连接相邻结构的黏滞流体阻尼器性能研究
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摘要
对近断层地震作用下连接相邻结构的非线性黏滞流体阻尼器的控制效果和性能进行了研究.根据阻尼器布置位置的不同共定义了3种分析工况.首先确定了各工况耦联结构耗能体系的动力响应;其次通过参数化研究得到了各工况中阻尼器的优化阻尼系数;最后基于阻尼器的最大输出力和最大冲程,对阻尼器的性能进行了详细的评价.研究表明:不同布置方式下阻尼器的优化阻尼系数大致相同;目前的技术条件可以满足不同布置方式下所需阻尼器的最大输出力和最大冲程.
The behavior of viscous fluid dampers interconnecting adjacent structures under near-fault ground motions was investigated.According to the different arrangements of dampers,three different analysis conditions were defined.First the seismic response of coupling structures was determined;then extensive parametric studies were carried out to obtain the appropriate damping coefficient of the dampers under different layouts,finally the behavior of viscous fluid dampers was studied.Results show that the optimal damping coefficients of dampers under different analysis conditions are nearly the same.According to the current technology conditions,the maximum output force and stroke of the dampers can be satisfied.
The behavior of viscous fluid dampers interconnecting adjacent structures under near-fault ground motions was investigated.According to the different arrangements of dampers,three different analysis conditions were defined.First the seismic response of coupling structures was determined;then extensive parametric studies were carried out to obtain the appropriate damping coefficient of the dampers under different layouts,finally the behavior of viscous fluid dampers was studied.Results show that the optimal damping coefficients of dampers under different analysis conditions are nearly the same.According to the current technology conditions,the maximum output force and stroke of the dampers can be satisfied.
引文
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[2]Zhang W S,Xu Y L.Dynamic characteristics andseismic response of adjacent buildings linked by dis-crete dampers[J].Earthquake Engineering and Struc-tural Dynamics,1999,28(10):1163-1185.
[3]Zhang W S,Xu Y L,Lu X L.Experimental seismicstudy of adjacent buildings with fluid dampers[J].Journal of Structural Engineering,2003,129(2):197-205.
[4]Zhu H P,Iemura H.A study on interact ion controlfor seismic response of parallel structures[J].Com-puters and Structures,2001,79(2):231-242.
[5]Zhu H P,Xu Y L.Optimum parameters of Maxwellmodel-defined dampers used to link adjacent struc-tures[J].Journal of Sound and Vibration,2005,279(1-2):253-274.
[6]Zhu H P,Ge D D,Huang X.Optimum connectingdampers to reduce the seismic responses of parallelstructures[J].Journal of Sound and Vibration,2011,330(9):1931-1949.
[7]Park S W,Ghasemi H,Shen J,et al.Simulation ofthe seismic performance of the Bolu Viaduct subjectedto near-fault ground motions[J].Earthquake Engi-neering and Structure Dynamics,2004,33(13):1249-1270.
[8]樊剑,涂家祥,吕超,等.采用时频滤波技术的近断层脉冲地震人工模拟[J].华中科技大学学报:自然科学版,2008,36(11):116-119.
[9]Dicleli M.Supplemental elastic stiffness to reduceisolator displacement for seismic-isolated bridges innear-fault zones[J].Engineering Structures,2007,29(5):763-775.
[10]Wen Y K.Method for random vibration of hysteret-ic systems[J].Journal of the Engineering MechanicsDivision,1976,102(2):249-263.
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