In recent years the application of friction-based passive energy dissipation devices have been proven very effective in reducing structural response to earthquake excitations and also implemented for a large number of...In recent years the application of friction-based passive energy dissipation devices have been proven very effective in reducing structural response to earthquake excitations and also implemented for a large number of buildings. Their design heavily relies on numerical simulations to model the influence of the energy dissipation devices. The modeling of friction forces must be accurate for realistic simulation of the influence of these devices. In state-of-the-practice, the hysteretic behavior of friction devices has been typically modeled with Coulomb friction having a constant coefficient of friction. However, the basic laws for typical sliding materials and experimental investigations show non-linear relationship between friction and sliding velocity, which includes stiction and Stribeck effect. The influence of stiction and Stribeck effect may be significant and can not be ignored in simulating the dynamic responses of structures with friction-based energy dissipation devices. In this paper the optimal performance of dry friction device in shear-frame buildings when subjected to earthquake ground motions has been investigated. The focus of this paper is on the optimal minimization of response of the shear-frame building. Since buildings with friction devices behave in a highly nonlinear manner, nonlinear response-history analysis considering comprehensive sliding friction models has been carried out. The performance has also been evaluated using the various response measures： the maximum absolute acceleration, the maximum base shear, and the maximum inter-story drift. Different performance indices have been used to quantify the influence of the device properties.展开更多
针对AMD(active m ass damper)Benchm ark问题,将μ综合控制理论引入到结构控制领域.详细阐述了μ设计权函数的选取方法,建立了AMD系统的综合设计模型;根据μ理论设计了控制器,并通过平衡截断法对控制器进行降阶得到三阶控制器;最后对...针对AMD(active m ass damper)Benchm ark问题,将μ综合控制理论引入到结构控制领域.详细阐述了μ设计权函数的选取方法,建立了AMD系统的综合设计模型;根据μ理论设计了控制器,并通过平衡截断法对控制器进行降阶得到三阶控制器;最后对系统的鲁棒稳定性和鲁棒性能进行了分析,仿真结果证明了μ控制器的有效性.展开更多
文摘In recent years the application of friction-based passive energy dissipation devices have been proven very effective in reducing structural response to earthquake excitations and also implemented for a large number of buildings. Their design heavily relies on numerical simulations to model the influence of the energy dissipation devices. The modeling of friction forces must be accurate for realistic simulation of the influence of these devices. In state-of-the-practice, the hysteretic behavior of friction devices has been typically modeled with Coulomb friction having a constant coefficient of friction. However, the basic laws for typical sliding materials and experimental investigations show non-linear relationship between friction and sliding velocity, which includes stiction and Stribeck effect. The influence of stiction and Stribeck effect may be significant and can not be ignored in simulating the dynamic responses of structures with friction-based energy dissipation devices. In this paper the optimal performance of dry friction device in shear-frame buildings when subjected to earthquake ground motions has been investigated. The focus of this paper is on the optimal minimization of response of the shear-frame building. Since buildings with friction devices behave in a highly nonlinear manner, nonlinear response-history analysis considering comprehensive sliding friction models has been carried out. The performance has also been evaluated using the various response measures： the maximum absolute acceleration, the maximum base shear, and the maximum inter-story drift. Different performance indices have been used to quantify the influence of the device properties.
文摘针对AMD(active m ass damper)Benchm ark问题,将μ综合控制理论引入到结构控制领域.详细阐述了μ设计权函数的选取方法,建立了AMD系统的综合设计模型;根据μ理论设计了控制器,并通过平衡截断法对控制器进行降阶得到三阶控制器;最后对系统的鲁棒稳定性和鲁棒性能进行了分析,仿真结果证明了μ控制器的有效性.
