形状记忆合金-摩擦三维隔振体系地震响应分析  

Analysis of seismic responses of SMA-friction three-dimensional isolated system

作　　者：张振华[1] 白洁[1] 王钦亭[1] 绳飘[1] 

机构地区：[1]河南理工大学土木工程学院,河南焦作454000

出　　处：《河南理工大学学报（自然科学版）》2017年第5期106-112,共7页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(51308195);河南省科技厅科技攻关项目(132102210252)

摘　　要：为研究近场强震下结构的地震响应,构造了水平向和垂向弹性解耦的形状记忆合金-摩擦三维隔振器(3DSMAFBI),并采用Newmark法和修正的Newton-Raphson迭代法对地震作用下隔振结构层间动力学模型进行求解。地震响应的数值研究结果表明:当垂向和水平向地震波加速度峰值相近时,有、无垂向地震作用时被控结构隔振层力-位移关系差别较大;上部结构垂向自振周期增加时,结构的基底轴力和剪力显著减小,而上部结构水平向位移峰值无显著变化。通过结构参数化研究,确定了三维隔振结构参数,并比较了无隔振、SMA-摩擦水平向隔振和三维隔振时结构的地震响应,证明了SMA-摩擦三维隔振器能对水平向和垂向的结构起到良好的隔振作用。In order to study the seismic responses of structure under near-filed strong earthquake,a three-di- mensional isolator consisted of SMA and friction elements（3DSMAFBI） is proposed. The Newmark method and Modified Newton-Raphson iteration method are used to solve the dynamic equations of interlayer of the struc- ture isolated with SMA-frietion isolator. The results of seismic responses show that when the peak value of seis- mic wave accelerates in horizontal direction is close to the one in vertical direction, the force-displacement rela- tions of isolation layer with and without vertical component of earthquake are significant difference. Therefore, the vertical component can＇t be ignored. When the vertical natural periods of superstructure increases, the base axial force and base shear of the structures decreases significantly, whereas, the vertical natural periods of su- perstructure have weak influence on the peak of displacement of superstructure. Through study of the isolation structure,the parameters of SMA-friction three dimensional isolation structure are determined, and then the seismic responses of the structure with no isolation are compared. The SMA-friction horizontal isolation and three dimensional isolation,the results show that SMA-friction three-dimensional isolator exhibit significant iso- lation effects on the structure in horizontal direction and vertical direction.

关 键 词：三维隔振体系 形状记忆合金 摩擦 地震响应 

分 类 号：TU311.3[建筑科学—结构工程] U442.55[建筑科学—桥梁与隧道工程]