摘要
钢筋混凝土内填墙弥补了钢框架侧向刚度不足的缺点,为钢框架采用相对经济的半刚性节点提供了可能。为了研究半刚性节点钢框架内填钢筋混凝土剪力墙结构的滞回性能,在一榀循环加载模型试验的基础上,建立了非线性有限元模型,并验证了模型的有效性。考虑影响结构滞回性能的6个主要因素:节点刚度、剪力墙厚度、栓钉的设置、剪力墙的配筋、竖向荷载及混凝土强度等级,进行了6个系列22个有限元模型的变参数分析。结果表明:降低节点刚度有利于提高结构的延性和耗能能力;增加内填墙的厚度可提高结构的初始刚度和承载力;增加水平向栓钉的数量,采用普通混凝土以及合理设置暗柱、暗梁,能够有效地提高结构的整体性能,在此基础上提出了相关的抗震设计建议。
Reinforced concrete infill walls increase the lateral stiffness of steel frames, providing the opportunity to use partially-restrained connections. In order to study seismic behavior of the steel frame-reinforeed concrete infill walls, test on a two-story one bay specimen under cyclic load was conducted, along with the non-linear finite element analysis. Parametric analyses of 6 series and 22 finite element models were performed, in which 6 main influential factors including rotational stiffness of connections, width of infill walls, setup of headed studs, reinforcement ratios of infill walls, vertical loads from upper stories and compressive strength of concrete were considered. The analytical results indicate that reduction rotational stiffness of the connections, enhancement the width of infill walls, increasing numbers of horizontal headed studs, use general concrete and arranging reinforcement ratios of the concrete shear wall rationally would improve performance of the whole structure. Finally seismic design recommendations based on the results of exoeriment and finite element analysis are presented.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2009年第1期48-54,共7页
Journal of Building Structures
基金
国家自然科学基金资助项目(50378058)
山东省科技攻关计划项目(2007GG30010001
2008GG10007002)
关键词
钢框架
半刚性节点
钢筋混凝土内填墙
滞回性能
非线性有限元
steel frame
partially-restrained connection
reinforced concrete infill wall
seismic behavior
nonlinear finite element
