摘要
本文采用多质点层间剪切型模型 ,建立了带限位器基础滑移隔震多层砌体结构在考虑竖向地震作用影响下的运动微分方程及滑移与啮合状态判别准则。研究表明 ,竖向地震作用的存在 ,使结构下部各层特别是首层的层间位移 ,层间剪力增加 ,隔震层加速度增加 ,且随地震烈度、竖向加速度峰值增大而增加 ,并使隔震层的滑动位移幅值有增大的可能。建议在高烈度地区考虑竖向地震作用对结构反应的影响。
Through interlaminar shear model with multi-degrees of freedom, the equation of motion and the rule distinguishing slide and joggle are established with regard to base-isolated masonry structure with slide-limited device, considering earthquake action in vertical direction. The research shows that the interstorey displacement, the interstorey shear force at lower layers, especially at the first layer, and the acceleration of isolated layers are increased due to the existence of vertical earthquake. The more are the earthquake intensity and vertical acceleration augmented, the more are the displacement and shear force increased. It is possible to make the maximum displacement of isolated layer increase. So, the influence of earthquake action in vertical directions on masonry structure's response can't be ignored in high earthquake intensity zone.
出处
《振动与冲击》
EI
CSCD
北大核心
2004年第1期74-77,共4页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目 (40 0 72 0 0 6)
东北大学博士论文资助项目
关键词
限位器
滑移隔震砌体结构
竖向地震作用
时程分析
摩擦系数
Dynamic mechanical analysis
Earthquake effects
Equations of motion
Numerical methods
Shear stress
Vibration measurement
