框架-BRB结构考虑弯曲型变形的抗侧刚度及设计参数  

Calculation of Inter-story Stiffness and Relative Design Parameters in Frame With BRB Considering Flexural Deformation

作　　者：李建勤[1] 高向宇[1] 刘超[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100124

出　　处：《北京工业大学学报》2015年第3期403-411,共9页Journal of Beijing University of Technology

基　　金："十二五"国家科技支撑计划资助项目(2011BAJ08B03-4);国家自然科学基金资助项目(50678013;51378038)

摘　　要：由于目前框架-BRB结构设计方法是基于结构层间位移全部由楼层剪切型变形造成,忽视了结构弯曲型变形的影响.为了准确计算防屈曲支撑提供的层间抗侧刚度,在现有层间剪切模型分析方法基础上,讨论结构弯曲型变形对框架-BRB结构影响规律.提出考虑结构弯曲变形下的层间抗侧刚度计算公式,并通过有限元方法验证.提出了抗侧刚度变化系数,考虑结构在弯曲型变形下BRB的相关设计参数的计算,抗侧刚度变化系数可应用在等效线性化设计方法中.Traditional design method of FBRB（ frame with buckling-restrained braces） which only considered inter-story shear deformation,ignoring flexural deformation of FBRB,did not conform to the deformation characteristic of FBRB. For accurately calculating the inter-story lateral stiffness,the authors presented formulas to calculate inter-story stiffness of BRB and the stiffness adjusting coefficient,considering flexural deformation and basing inter-story shear deformation model. Some design parameters of BRB were discussed under considering flexural deformation,and these parameters could be used in equivalent linearization method.

关 键 词：结构工程 防屈曲支撑 弯曲型变形 层间抗侧刚度 

分 类 号：TU352.1[建筑科学—结构工程]