摘要
为了研究设备所在楼层位置对设备-结构相互作用的影响,以某高层钢框架为例,将设备分别放置于结构顶层和底层设计了2种设备-结构体系模型,然后利用ANSYS有限元分析软件对整体模型进行地震响应时程分析。分析结果表明:在El Centro波、Taft波和人工波作用下,当设备频率与结构基频调谐时,设备-结构相互作用会令结构动力响应减小而设备动力响应显著增大;设备-结构相互作用的大小与设备所在楼层密切相关:顶层设备与结构间的相互作用比底层更加剧烈,这与位于不同楼层的设备间等效质量以及底端输入激励频谱的差异有关。
In order to study the influence of the location of equipment on equipment-structure interaction, a high-rise steel frame is taken as an example, in which the equipment is placed on the top of the structure and the bottom of the structure respectively. Two kinds of equipment-structure system models are designed, and the whole analytical model is established by using ANSYS program for the seismic response analysis. The results indicate that under the action of E1 Centro wave, Taft wave and artificial wave, the equipment-structure interaction reduces the dynamic response of the structure whereas the dynamic response of the equipment increases significantly when the equipment frequency and the structure fundamental frequency are tuned. The interaction between the equipment and the structure is closely related to the location of the equipment, and the interaction between the equipment located on the top floor and the structure is more intense than the equipment located at the bottom floor. This is because of the differences between the equivalent quality and the input excitation spectrum at the bottom of the equipment located on the different floors.
作者
姜忻良
马小丹
Jiang Xinliang;Ma Xiaodan(Key Laboratory of Coastal Civil Engineering Structure and Safety, School of Civil Engineering, Tianjin University, Tianjin 300072, Chin)
出处
《震灾防御技术》
CSCD
北大核心
2018年第2期320-330,共11页
Technology for Earthquake Disaster Prevention
基金
国家自然科学基金项目(51478312、51278335)
关键词
设备-结构体系
动力相互作用
设备所在楼层
时程分析法
Equipment-structure system
Dynamic interaction
The location of equipment
Time-history analysis
