黏滞阻尼减震框架结构基于预设阻尼分布模式的简化设计方法
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摘要
提出了一种适用于黏滞阻尼减震框架结构基于性能需求和概念优化的设计方法以简化此类减震结构的阻尼参数设计过程。为使得阻尼器能够更有效发挥其耗能作用,从概念角度假定阻尼参数沿楼层的分布与结构层间位移角成正相关的关系,并给出了阻尼参数的分布表达式。在此预设阻尼分布模式下,推导了多层减震结构等效附加阻尼比与各层附加阻尼参数的关系。结合基于性能的设计理念,提出以减震比作为减震设计目标,减震结构的需求附加阻尼比可根据减震比和抗震设计反应谱的阻尼衰减关系来确定,结合预设阻尼参数分布表达式即可快速计算出各层的需求阻尼参数。给出了所提出方法的具体实施流程,并对一个框架结构进行了增设黏滞阻尼器的减震设计和抗震性能验算,设计实例表明该方法具有设计目标明确、计算过程简单、参数配置合理等特点。
A design method based on performance requirements and conceptual optimization for viscous damping frame structures was proposed to simplify the design process of damping parameters of such damping structures. In order to make energy dissipation of the damper more effectively, it was assumed conceptually that the distribution of damping parameters along the floor is positively correlated with the story drift angle, and the distribution expression of damping parameters was given. Under this preset damping distribution model, the relationship between the equivalent additional damping ratio of multi-story damping structure and the additional damping parameters of each layer was derived. Combined with the performance-based design concept, it was proposed that the damping ratio is taken as the damping design goal, and the required additional damping ratio of the damping structure can be determined according to the relationship between the damping ratio and the damping attenuation of the seismic design response spectrum. Combined with the distribution expression of preset damping parameters, the required damping parameters of each layer can be calculated quickly.The damping design and seismic performance checking calculation of a frame structure with viscous dampers were carried out. It was shown by the design example that the method has clear design goal, simple calculation process and reasonable parameter configuration.
A design method based on performance requirements and conceptual optimization for viscous damping frame structures was proposed to simplify the design process of damping parameters of such damping structures. In order to make energy dissipation of the damper more effectively, it was assumed conceptually that the distribution of damping parameters along the floor is positively correlated with the story drift angle, and the distribution expression of damping parameters was given. Under this preset damping distribution model, the relationship between the equivalent additional damping ratio of multi-story damping structure and the additional damping parameters of each layer was derived. Combined with the performance-based design concept, it was proposed that the damping ratio is taken as the damping design goal, and the required additional damping ratio of the damping structure can be determined according to the relationship between the damping ratio and the damping attenuation of the seismic design response spectrum. Combined with the distribution expression of preset damping parameters, the required damping parameters of each layer can be calculated quickly.The damping design and seismic performance checking calculation of a frame structure with viscous dampers were carried out. It was shown by the design example that the method has clear design goal, simple calculation process and reasonable parameter configuration.
引文
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[2] KASAI K,OOHARA K,SEKIGUCHI Y.JSSI manual for building passive control technology:part-11 time-history analysis model for viscous dampers[C].Proceeding of 13th World Conference on earthquake Engineering,No.1427,August,Vancouver,Canada,2004.
[3] 郑久建,唐曹明,刘雪.消能减震结构的试算设计方法[J].建筑科学,2011,27(3):5-8.ZHENG Jiujian,TANG Caoming,LIU Xue.Trying-parameter design procedure of seismic design with supplemental energy dissipation Devices[J].Building Science,2011,27(3):5-8.
[4] 翁大根,张超,吕西林,等.附加黏滞阻尼器减震结构实用设计方法研究[J].振动与冲击,2012,31(21):80-88.WENG Dagen,ZHANG Chao,Lü Xilin,et al.Practical design procedure for a energy-dissipated structure with viscous dampers[J].Journal of Vibration and Shock,2012,31(21):80-88.
[5] 裴星洙,韩露.高层钢框架结构附加黏滞阻尼器的简易设计方法研究[J].世界地震工程,2015,31(2):52-62.PEI Xingzhu,HAN Lu.Simple and easy design method of viscous dampers set on highrise steel frame structure[J].World Earthquake Engineering,2015,31(2):52-62.
[6] 黄永福,徐艳,李建中.近断层地震作用下斜拉桥黏滞阻尼器参数简化设计方法[J].土木工程学报,2016,49(9):72-77.HUANG Yongfu,XU Yan,LI Jianzhong.Simplified parameter design method of viscous dampers for cable-stayed bridge under near-fault ground motions[J].China Civil Engineering Journal,2016,49(9):72-77.
[7] 兰香,潘文,况浩伟,等.基于层间位移利用率法修正消能减震结构的附加阻尼[J].振动与冲击,2017,36(20):64-71.LAN Xiang,PAN Wen,KUANG Haowei,et al.Correction additional damping of an energy-dissipation structure based on a story drifts utilization ratio method[J].Journal of Vibration and Shock,2017,36(20):64-71.
[8] 中华人民共和国住房和城乡建设部.GB 50011—2010 建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[9] CHOPRA A K.Dynamics of structures:theory and applications to earthquake engineering (3 ed)[M].New Jersey USA:Prentice Hall PTR,2006:1-812.
[10] 潘超,张瑞甫.EQSignal:地震波处理与生成工具[CP/OL].www.eqsignal.com.
[11] PAN C,ZHANG R,LUO H,et al.Target-based algorithm for baseline correction of inconsistent vibration signals[J].Journal of Vibration and Control,2017,24(12):2562 -2575.