【摘要】 深圳罗湖商务大厦结构由密柱框架-筒体结构体系改为稀柱框架-筒体结构体系.为比较结构的抗震性能,对设计修改前后的结构进行了整体模型模拟地震振动台试验.首先介绍了振动台试验的过程及现象并分析了结构的破坏模式,然后对比分析了结构的动力特性和加速度及位移反应.研究表明在7度罕遇烈度地震动作用下,在等效刚度下降幅度、结构主体部分(钢筋混凝土部分)最大加速度反应、结构顶点位移反应等方面,设计修改后的结构均小于设计修改前的结构.更多还原

【Abstract】 Shenzhen Luohu Commercial Tower frame-tube structural system with dense columns was modified as a system with sparse columns.To compare seismic behavior of the structures,shaking table tests on models of original and modified structures were carried out.This paper presents the test process and result as well as an analysis of the structural cracking patterns.A comparative study of the original and modified models was conducted on their structural dynamic characteristics,acceleration and displacement responses.The results indicate that under rarely-occured earthquake of magnitude 7,the descending range of equivalent stiffness,maximum acceleration response of main structure(reinforced concrete part) and displacement response of structure top point of modified structure model are all less than those of the original one.更多还原