位移放大型粘弹性阻尼器减震结构地震响应分析方法研究

摘要

In this paper,a novel viscoelastic damper with displacement amplification device is proposed.The theoretical formula of the damping force of the viscoelastic damper with the displacement amplification device is derived.Aiming at viscoelastic damping structures with displacement amplification device,a equivalent energy method (EEM) is proposed to simplify calculation based on the principle of energy equivalence.The structure layer acceleration,inter-story displacement,inter-story shear force and damper energy dissipation are paid attention to in this paper.The effectiveness and analysis accuracy of a equivalent energy method are verified according to two models.It is shown that the computational results of new method are similar to traditional method.Through the finite element software ABAQUS,the structure with traditional viscoelastic damper and the damping structure with displacement amplification device based on a 12-story structure model are simulated numerically.The results show that viscoelastic dampers with displacement amplification device can effectively reduce the structural dynamic response,such as inter-story displacement,inter-story shear force,layer acceleration and so on.Also,It can consume more energy.%提出一种新型位移放大型粘弹性阻尼器,对附加位移放大装置的粘弹性阻尼器进行阻尼力理论公式推导.基于能量等效原则,针对位移放大型粘弹性阻尼器减震结构提出一种简化计算的等效能量法.本文关注结构层加速度,层间位移,层间剪力以及阻尼器的耗能.采用两种模型,验证等效能量法的有效性和分析精度.分析结果表明,新方法计算结果与传统方法计算结果相近.并通过有限元软件ABAQUS对一12层设置传统粘弹性阻尼器与附加位移放大装置粘弹性阻尼器的框架减震结构进行对比分析.结果表明:附加位移放大装置的粘弹性阻尼器能更有效地减小结构的层间位移、层间剪力、层加速度等结构动力响应,且耗能更为显著.