摘要
高烈度地区结构设计常遇到通常会遇到竖向构件抗剪不满足、超筋、层间位移角大于规范限值等问题。近年,增设消能阻尼器的减震技术常被用来解决该问题,如通过将阻尼器在各层各向上均匀布置。阻尼器的空间分布对减震效率的影响暂未受到足够的关注,即使少数研究者已采用遗传算法等智能算法进行尝试,并得到了针对某种参数最优的布置方案。但可供优化的目标众多,且多目标优化的实现暂不成熟;另,算法的落地还需要将结构进行简化,这将建筑脱离出其应具备的功能属性。这些因素都对搜索阻尼器的空间最优布置提出了挑战。合理的阻尼器空间布置能充分发挥阻尼器的作用,最大化减震效率亟待探索。基于此,本文提出框剪结构黏滞阻尼器可按各层各向水平地震作用下的层间位移角量值进行数量分配,宜远离或贴近结构平面形心并于柱跨内1/2处布置,该法实践性强且极大程度发挥减震效率。
In high-intensity seismic areas,the design of structures often encounters problems such as insufficient shear capability of vertical members,excessive reinforcement and inter-story drift angle.In recent years,the addition of dampers as a seismic reduction technology has been commonly used to solve these problems,by uniformly distributing dampers on each floor and in each direction.However,the impact of the spatial arrangement of dampers on the effectiveness of seismic reduction has not received sufficient attention.Although a small number of researchers have attempted to use intelligent algorithms such as genetic algorithms to obtain the optimal layout for certain parameters,there are many optimization targets available,and the implementation of multi-objective optimization is not yet mature.Additionally,the simplification of the structure required for algorithm implementation may compromise its intended functionality.These factors present a challenge in the search for the optimal spatial arrangement of dampers,thus a reasonable layout of dampers can fully utilize their effectiveness and maximize the seismic reduction efficiency.This paper proposes that dampers should be allocated according to the inter-story drift angle values in each direction,and should be located away from orcloseto the centroid and placed at 1/2 the column span,which is practical and maximizes the effectiveness of seismic reduction.
作者
卢云军
曾弘毅
杨学林
胡世强
陈伟伟
LU Yunjun;ZENG Hongyi;YANG Xuelin;HU Shiqiang;CHEN Weiwei(Zhejiang Province Institute of Architectural Design and Research,Hangzhou 300014,China)
出处
《建筑结构》
北大核心
2023年第S02期839-845,共7页
Building Structure
基金
浙江省建筑设计研究院科研项目(2021K10):高烈度区建筑结构基于性能的消能减震设计方法与工程实践。
关键词
消能减震
黏滞阻尼
阻尼器优化布置
减震效率
energy dissipation and shock absorption
viscous damping
optimized arrangement of dampers
buckling restrained brace
shock absorption efficiency
