摘要
附加调谐质量阻尼器是烟囱结构的一种传统减震控制方法,然而其通常需要较大的附加质量及额外的安装空间,这为施工安装带来不便。本文提出附加调谐质量惯容系统(TMIS)控制高耸烟囱的地震响应,以利用惯容元件的表观质量效果实现轻量化减震目标。同时,考虑烟囱高阶模态对其地震响应不容忽视的影响,提出沿烟囱高度布置的分布式TMIS以实现多模态控制效果。建立了基于两种不同惯容子系统的TMIS力学模型及相应的附加分布式TMIS烟囱运动方程。以金井清谱为随机地震激励输入,并基于改进的定点理论提出了分布式TMIS的部分设计参数简化假设,提出了基于需求的分布式TMIS烟囱结构多模态优化设计方法。通过实例验证了所建议设计方法的有效性,并对比检验了分布式TMIS的轻量化及多模态控制效果,通过参数分析检验了所采用的改进定点理论简化的合理性。结果表明:所建议的设计方法可以按照预定目标发挥两种分布式TMIS的减震性能,两种分布式TMIS均显示了明显的轻量化减震效果。
The additional tuning mass damper is a traditional control technique for the chimney,but it usually requires a large addi-tional tuning mass and auxiliary installation space,which brings inconvenience to the construction and installation.This study pro-poses utilizing the additional tuned mass inerter system(TMIS)to reduce seismic responses of the chimney.The apparent mass ef-fect of the inerter is employed to achieve the goal of lightweight control.Meanwhile,considering that the influence of high-order modes of the high-rise chimney on its seismic responses cannot be ignored,the distributed TMISs arranged along the height of the chimney are proposed to achieve the multimode control effect.Mechanical models of the TMISs based on two different inerter sub-systems are established,and the equations of motion for the chimney with corresponding additional distributed TMISs are estab-lished.Taking Kanai-Tajimi’s spectrum as the random seismic excitation input and based on the extended fixed-point theory,the simplified assumptions for part of the design parameters of distributed TMISs are proposed.The demand-oriented multimode opti-mization design method for the chimney with distributed TMISs is presented.The effectiveness of the proposed design method is verified by a design case.The lightweight and multimode control effects of additional distributed TMISs are examined by compara-tive analyses.The rationality of the simplification based on the extended fixed-point theory is verified through parameter analysis.The results show that the proposed design method can achieve the expected target performance using the two distributed TMISs.Both the two distributed TMISs behave obvious lightweight control effect.
作者
张力
张瑞甫
薛松涛
谢丽宇
ZHANG Li;ZHANG Rui-fu;XUE Song-tao;XIE Li-yu(State Key Laboratory of Disaster Reduction in Civil Engineering,College of Civil Engineering,Tongji University,Shanghai 200092,China;Department of Disaster Mitigation for Structures,College of Civil Engineering,Tongji University,Shanghai 200092,China;Department of Architecture,Tohoku Institute of Technology,Sendai 982-8577,Japan)
出处
《振动工程学报》
EI
CSCD
北大核心
2024年第3期464-475,共12页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(51978525)
政府间国际科技创新合作重点专项(2021YFE0112200)
中国地震局地震工程与工程振动重点实验室重点专项(2020EEEVL0401,2019EEVL03)。
关键词
减震
惯容
烟囱
多模态控制
调谐
seismic reduction
inerter
chimney
multimode control
tune
作者简介
张力(1993-),男,博士研究生。电话:(021)65982390,E-mail:zhangli24@tongji.edu.cn;通讯作者:张瑞甫(1980-),男,博士,副教授。电话:(021)65983701,E-mail:zhangruifu@tongji.edu.cn。
