摘要
为研究空间效应对节点域滞回性能及稳定性的影响,设计了4个不同构造的空间H形梁柱节点试件,于柱端施加恒定轴向荷载,于柱弱轴平面梁端施加恒定反对称荷载,于柱强轴平面梁端施加反对称往复荷载。试验及分析结果表明:基于平面梁柱节点试验提出的考虑竖向连接板对提高节点域稳定性的推荐公式仍适用;柱弱轴平面不平衡弯矩通过竖向连接板及横向加劲肋传递至柱翼缘,当该荷载不致引起节点域周边构件过早屈服时,若传力路径连续,节点域不直接抵抗该荷载作用;在本试验的柱弱轴平面荷载应力水平下,构造设计合理的空间试件节点域的承载力、变形能力、稳定性、耗能能力均不低于相应的平面试件。
In order to study the influence of spatial effect on panel zone hysteresis behavior and stability,four spatial H-shaped beam-column subassemblies with different connection details were designed and tested. The specimens were subjected to constant axial load and vertical loads on beams in two directions including anti-symmetric constant loads on beams perpendicular to column＇s weak axis and anti-symmetric cyclic loads on beams perpendicular to column＇s strong axis. The experimental results confirm that the recommended method based on the study of planar interior beamcolumn connections for evaluating the effect of vertical connecting plates on panel zone stability is still applicable. The unbalanced moments from the beams perpendicular to column＇s weak axis are transferred through vertical connecting plates and horizontal continuity plates,and finally carried by column flanges within the connection. If the load path is continuous and no premature yielding of elements surrounding the panel zone occurs,the panel zone will not resist the spatial loads directly. At the stress level adopted in this research,the performance of spatial specimens with reasonable constructional details is generally no worse than the corresponding planar ones in strength,deformation capacity,stability and energy dissipation capacity.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2015年第10期11-19,共9页
Journal of Building Structures
基金
国家自然科学基金重点项目(51038008)
关键词
钢框架
梁柱节点
节点域
空间加载
拟静力试验
滞回性能
稳定性
steel frame
beam-column connection
panel zone
spatial loading
quasi-static test
hysteretic behavior
stability
