摘要
组合结构中填充墙对结构的强度、刚度及延性有显著的影响。在连续倒塌工况下框架和墙之间的相互作用直接影响组合结构的刚度和动态特性,在设计中直接忽略填充墙作用的方法并不经济、安全。提出一种简单方法,将填充墙等效为三支杆模型来估算砌体填充墙钢框架在角部压碎模式下的刚度、竖向承载力。通过已有的砌体填充墙钢框架失效的数据建立非线性简化模型,对此模型进行连续倒塌分析得到填充墙对组合结构刚度、动态特征的影响。研究表明填充墙能有效提高结构抗连续倒塌能力。
Masonry infill panels in frame structures have significant effects on strength,stiffness and ductility of the structure. The interaction between the panel and the frame in the process of progressive collapse dramatically changes the stiffness and the dynamic characteristics of the composite structure,hence ignoring the effect of infill wall is not always on the economic and safe side. This study presented a simple method for estimating the stiffness and vertical bearing capacity of masonry-infilled steel frames failing in corner crushing mode,in this method,each masonry panel could be replaced by three struts. A simplified model based on documented modes of failure of the masonry-infilled steel frames was proposed,so as to investigate the infill panel＇s influence on stiffness and the dynamic characteristics. The results showed that infill panels could effectively enhance the performance of structure to prevent progressive collapse.
出处
《钢结构》
北大核心
2016年第8期8-12,共5页
Steel Construction
基金
国家自然科学基金面上项目(51178259)
关键词
连续倒塌
填充墙
三支杆模型
构件拆除法
progressive collapse
infill panel
three-strut model
method of dismantling member
