设有自适应刚度减震装置多塔连体结构的减震效应分析

The Effect of Vibration Reduction for a Multi-Tower Connecting Structure with Adaptable Stiffness Device

提出了一种适用于减震结构不同水准抗震性能设计要求的新型自适应刚度减震装置,在不同变形下可呈现出正刚度、负刚度、准零刚度特性。基于新型自适应刚度装置的元件刚度及初始倾斜角对装置受力变形特性的影响建立恢复力模型,并进一步进行了力学参数的影响分析,得到元件刚度和初始倾斜角对装置力学性能的影响规律。最后将所提出的自适应刚度装置应用于多塔连体结构高空连廊中,对连体结构进行了不同水准地震下的动力时程分析,结果表明,新型自适应刚度减震装置适应不同水准抗震性能设计需求,并且对连廊和主体结构具有较好的减震耗能效果,可同时控制结构在地震作用下的加速度响应和连廊与主体结构的相对位移。

In this paper,an innovative damping adaptable stiffness device was introduced.The adaptable stiffness device can provide positive,negative or quasi-zero stiffness under special deformation.A hysteretic model was established based on the deformation properties.Parametric analysis was conducted.Stiffness and original inclination angle of the springs have great influence on mechanical properties.The proposed device was applied to a sky-bridge of a multi-tower connecting structure.Earthquake response analysis was conducted considering varied upper structures and seismic cases.Analysis results showed that the proposed device can be used to meet specific design requirements under various mechanical performances.Acceleration response and relative displacement of the sky-bridge and main structure can be effectively controlled.