考虑土与结构相互作用效应的非弹性结构主动抗震控制研究
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摘要
本文以一幢六层框架结构为研究对象，分析了土与结构相互作用（ＳＳＩ）效应对脉冲发生器和锚索两种控制系统的主动抗震控制效果的影响。结果表明：脉冲控制比锚索控制更为有效；有软土地基条件下，ＳＳＩ效应有可能使结构主动锚索控制失效；与刚性地基假定的结果相比，ＳＳＩ效应将显著降低脉冲控制所需要的控制力，地基越软，降低的幅度越大，可达１／３～１／２；若结构抗震设计时计及ＳＳＩ效应的影响，则按刚性地基假定需设置的主动抗震设施有时可能是不必要的。
n this paper the characterisitics of active structural control including pulse control and anchor rope control considering soilstructure interaction (SSI) effects are studied.Taking a sixstorey frame structure as an example,the emphasis is placed on the variations of control efficiency and control force whether the SSI effects are considering or not.The results show that,as compared with the active anchor rope control,the effect of active pulse control is better.And under the condition of soft ground the effects of active anchor control can be almost complectly lost due to SSI effects.As compared with the results of the rigid ground assumption,the pulse control force can be greatly reduced by onethird to onehalf when SSI effects are considered.The extent of control force reduced will be increased as the soil becomes softer,and it can be unnecessary in some condition that active control devices are adoped in superstructure designed by the assumption of rigid ground if the SSI effects are considered in the structure seismic design. ,
n this paper the characterisitics of active structural control including pulse control and anchor rope control considering soilstructure interaction (SSI) effects are studied.Taking a sixstorey frame structure as an example,the emphasis is placed on the variations of control efficiency and control force whether the SSI effects are considering or not.The results show that,as compared with the active anchor rope control,the effect of active pulse control is better.And under the condition of soft ground the effects of active anchor control can be almost complectly lost due to SSI effects.As compared with the results of the rigid ground assumption,the pulse control force can be greatly reduced by onethird to onehalf when SSI effects are considered.The extent of control force reduced will be increased as the soil becomes softer,and it can be unnecessary in some condition that active control devices are adoped in superstructure designed by the assumption of rigid ground if the SSI effects are considered in the structure seismic design. ,
引文
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