摘要
对于桩承高层建筑与周围土体组成的相互体系采用样条子域法、半解析无限元法和直梁的弯剪单元模型相耦合的方法进行建模,并结合瞬时最优控制算法,分析了其对结构磁流变(MR)阻尼器控制的影响作用。算例表明,考虑结构-桩-土相互作用与不考虑相互作用的固定端体系的控制计算结果有一定差异,该文计算的差值可达5%以上。考虑相互作用与不考虑相互作用相比,其地震反应减少了。如果不考虑相互作用,将使结构自身的耗能能力起不到相应的作用。在设计高层建筑的控制系统时一定要注意土-结构相互作用的影响,才能取得理想的控制效果。
The interaction system, which includes pil e-supported tall buildings and the adjacent medium of soil, subject to the impact of earthquake is formulated in terms of the spline subdomain method, semi-analytical infinite element method and the bend-shear model of beam element, respectively. Taking advantage of the instantaneous optimal control algorithm, structure -piles-soil interaction effect on the magneto-rheological （MR） damper control is considered. It is shown that the structure control generates obvious different results between the interaction system and the fixed-end system. The response of the former may be 5 percent or more than the latter. The dissipative capability of the structural self will be omitted largely if the interaction isn＇t considered. To design the control system, especially for some tall buildings, soil-structure interaction should be taken into consideration.
出处
《工程力学》
EI
CSCD
北大核心
2009年第A01期134-138,共5页
Engineering Mechanics
基金
河北省教育厅自然科学重点项目(ZH2006014)
建设部研究开发项目(06-K1-11)
关键词
结构控制
土-结构相互作用
样条子域法
MR控制
地震反应
structure control
soil-structure interaction （SSI）
spline subdomain method
MR control
seismic response
