摘要
文章提出了单模态和多模态控制的调谐黏滞质量阻尼器(TVMD)跨层布置设计策略。该策略包括跨层布置、迭代优化和时程验证三个模块。在单模态控制策略中,基于结构相隔两质点一阶振型向量差,借助固定点优化方法确定TVMD的设计参数。在多模态控制策略中,首先利用振型参与质量系数筛选有效的设计模态,其后借助振型参与向量确定每个TVMD的设计控制模态,基于固定点方法拟定TVMD的设计参数。在迭代过程中,将三条设计地震动作用下的最大层间位移角作为更新每个TVMD振型质量比的性能指标。为了验证所提出的设计方法的可行性和有效性,利用FEMA-695中44条远场地震动分别对10层和20层benchmark模型进行时程分析。模拟结果表明,所提出的单模态控制策略适用于中低层结构的位移控制,多模态控制策略以较低的成本显著减小高层结构的位移和加速度响应。
In this paper,a single-modal and multi-modal control strategies are proposed to design the tuned viscous mass dampers(TVMD)across two consecutive stories arrangement.The strategies consist of three modules:across consecutive stories arrangement,iterative update,and time history validation.In the single-modal control strategy,the fixed-point optimal design formula is employed to approximate the design parameters of the TVMD with the differences in the first eigenvector of two consecutive masses.In the multi-modal control strategy,the modal participation mass factor is firstly used to screen the effective design modals.Next,the modal participation vector is employed to determine the control modal of each distributed TVMD.Then,the fixed-point method is carried out to approximate the design parameters of each TVMD.In the iterative part,the maximum story-drift angles obtained from three designed ground motions play the performance indicators for updating the modal mass ratio of each TVMD.In order to validate the feasibility and effectiveness of the proposed design method.The time history of 10-story and 20-story benchmark models was conducted by using 44 far-field ground motions selected from FEMA-695.The simulation results illustrate that the proposed single-modal strategy is suitable to control the displacement of low and median story structures,and the multi-modal control strategy is effective for the mitigation of displacement and acceleration responses of high story structures at a low cost.
作者
李大伟
袁琦
韩建平
白贺
Li Dawei;Yuan Qi;Han Jianping;Bai He(Lanzhuo University of Technology,Lanzhou 730050,China)
出处
《土木工程学报》
EI
CSCD
北大核心
2022年第S01期153-159,共7页
China Civil Engineering Journal
基金
国家自然科学基金(52108447)
教育部长江学者和创新团队发展计划(IRT_17R51)
关键词
惯容
调谐黏滞阻尼器
多模态迭代优化设计
单模态迭代优化设计
inerter
tuned viscous mass dampers
multi-modal iterative optimization design
single-modal iterative optimization design
