设置粘滞阻尼器的RC框架结构节点内力控制与减震分析  

Joints core force control and seismic isolation analysis of a RC frame structure equipped with viscous dampers

作　　者：郭镪文 张永山[1] 黄文成[1] Guo Qiangwen Zhang Yongshan Huang Wencheng(School of Civil Engineering of Guangzhou University, Guangzhou 510006, China)

机构地区：[1]广州大学土木工程学院,广东广州510006

出　　处：《建筑科学》2017年第7期78-84,共7页Building Science

基　　金：国家自然科学基金项目(51378135;51408140);广州市科技计划项目(201607010151;201510010291)

摘　　要：针对某4层RC框架结构部分节点核心区剪力设计值与层间位移角不满足规范要求的问题,引入消能减震技术对结构进行减震控制。首先,采用随机平均法对非线性粘滞阻尼器进行等效线性化,进一步基于YJK和ETABS软件平台采用振型分解反应谱法和时程分析法对等效线性化前后的结构模型进行分析,研究了结构节点内力、层间位移角和楼层剪力的变化情况。结果表明:结构增设粘滞阻尼器后,能有效减小结构节点内力、层间位移角和楼层剪力,使其在地震作用下满足规范要求,结构整体抗震性能得到有效改善;随机平均法可用于非线性粘滞阻尼器的等效线性化,等效线性化前后结构节点内力相差很小。For the joints core shear force and storey drift angle of a 4-storey RC frame structure can not meet the requirements of code,energy dissipation technique is adopt for seismic control of structure. The equivalent linearization is conducted for nonlinear viscous damper with stochastic averaging method. Further,the structure is analyzed with the mode-superposition response spectrum method and the time history analysis method by YJK and ETABS softwares. The variation of joints core shear force,storey drift angle and storey shear force are studied. The results show that： the joints core shear force,storey drift angle and storey shear force are reduced obviously after adding viscous dampers under the earthquake,which meets the requirements of code,and the seismic performance can be effectively improved; the stochastic averaging method can be used in the nonlinear viscous damper to the equivalent linearization,and the difference between the joints core shear force calculated by two method is very small.

关 键 词：RC框架结构 节点核心区 消能减震技术 粘滞阻尼器 等效线性化 

分 类 号：TU352.1[建筑科学—结构工程]