摘要
为研究柱脚刚接与柱脚铰接柱列支撑体系的不同受力性能和验证有限元方法分析该问题的可靠性,对带有不同初始几何缺陷分布的柱脚刚接与铰接柱列支撑体系进行了静力模型试验研究。研究结果表明:柱脚铰接柱列支撑体系的极限荷载和柱中水平撑杆内力均高于柱脚刚接柱列支撑体系,且前者较高的极限荷载更大幅度地增加了柱中水平撑杆内力;由于试验模型中柱和水平撑杆的初始几何缺陷的随机分布,柱中水平撑杆受压力或拉力的情况是随机的;柱列支撑体系的失稳破坏是由于单柱失稳破坏引发的。采用有限元模型对试验进行了模拟验证,计算结果与试验结果吻合良好。
In order to investigate the different mechanical behaviors of column-bracing systems with fixed-ended column base and pin-ended column base and verify the reliability of finite element analysis,static experimental studies were conducted on specimens with the two different column base connection types with different distributions of initial geometric imperfections.It is found that the ultimate load-carrying capacity and the bracing forces of the mid-height horizontal bracing bars of column-bracing systems with pin-ended column base are higher than those of column-bracing systems with fixed-ended column base,and the relative high ultimate load-carrying capacity of the former more significantly increases the bracing forces of the mid-height horizontal bracing bars.The mid-height horizontal bracing bars will be in compression or in tension depending on the distribution of the initial imperfection of both the columns and bracing bars.The buckling failure of column-bracing systems is caused by the buckling failure of individual column.Moreover,a finite element model is developed and verified against test results.The finite element analysis results agree well with the experimental data.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2011年第3期19-26,共8页
Journal of Building Structures
基金
国家自然科学基金项目(51008055)
中央高校基本科研业务费专项资金项目(DL09BB09)
中国博士后科学基金项目(20100471124)
关键词
柱列支撑体系
刚接柱脚
铰接柱脚
静力试验
有限元分析
初始几何缺陷
受力性能
column-bracing system
fixed-ended column base
pin-ended column base
static experiment
finite element analysis
initial imperfection
mechanical behavior
