低周反复荷载作用下T形截面钢异形柱-钢梁节点抗震性能试验研究  

Experimental research on seismic behavior of steel specially shaped column with T-shaped section to steel beam connections under cyclic loading

作　　者：张爱林[1] 于劲[1,2] 李健 刘会军[3] 

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]北京市住宅建筑设计研究院有限公司,北京100005 [3]中国建筑设计研究院,北京100044

出　　处：《建筑结构学报》2011年第7期118-126,共9页Journal of Building Structures

基　　金：国家自然科学基金项目(50878008);北京市拔尖创新人才及创新团队项目(00400054R4901);北京工业大学城市与工程安全减灾教育部重点实验室;工程抗震与结构诊治北京市重点实验室项目

摘　　要：以强震区多高层钢结构框架的梁柱边节点为研究对象,通过3个足尺T形截面钢异形柱-钢梁节点试件在低周反复荷载作用下的拟静力试验,研究了试件的变形、应变分布、破坏模态,得到了试件的滞回曲线、骨架曲线、承载能力、节点域的剪切变形、转动能力、延性性能、耗能能力等抗震性能指标,分析了节点域强弱对抗震性能指标的影响。试验结果表明,T形截面钢异形柱-钢梁节点在破坏前经历充分的塑性变形,其破坏模态为局部屈曲破坏,塑性铰出现于远离梁柱焊缝的梁截面上且发展充分,有较高且稳定的承载能力,具备较好的塑性转动能力、延性性能和耗能能力,能够在强震区使用。研究为此类节点的工程应用和钢异形柱结构技术规程的编制提供依据。Quasi-static tests on three full-scale specially shaped columns with T-shaped section to steel beam connections were conducted under low cycle load reversals to study the behavior of exterior beam to column connections of multi-story or high rise buildings in high seismic regions.The deformation characteristics,strain distribution and the failure mode were investigated.The hysteretic loops,skeleton curves,bearing capacity,shear deformation of panel zone,rotation,ductility and energy-dissipation were obtained.The effect of the thickness of panel-zone was studied.Test results indicate that the steel specially shaped column with T-shaped section to steel beam connection has strong and stable bearing capacity,excellent plastic rotational performance,good ductility and energy-dissipation capacity.The typical failure mode is the local buckling with sufficient plastic deformation.The plastic hinge can be fully developed at the beam sections far away from the welds of the column-to-beam joint.Analysis result shows that steel specially shaped column with T-shaped section to steel beam connection can be used in regions of high seismicity.This study can provide background for practical engineering application and design specification for steel structures with specially shaped columns.

关 键 词：T形截面钢异形柱-钢梁节点 节点域厚度 拟静力试验 破坏模态 抗震性能 

分 类 号：TU392.1[建筑科学—结构工程]