邹宏德  蓝宗建  梁书亭  戴  航
（东南大学土木工程学院  南京 210096）

[提要]  对地震作用下钢筋混凝土巨型框架多功能减振结构主次框架发生碰撞时结构的地震反应进行了分析，研究了间隙单元动力参数的影响。分析结果表明，在主次框架间可能发生碰撞的部位设置缓冲弹簧装置以减小结构地震碰撞的影响是必要的；间隙单元动力参数对钢筋混凝土巨型框架多功能减振结构体系的地震反应有着重要的影响，在满足缓冲弹簧装置行程限值的条件下，应选择刚度较小的缓冲弹簧装置。
[关键词]  钢筋混凝土巨型框架  结构地震碰撞  有限元方法  时程分析

The effect of the pounding between the major frame and the minor frame on the seismic responses of multifunctional vibration-absorption RC, megaframe structure during the earthquakes is analyzed. A parametric study is carried out to investigate the influence of the main parameters of the gap elements. The analytical result shows that it is urgently needed to place the buffer string devices to mitigate the seismic responses of the structure between the major frame and the minor frame where the structural seismic pounding could occur. The influence of the main parameters of the gap elements on the seismic responses of the RC megaframe structure is considerable. The smaller stiffness of the buffer string should been chosen when the restrictive condition is admitted.
Keywords: concrete megaframe structure; structural seismic pounding; finite element method; time history analysis