新型扇形复合黏弹性阻尼器设计及数值分析
宋江良 , 牟志奇 , 李培振 , 孙杰 , 高攀 , 刘润杰 , 唐晓成
建筑钢结构进展 ›› 2026, Vol. 28 ›› Issue (9) : 1 -14.
新型扇形复合黏弹性阻尼器设计及数值分析
Design and Numerical Analysis of a Novel Sector Composite Viscoelastic Damper
为提高框架结构梁柱节点处的抗震性能,提出了一种适用于梁柱节点的新型扇形复合黏弹性阻尼器(sector composite viscoelastic damper,SCVD)。采用数值分析手段,研究了芯材材质(铅、LY100、LY160)、耗能棒数量、耗能棒直径、扇形钢板剪切位移角度、扇形钢板半径比等参数对SCVD耗能性能与阻尼特性的影响;并就有控和无控状态下的部分包覆钢-混凝土组合(partially encased composite structures of steel and concrete,简称PEC)框架开展滞回性能分析,探究了SCVD对PEC框架的减震效果。结果表明:SCVD的耗能效果与芯材屈服强度、耗能棒直径成正相关,与耗能棒数量、剪切位移角度成负相关;采用SCVD加固后的PEC框架,其承载力与变形能力得到显著提升;发生地震作用后,梁柱构件可基本保持完好,仅需更换SCVD即可恢复结构使用功能。SCVD的力学模型可采用双线性模型表征,计算结果与数值模拟结果吻合良好。
In order to improve the seismic performance of beam-column joints in frame structures, a novel sector composite viscoelastic damper (SCVD) is proposed for beam-column joints. The effects of core material (lead, LY100, and LY160), number and diameter of energy-dissipating rods, shear displacement angle of sector steel plate and radius ratio of sector steel plate on energy dissipation performance and damping characteristics of SCVD were investigated using numerical analysis. The hysteretic performance of partially encased composite (PEC) frames under controlled and non-controlled conditions was analyzed to evaluate the damping effect of SCVD on PEC frames. The results show that the energy dissipation capacity of SCVD is directly proportional to the core yield strength and the diameter of energy-dissipating rods, and inversely proportional to the number of energy-dissipation rods and the shear displacement angle. The bearing capacity and deformation capacity of PEC frame strengthened SCVD are significantly improved. After the earthquake, the beams and columns remain essentially intact, and the structural function can be restored by replacing only the SCVD. The mechanical behavior of SCVD can be described using a bilinear model, and the calculated results are in good agreement with numerical simulation results.
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国家自然科学基金(51978524)
吉林省住建厅建设科学技术计划项目(2023-K-25)
吉林省科技厅青年成长科技项目(20240602067RC)
吉林建筑大学博士科研启动项目(86133601)
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