高层建筑钢结构梁柱节点试验研究*
- 摘 要
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杨尉彪 (冶金部建筑研究总院 北京 100088)高小旺 张维嶽 易方民 王 巍 肖 伟 (中国建筑科学研究院 北京 100013)
[提要] 1994年美围Northridge地震和1995年日本阪神地震后,许多新型梁柱节点被提出,其中狗骨式节点是研究最多的一种节点形式。现结合实际工程对这种节点进行了试验研究,探讨了其在模拟地震荷载作用下的性能。试验结果表明,通过对节点附近梁上下翼缘进行合理的削弱可以增加节点的延性,同时对节点的刚度、强度影响很小,很好地改善了节点性能。在试验研究和数值计算的基础上提出了一种狗骨式节点设计方法。
[关键词] 高层钢结构 狗骨式节点 延性 强度 刚度
Since the 1994 Northridge carthquake and the 1995 Hanshcn carthquakc, a wide varicty of diffcrcnt momcnt conncctions have bccn dcvclopcd, the dog-bone conncction was a particularly popular momcnt conncction. Bascd on the cxpcrimcntal invcstigation of dog-bone connccrions of rcal structurc, the pcrformance of this kind of conncction undcr simulatcd carth-quake load is discusscd. The cxpcrimcntal rcsults show that, it can improve the pcrformance of conncction by trimming portions of the bcam flange ncar the bcam-column conncction with rcasonable dimcnsion, which can cnhance the ductility and have little influcnce on the stiffncss and the strcngth of conncction. Thcn a dcsign mcthod of dog-bone momcnt connccrions is put forward bascd on this cxpcrimcnt rcscarch and numcrical analysis.
Keywords: tall stccl structurc; dog-bone conncction; ductility; strcngth; stiffncss