近场地震动下偏心结构的减震控制研究  

Seismic Response Control of Eccentric Structure Subjected to Near-Field Ground Motions

作　　者：殷伟希[1] 谭平[1] 周福霖[1] 吴曼林[1] 王昊[1] 

机构地区：[1]广州大学减震控制与结构安全国家重点实验室,广州510405

出　　处：《震灾防御技术》2010年第2期199-207,共9页Technology for Earthquake Disaster Prevention

基　　金：国家自然科学基金重点项目(90815027);国家教育部留学回国人员科研启动基金号([2009]1590)

摘　　要：本文选用远场宽频地震Kanai-Tajimi模型与近场地震He-Agrawal速度脉冲模型,对现有的典型近场地震记录进行了非线性数值拟合。通过调整脉冲分量与宽频分量的比值,得到了不同脉冲分量的地震波,分析了在合成近场地震波作用下,设置粘滞阻尼器时偏心结构的动力反应,并与未设置阻尼器时结构的地震响应进行了对比,同时也对能反映结构偏心特性的参数进行了分析研究。通过数值模拟与仿真分析,得到了一些对实际工程设计有意义的结论。In this paper,Kanai-Tajimi far-field broad-band model and He-Agrawal near-filed velocity pulse model are selected to conduct nonlinear numerical simulation of typical near-filed records,in which near-filed ground motions are obtained by adjusting the ratio of random broadband component and pulse component.Viscous dampers are considered to reduce the near-field effects,and the dynamic responses of eccentric structures with and without viscous dampers effects of near-filed ground motions are investigated systematically.The factors reflecting the characteristics of structural eccentricity are calculated too.Some significant conclusions can be obtained,which are helpful for designing eccentric building structures.

关 键 词：偏心结构 近场地震波 速度脉冲模型 粘滞阻尼器 偏心特性 

分 类 号：P315.3[天文地球—地震学]