新型扇形盘式消能器减震性能参数分析
Seismic Performance and Parameters Analysis of a Novel Fan-shaped Disc Energy Dissipation Device

提出了一种新型扇形盘式效能器（fanshaped disc-type energy dissipator，FDED），阐明了其原理、特点，导出其设计要点和设计理论，采用数值方法分析了FDED的减震性能，研究不同设计参数对FDED减震性能的影响。结果表明：FDED设计原理可行，减震机理明确，其转盘式的构造可起到有效的位移放大效果，使得消能器在小激励位移下发挥耗能作用；FDED具有明显的双线性恢复力特性和稳定的耗能性能，等效黏滞阻尼系数可达50%以上；阻尼件中橡胶硬度的改变对FDED初始刚度的影响不敏感，但对FDED屈服后刚度和等效黏滞阻尼系数的影响较为明显。随着橡胶硬度的增大，FDEDE的屈服后刚度上升，等效黏滞阻尼系数降低；保持阻尼层中橡胶层的总厚度不变，通过增减叠层钢板改变单层橡胶层的厚度对于调整FDED的减震性能影响不大；调整铅芯直径的大小主要影响FDED的屈服力和耗能性能。随着铅芯直径的增大，FDED的屈服力也增大，耗能能力逐渐提高。
A novel fan-shaped disc energy dissipator (FDED) is proposed in this study. The working mechanism and characteristics of the FDED are illustrated, and its key points and theory of design are derived. The numerical method is used to analyze the seismic performance of the FDED and the influence of different design parameters on the performance of the FDED. Results show that the FDED has a feasible design principle and clear seismic performance. The fan-shaped construction enables the FDED to effectively amplify displacement. The FDED has a bilinear restoring force characteristic, stable energy dissipation performance, and an equivalent viscous damping coefficient that exceeds 50%. Although the change in rubber hardness is insensitive to the initial stiffness of the FDED, it influences the postyield stiffness and equivalent viscous damping coefficient of the FDED. Additionally, as rubber hardness increases, the postyield stiffness of the FDED increases, and the equivalent viscous damping coefficient decreases. The change in the thickness of the single rubber layer negligibly affects the seismic performance of the FDED. The yield force and energy dissipation performance of the FDED are mainly affected by lead-core diameter. Yield force increases and energy dissipation performance improves as lead diameter increases.