新型钢框架梁柱T型节点抗震性能试验研究
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摘要
根据钢框架强柱弱梁的抗震设计原则,按照有效控制梁上塑性铰位置的思路,采用在梁腹板进行开孔削弱的节点形式,通过开孔位置与大小控制节点处的塑性铰形成位置,同时进行了反复荷载历程下的5组试件破坏试验,探讨了梁柱节点的滞回性能、节点破坏模式及其极限承载力,并进行对比分析.研究结果表明,采用腹板开孔的构造形式,可以大大缓解节点处的高三轴应力状态,使节点的破坏模式从脆性破坏转变为梁的局部屈曲破坏,降低了连接焊缝发生脆性破坏的可能性,很大程度地改善了节点延性性能.
According to the principles of antiseismic design of steel frames-strong columns and weak beams, based on the idea of controlling the position of plastic hinges of beams effectively, the node form weakened by holes on the web is adopted, and the position of plastic hinges is controlled by the position and size of the holes. At the same time, five groups of experiments under cyclic loading have been made until the specimens are destroyed. The hysteretic behavior of the node, the destruction pattern and the loading capacity of nodes are discussed. A contrastive analysis is made in addition. Results show that the structural form in which a hole is made on the web can alleviate the triaxial stress close to the node, change the destruction mode of the node from fragility damage to local buckling damage of the beam and reduce the possibility of fragility damage of the weld, thus improving the ductility performance of the node to a great extent.
According to the principles of antiseismic design of steel frames-strong columns and weak beams, based on the idea of controlling the position of plastic hinges of beams effectively, the node form weakened by holes on the web is adopted, and the position of plastic hinges is controlled by the position and size of the holes. At the same time, five groups of experiments under cyclic loading have been made until the specimens are destroyed. The hysteretic behavior of the node, the destruction pattern and the loading capacity of nodes are discussed. A contrastive analysis is made in addition. Results show that the structural form in which a hole is made on the web can alleviate the triaxial stress close to the node, change the destruction mode of the node from fragility damage to local buckling damage of the beam and reduce the possibility of fragility damage of the weld, thus improving the ductility performance of the node to a great extent.
引文
[1] ChiaMingUang,Chao-ChinFan.CycliCStabilityCriteriaforSteelMomentConnectionswithReducedBeamSection[J].JournalofStructuralEngineering,2001,127(9):1021-1027.
[2] ShengJinChen,TsaoYC,ChaoYC.EnhancementofDuctilityofExistingSeismicSteelMomentConnections[J].JournalofStructuralEngineering,2001,127(5):538-545.
[3] DanDubina,AdrianCiutina,AurelStratan.CyclicTestsofDouble-SidedBeam-tO-ColumnJoints[J].JournalofStructuralEngineering,2000,127(2):129-136.
[4] 宋振森,顾强,郭兵.刚性钢框架梁柱连接试验研究[j].建筑结构学报,2001,22(1):53-56.
[5] 王秀丽,沈世钊,朱彦鹏.轻型钢管拱型屋面的优化设计[J].建筑结构,2001,32(7):60-62.
[6] 石永久,李兆凡,陈宏,等.高层钢框架新型梁柱节点抗震性能试验研究[J].建筑结构学报,2002,23(3):2-7.
[7] 杨尉彪,高小旺,易方民,等.高层建筑结构梁柱节点试验研究[J].建筑结构,2001,3l(8):3-8.
[8] 王秀丽,梁亚雄.反复荷载作用下多层轻钢框架梁柱节点抗震性能的实验研究[J].工业建筑,2003,增刊:725-730.
[9] 王秀丽,沈世钊.轻钢结构在房屋增层改造中的应用[J].兰州理工大学学报,2004,30(1):97-100.
[10] 姚国春,霍立兴,张玉凤,等.焊接钢结构梁柱节点地震下的断裂行为研究[J].钢结构,2000,15(50):25-27.
[2] ShengJinChen,TsaoYC,ChaoYC.EnhancementofDuctilityofExistingSeismicSteelMomentConnections[J].JournalofStructuralEngineering,2001,127(5):538-545.
[3] DanDubina,AdrianCiutina,AurelStratan.CyclicTestsofDouble-SidedBeam-tO-ColumnJoints[J].JournalofStructuralEngineering,2000,127(2):129-136.
[4] 宋振森,顾强,郭兵.刚性钢框架梁柱连接试验研究[j].建筑结构学报,2001,22(1):53-56.
[5] 王秀丽,沈世钊,朱彦鹏.轻型钢管拱型屋面的优化设计[J].建筑结构,2001,32(7):60-62.
[6] 石永久,李兆凡,陈宏,等.高层钢框架新型梁柱节点抗震性能试验研究[J].建筑结构学报,2002,23(3):2-7.
[7] 杨尉彪,高小旺,易方民,等.高层建筑结构梁柱节点试验研究[J].建筑结构,2001,3l(8):3-8.
[8] 王秀丽,梁亚雄.反复荷载作用下多层轻钢框架梁柱节点抗震性能的实验研究[J].工业建筑,2003,增刊:725-730.
[9] 王秀丽,沈世钊.轻钢结构在房屋增层改造中的应用[J].兰州理工大学学报,2004,30(1):97-100.
[10] 姚国春,霍立兴,张玉凤,等.焊接钢结构梁柱节点地震下的断裂行为研究[J].钢结构,2000,15(50):25-27.
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