摘要
为研究屈曲约束钢框架与屈曲约束铰接钢框架两类不同结构形式钢框架的破坏机制和经济指标,通过对中、日、美框架结构设计规范的研究,以屈曲约束支撑水平力分担率β和结构首层剪重比C_b为主要研究参量,建立中国和美国结构形式多层屈曲约束支撑钢框架研究模型(CJ、US);通过弹塑性静力推覆分析,研究模型的层间位移与层剪力关系、塑性铰的形成规律、模型主体的用钢量与主要研究参量之间关系。研究发现:各中美结构形式模型的破坏机制均为整体结构破坏;CJ模型损伤向结构各层分布,而US模型有底部损伤集中趋势;框架用钢量与框架强度有关,但是与框架结构形式无关。
In order to analyze the failure mechanism and economic index of buckling restrained hinged steel frame and buckling restrained hinged steel frame with different structural forms.Through comparing design code in China,Japan,the United States,the key research parameters are BRB Participation Ratio(β)and BRB Shear-weight ratio of first floor(Cb),China and the United States structure buckling constraint support steel frame research model(CJ,US)were developed.Through elastic-plastic static pushover analysis,the relationship between the layer drift of the model and the story shear,the forming rule of plastic hinge,and the relationship between the amount of steel used and the main parameters of the model were analyzed.It is found that the failure mechanism of the structural form models in China and the United States is the whole structure failure.The damage of CJ model is distributed to all layers of the structure,while the US model has a centralized trend of bottom damage.The amount of steel used in the frame is related to the strength of the frame,but has nothing to do with the form of the frame structure.
作者
庾东
杨玉红
黄美玲
YU Dong;YANG Yuhong;HUANG Meiling(College of Civil Engineering and Architecture,Guilin University of Technology,Guilin,Guangxi 541004,China;College of Civil Engineering and Architecture,Nanning University,Nanning,Guangxi 530200,China)
出处
《水利与建筑工程学报》
2019年第2期200-205,共6页
Journal of Water Resources and Architectural Engineering
基金
桂林理工大学科研项目(2401003307)
广西自然科学基金资助项目(2018GXNSFBA138056)
国家自然科学基金项目(51868013)
关键词
钢框架
屈曲约束支撑水平力分担率
弹塑性静力推覆分析
steel frame
buckling restrained brace participation ratio
elastic-plastic static pushover analysis
