带悬臂梁段连接的装配式梁柱节点拟静力试验研究

Quasistatic test of assembled beamcolumn joints with cantilever connections

文中提出了一种适用于多层装配式钢框架结构体系的带悬臂梁段连接的装配式梁柱节点。考虑了连接件长度、加劲肋形式以及强弱轴连接,设计了4个带悬臂梁段连接的装配式梁柱节点,对该试件进行了拟静力试验,研究了其承载力、耗能特性、延性和刚度等滞回性能。通过拟静力试验研究发现:节点滞回曲线整体比较饱满,表明试件具有较强的塑性变形能力;与悬臂梁段单加劲肋试件相比,采用悬臂梁段双加劲肋,其抗震性能并没有得到明显改善;增大L型连接件竖板长度,对初始刚度影响不明显;采用悬臂梁段拼接节点弱轴连接方向,试件的刚度、承载力和延性系数都较强轴连接方向低。

In this paper,the assembled beam-column joint with cantilever segment is proposed for a multi-storey assembled steel frame structure.Four specimens of assembled beam-column joint with cantilever segment are designed with different details,including the length of connection,the type of stiffners and the strong or weak connections.The cyclic test is carried out to evaluate the bearing capacity,energy comsumption,duclitity,rigidity and other hysteretic properties.The test results reveal that the hysteretic curves are fairly full,and the plastic deformation of specimens is absolutely great as well,moreover,the seismic performance of the specimens with two stiffners detail is similar with the one stiffners,and the initial stiffness was not significantly affected by increasing the length of vertical plate of L-shaped element,in addition,the rigidty,bearing capacity and ductility factors of the weak connection are lower than the strong connection.