带填充墙的悬臂梁拼接钢框架抗震性能研究  

Study on seismic behavior of infilled-steel frame with cantilever beam bolted-splicing

作　　者：夏军武[1,2] 徐博[1] 张海威[1] 路振花 

机构地区：[1]中国矿业大学力学与建筑工程学院,江苏徐州221116 [2]江苏建筑节能与建造技术协同创新中心,江苏徐州221116

出　　处：《建筑结构学报》2016年第11期113-120,共8页Journal of Building Structures

基　　金：国家自然科学基金项目(51274192);江苏建筑节能与建造技术协同创新中心开放基金项目(SJXTY1609)

摘　　要：为研究悬臂梁段拼接节点对带填充墙钢框架的抗震性能影响,进行了一榀1/2缩尺带砌体填充墙的悬臂梁拼接钢框架的拟静力试验,并进行了ANSYS有限元验证及参数分析。对结构的全阶段加载的破坏模式、应变变化、滞回曲线、位移延性、骨架曲线、割线刚度及其退化规律和等效黏滞阻尼比等进行分析。试验结果表明:该结构的承载力为183 k N,极限位移为11 mm,位移延性系数为1.88,具有良好的承载能力和位移延性;填充墙先于拼接节点发生破坏,在加载过程中对节点具有保护作用;结构的滞回性能良好,其割线刚度没有发生明显退化。有限元分析结果表明:墙体厚度和框架跨度的改变对结构耗能能力均有不同程度的影响,而框架层高的改变对结构耗能能力影响不明显。In order to study the effect of spliced joint of cantilever beam on seismic performance of steel frame with infill wall, low cycle reversed loading experiment on a 1/2 scaled model of infilled-steel frame with cantilever beam bohed-splicing was conducted, and the finite element analysis and parametric analysis using ANSYS were carried out. The energy dissipation characteristic of the whole stage loading were analyzed in terms of the failure mode, strain variation, bysteretic characteristics, displacement ductility, skeleton curve, secant stiffness and its deterioration and equivalent damping ratio. Experimental results indicate that the specimen has a load carrying capacity of 183 kN and a limit displacement value of 11 mm, resulting in the displacement ductility coefficient of 1.88. The failure of infilling wall is prior to that of the spliced joint, which provides the energy dissipation protection for joints in the process of loading. The test specimen has an excellent performance in hysteretic behavior. The secant stiffness of specimen have no obvious degradation. The finite element analysis demonstrates that the change of wall thickness and span length respectively has a certain extent effect on the energy dissipation capacity of the structure, but the layer height change has no significant effect on its energy dissipation performance.

关 键 词：填充墙钢框架 悬臂梁段拼接 拟静力试验 有限元分析 抗震性能 

分 类 号：TU398.903[建筑科学—结构工程]