摘要
对实际底层柱顶隔震结构的抗震性能及其底层结构安全性进行分析，应用有限元软件Perfbnn3D建模，进行动力弹塑性时程分析。结果表明：在设防烈度7度（0．15g）中震作用下，楼层剪力大幅度减小；在超设防烈度8度（0．20g）大震作用下，上部结构层间位移角最大值为1／327，而底层结构最大值为1／913，楼层加速度反应减震率在68．4％-84．9％。分析进一步表明：隔震结构抗震性能可以满足超设防烈度（半度）要求，显著提高了抗震性态水平，抗震设防目标高于抗震结构。
To analysis the seismic performance and the underlying structure safety of an actual structure with i- solation on first-story columns＇ top,dynamic elastic-plastic time history analysis of finite element model was estab- lished by using finite element analysis software Perform 3D. The results showed that the floor shear substantially was reduced under the frequent earthquake of 7 degree （0. 15g）. The maximum interlayer displacement angle of upper structure was 1/327 under the rare earthquake of 8 degree （0.2g）. The maximum interlayer displacement angle of the first story was 1/913, and the floor acceleration damping ratio was 68.4% - 84.9%. Further analysis showed that the seismic performance of structure could achieve target under ultra intensity earthquake （ half degree）, seis- mic performance level of isolated structure significantly increased and seismic fortification goal was higher than seis- mic structure.
出处
《南昌大学学报（工科版）》
CAS
2014年第4期341-346,372,共7页
Journal of Nanchang University(Engineering & Technology)
基金
福建省住建厅科技计划资助项目(2010K05)
关键词
柱顶隔震
超设防烈度
抗震性态水平
抗震设防目标
isolation layer on columns＇ top
ultra intensity earthquake
seismic performance level
seismic for-tification goal
作者简介
江栋恒（1970-），男，高级工程师。
