复式钢管混凝土柱-钢梁节点累积耗能性能研究  

Research on cumulative energy dissipation for connections of concrete-filled double skin steel tubular columns with steel beams

作　　者：张冬芳[1] 赵均海[1] 张常光[1] 张玉芬[2] 

机构地区：[1]长安大学建筑工程学院,陕西西安710061 [2]北方工业大学建筑工程学院,北京100041

出　　处：《世界地震工程》2017年第1期59-68,共10页World Earthquake Engineering

基　　金：国家自然科学基金项目(51508028);中国博士后科学基金项目(2014M562357;2015M580803);陕西省博士后科研项目;中央高校基本科研业务费专项资金资助(310828151068)

摘　　要：为研究外方内圆复式钢管混凝土柱-钢梁节点的累积耗能性能,对6个组合节点试件和1个方钢管混凝土柱-钢梁节点对比试件进行了低周往复荷载作用下的试验研究和参数分析,探讨了节点的各项耗能指标及影响参数。结果表明:此类组合节点试件具有良好的滞回耗能能力,其中锚固腹板加肋和竖向肋板外伸长度120mm的节点试件累积耗能能力较好,且累积损伤对节点滞回耗能影响不明显;其余节点试件的梁端位移角达到1/23时,试件开始有累积损伤,滞回耗能下降幅度不超过10%,累积损伤对其影响不严重;复式钢管混凝土柱-钢梁节点的累积耗能各项指标均优于方钢管混凝土柱-钢梁节点;节点试件的累积耗能随着梁柱弯矩比的增大而有所提高,随竖向肋板外伸长度和梁柱线刚度比的增大也有所提高,但有一定限值。Six connections of concrete-filled double skin steel tubular （CFDST） columns with steel beams and one connection of concrete-filled steel tubular （CFST） columns with steel beams were tested and analysed under the lateral cyclic loads, to evaluate the cumulative energy-dissipation performance. The indexes of energy-dissipation and influence factors were studied. The results show that the hysteretic energy-dissipation of the specimens is stable and sufficient. And the cumulative energy-dissipation for the connection of anchorage webs with ribs and overhang length I20mm of vertical rib plates was better. And the effects of cumulative damage on the energy absorption of the connection were not obvious. At the drift ratio of 1/23, the other specimens experienced cumulative damage to which the extent was not significantly severe, and hysteretic energy dissipation decreased less than 10%. The indexes of cumulative energy-dissipation for the connections of CFDST columns with steel beams were much better than that of the connections of CFST columns with steel beams. The cumulative energy-dissipation of the specimens increased with the increasing of the bending moment ratio. And it also increased with the increasing of the overhang length of vertical rib plates and the linear stiffness ratio of beam-column, but there was a certain limit.

关 键 词：复式钢管混凝土柱-钢梁节点 累积耗能 累积塑性变形率 累积损伤 参数分析 

分 类 号：TU398.9[建筑科学—结构工程]