摘要
通过复杂偏心结构大型振动台试验,进行了复杂偏心结构水平位移与扭转位移耦联分析。通过对有代表性的楼层进行分析表明,楼层平扭耦联反应程度与各自的频率有关,当楼层平动反应频段与扭转反应频段相近时,楼层的层间平动位移与扭转位移峰值出现的时间基本相同;结构进入塑性后导致水平刚度明显下降,而扭转刚度则下降不多,从而导致结构的平扭耦联反应程度降低,层间水平位移所占比例明显大于弹性阶段,从而为复杂偏心结构的抗震性能研究提供试验与理论依据。
Through the large-scale shaking table test of complex eccentric structure, this paper has conducted the complex ec- centric structure horizontal and torsional displacement coupling analysis. Analysis of the typical floors showed that the transla- tion-torsion coupling reaction degree of the floors is relevant to each frequency. When the translation reaction band of floor is similar to the reverse reaction band, floor interlaminar translation displacement and torsional displacement peak appear in the same time. The horizontal stiffness decreases obviously when the structure into the plastic stage while torsional stiffness is rarely fallen, which lead to the structure translation-torsion coupling reaction degree reduced and the proportion of interlaminar horizontal displacement obviously higher than elastic stage. It provides experimental and theoretical basis of the research about the complex eccentric structure seismic performance.
出处
《振动工程学报》
EI
CSCD
北大核心
2014年第2期275-280,共6页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(51278335)
国家青年科学基金资助项目(51208356)
关键词
振动台试验
水平位移
扭转位移
复杂偏心结构
耦联分析
shaking table test； horizontal displacement
torsional displacement
complex eccentric structure； coupling analysis
