一种新型扭转金属阻尼器及其减震性能分析  

New torsional metal damper and analysis on its seismic control performance

作　　者：王德斌 白海峰 付兴 倪龙飞 Wang Debin;Bai Haifeng;Fu Xing;Ni Longfei(School of Civil Engineering,Dalian Jiaotong University,Dalian 116028,China;Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连交通大学土木工程学院,大连116028 [2]大连理工大学建设工程学部,大连116024

出　　处：《东南大学学报（自然科学版）》2022年第1期74-82,共9页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51738007);辽宁省教育厅科学研究资助项目(JDL2020011);大连市青年科技之星资助项目(2018RQ72).

摘　　要：为解决现有金属阻尼器应力分布不均匀的问题,设计了一种新型层间扭转型金属阻尼器,推导出初始刚度和屈服荷载表达式,并通过往复加载试验对其力学性能进行研究.根据阻尼器的试验过程建立有限元模型,分析其变形后的应力分布,对设有该扭转型耗能梁段与剪切型耗能梁段的Y形支撑结构进行了抗震性能研究.结果表明:建立的扭转金属阻尼器力学模型与试验结果基本吻合,从而验证了理论的正确性;设计的扭转型金属阻尼器具有良好的耗能能力,其屈服区域更加分散,应力、应变分布更加均匀;与剪切型耗能梁段相比,扭转型金属阻尼器减震效果更佳,中震、大震作用下结构层间位移角减震率均值分别提高2.7%和7.1%.To solve the problem of uneven stress distribution of existing metal dampers,a new interlayer torsion metal damper was designed,and the formulae of the initial stiffness and the yield load were derived.The mechanical properties of the proposed damper were investigated by cyclic loading tests.The finite element model of the damper was established according to the test process,and the strain distribution was analyzed.The seismic performance of a Y-shaped braced structure with the torsional energy dissipation beam section and the shear energy dissipation beam section was studied.The results show that the mechanical model of the torsional metal damper is consistent with the test results,proving the accuracy of the proposed theory.The designed damper has good energy dissipation capacity.The yield region is more dispersed,and the stress distribution and the strain distribution are more uniform.Compared with the shear energy dissipation beam section,the torsional damper has better seismic control effect.The average reduction ratios of the story drift under moderate and rare earthquakes increase by 2.7%and 7.1%,respectively.

关 键 词：扭转型金属阻尼器 滞回曲线 屈服荷载 层间位移角 抗震性能 

分 类 号：TU352.11[建筑科学—结构工程]