新型金属-黏弹复合阻尼器力学模型与抗震性能研究  

Research on a Mechanical Model and the Seismic Performance of a New Metallic-Viscoelastic Hybrid Damper

作　　者：胡宝琳[1] 李斌[1] 胡吴彪 王长虹 孔祥琳 HU Baolin;LI Bin;HU Wubiao;WANG Changhong;KONG Xianglin(School of Mechanics and Engineering Science,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学力学与工程科学学院

出　　处：《建筑钢结构进展》2022年第11期34-46,共13页Progress in Steel Building Structures

基　　金：国家科技重大专项(2018ZX06001001);国家自然科学基金(51778355)。

摘　　要：为克服传统黏弹性阻尼器与金属阻尼器的不足,提出了新型金属-黏弹复合阻尼器(metallic-viscoelastic hybrid damper,MVHD),并对MVHD力学模型的滞回性能及应用进行研究,提出了MVHD的滞回曲线、刚度方程和数值计算方法。针对所提出的新型MVHD的构造特点,分析了耗能金属梁的长度、长高比、高厚比、加载频率和耗能占比等因素对新型MVHD性能的影响规律,为MVHD的优化设计提供依据。并通过将MVHD的理论公式计算结果与数值模拟结果进行对比,相互验证了其计算方法的准确性。采用简化的非线性力学模型,对一栋采用MVHD的5层钢筋混凝土结构的抗震性能进行了分析研究。结果表明,MVHD能有效地耗散地震能量,使框架结构的动力响应显著减小。对新型MVHD设计方法所作的系统研究可为类似工程提供参考。In order to overcome the shortcomings of traditional viscoelastic dampers and metal dampers,a new metallicviscoelastic hybrid damper(MVHD)is proposed in this paper. The hysteretic behavior and application of MVHD model are studied. The hysteretic curve,stiffness equation and numerical calculation method of MVHD are proposed.According to the construction characteristics of the new MVHD,the influence of the length,length-height ratio and height-thickness of metal beam,loading frequency and energy dissipation ratio of viscoelastic damper on the performance are analyzed,which provides a good understanding of the optimized design of MVHD. The accuracy of the calculation method is verified by comparing the theoretical formula of MVHD with the numerical simulation results. In this paper,the seismic performance of a five-story reinforced concrete structure with MVHD is analyzed using a simplified non-linear mechanical model. The results show that MVHD can effectively dissipate seismic energy and significantly reduce the dynamic response of the structure. This systematic research on MVHD design method can provide a reference for similar projects.

关 键 词：复合阻尼器 黏弹性橡胶 消能减震 力学性能 参数分析 

分 类 号：TU352.1[建筑科学—结构工程]