.
[3]郭惠勇,张陵,蒋健.电力电容器组架结构抗振性能的优化分析与计算[J].工程抗震,2002(12):31-36.
[2]NAWROTZKI P.Passive control systems for buildings in seismically active regions[C]//ECCM Proc,Cracow,June,2001.
[3]郭惠勇,张陵,蒋健.电力电容器组架结构抗振性能的优化分析与计算[J].工程抗震,2002(12):31-36.
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