基于多模态控制的相邻结构减震性能研究  

Study on seismic performance of adjacent structures based on multi-modal control

作　　者：陈超起 高鹏 Chen Chaoqi;Gao Peng(Shenzhen Road&Bridge Construction Group Co.Ltd,Shenzhen 518000,China)

机构地区：[1]深圳市路桥建设集团有限公司,广东深圳518000

出　　处：《建筑科学》2023年第11期133-142,共10页Building Science

摘　　要：以结构的位移响应传递率为性能指标,推导同时连接金属阻尼器和粘滞阻尼器的两相邻单自由体系(2-sdof)的位移响应,并基于定点理论得出对应于不同金属阻尼量的最适粘滞阻尼参数公式。建立两相邻10层钢框架结构模型,提出将按照基于多模态控制得出的阻尼量向两相邻多质点体系(2-mdof)进行分配的方法,并根据布设方式的不同划分出多种工况。计算结构在两条地震动作用下对应不同工况的地震反应。结果表明:在两相邻结构之间附加按照基于模态分析的方法得出的阻尼量之后,能够充分发挥出金属阻尼器和粘滞阻尼器对位移和速度控制的双重性质,从而使得结构的地震反应得到大幅度降低。The structural displacement responses are deduced as metal dampers and viscous dampers being attached to the single-degree of freedom system(2-sdof)simultaneously.Then optimal viscous damping parameter formula is obtained corresponding to the different metal damping quantity based on the fixed point theory.A two adjacent 10 storey steel frame structural model is built and a method is proposed for the assignment of the derived damping quantities to the multi-degree of freedom system(2-mdof)based on the modal analysis method,and different working conditions are classified according to different damper assignment methods.The seismic responses of structures for different conditions are calculated under the action of two ground motions.The results show that:when the derived damping based on modal analysis is applied to the two adjacent structures,the dual properties for metal dampers to control displacements and viscous dampers to control velocities are fully functioned,therefore the seismic response of the structures are greatly reduced.

关 键 词：相邻结构 位移响应传递率 金属阻尼器 粘滞阻尼器 模态分析 

分 类 号：TU352[建筑科学—结构工程]