新型全域屈服固接耗能钢棒阻尼器数值模拟及分析  

Numerical simulation and analysis of a new all sections yielding simultaneously energy-dissipating fixed steel bar damper

作　　者：陈晓桐[1] 叶茂[2] 杨琳怡 李炫 谢华[1] Chen Xiao-tong;Ye Mao;Yang Lin-yi;Li Xuan;Xie Hua(Guangxi Polyetchnic of Construction,Nanning 530007,China;Research Center of Wind Engineering and Engineering Vibration,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广西建设职业技术学院,广西南宁530007 [2]广州大学风工程与工程振动研究中心,广东广州510006

出　　处：《工程抗震与加固改造》2024年第4期128-136,共9页Earthquake Resistant Engineering and Retrofitting

基　　金：广州市基础研究计划(SL2022A03J00954);国家自然科学基金项目(51678169);广西高校中青年教师科研基础能力提升项目(2021KY1151)。

摘　　要：为改善现有金属阻尼器受力不均、延展性小、震后难以更换等问题,提出一种新型全域屈服耗能钢棒阻尼器,用于提高建筑结构的抗震性能。阻尼器采用耗能钢棒作为耗能元件,耗能钢棒经过截面设计后能实现全截面同时屈服,且方便震后更换。通过有限元数值模拟表明全域屈服耗能钢棒阻尼器滞回曲线饱满,耗能能力强,验证了全域耗能钢棒阻尼器设计合理性,可有效提升钢棒的耗能能力和延性性能,最后探究了钢棒半径、数量、长度对阻尼器力学性能的影响。分析结果表明:耗能钢棒能实现全截面屈服,滞回曲线饱满,性能稳定优越。耗能钢棒半径、长度、数量对阻尼器性能影响显著。阻尼器的耗能性能与钢棒半径、数量成正比,与钢棒长度成反比。In order to improve the problems of existing metal dampers,such as uneven force,low ductility,and difficulty in replacing them after earthquakes,an all sections yielding simultaneously energy dissipating steel bar damper is proposed to improve the seismic performance of building structures.The damper uses energy-dissipating steel bars as energy-consuming components.After the cross-section design,the energy-dissipating steel bars can achieve simultaneous yield of all sections,which can greatly improve the energy dissipation capacity and ductility performance of the steel bars,and facilitate post-earthquake replacement.Numerical simulations of the dampers were carried out using the finite element software ABAQUS to verify the design rationality of the dampers and to investigate the effect of the mechanical properties of the dampers on the radius,quantity and length of the steel rods.The results show that the new all sections yielding energy-dissipating steel bar damper is reasonably designed,with a full hysteresis curve and a strong energy dissipation capacity.The mechanical properties of the dampers are significantly influenced by the radius,quantity and length of the bars.The results show that the energy-dissipating fixed steel bar can realize full-section yielding,full hysteresis curve,and stable and superior performance.The radius,length and number of energy-consuming steel rods have significant effects on the performance of the damper.The energy dissipation performance of the damper is directly proportional to the radius and number of steel bars,and inversely proportional to the length of steel bars.

关 键 词：消能减震 耗能钢棒 金属阻尼器 抗震性能 

分 类 号：TU352.1[建筑科学—结构工程]