设置黏滞阻尼器的钢结构实用减震设计方法

黏滞阻尼器作为一种有效的消能减震装置,已在钢结构建筑中得到了大量应用.然而由于钢结构的延性和阻尼特征,实用的钢结构附加黏滞阻尼器设计方法仍需深度探讨.文中提出一种基于黏滞阻尼器延性需求的减震设计方法.首先,根据钢结构需求量化层间位移角性能目标及目标附加阻尼比,计算黏滞阻尼器延性需求,并确定黏滞阻尼器布置数量、进行控制效...

Practical energy dissipation design of steel structures with viscous dampers

As effective energy-dissipating devices,viscous dampers have been extensively applied in steel structures.Nonetheless,practical design methods for steel structures with viscous dampers remain to be further investigated due to ductile and damping characteristic of steel structures.A practical energy dissipation design method for steel structures based on ductility demand of viscous dampers is proposed in the paper.First,the ductility demand of viscous dampers and the number of dampers are determined based on the inter-story drift performance objectives and expected additional damping ratio.Then,examination of structural control effectiveness and optimization of viscous dampers layout are carried out.The paper presents two three-level design target instances to verify the validity the proposed energy dissipation design method in various steel structures.Results indicate that the damper provides a maximum force at 37.5%of the shear force.