箱形节点域连接的工字形柱钢框架抗震性能试验研究

发布时间：2018-04-25 13:10

本文选题：钢框架 + 工字形柱　；参考：《建筑结构学报》2016年07期

【摘要】：为研究采用箱形节点域与工形柱连接的钢框架结构的抗震性能,对由工字形柱强轴与弱轴方向采用箱形节点域连接的2榀钢框架结构进行了低周反复加载试验。试验结果表明:强轴连接钢框架具有较高的承载能力及良好的滞回性能,破坏时梁端出现塑性铰;弱轴连接钢框架的承载力相对偏低,但具有优于强轴连接钢框架的变形能力,且在弹塑性变形阶段具有与强轴连接钢框架相近的耗能能力,破坏模式与强轴连接基本相同;两榀钢框架的位移延性系数在2~3之间;试验中两榀钢框架的节点域始终处于弹性工作阶段,均未发生屈服。这表明箱形节点域连接属于"强节点域"连接,达到了"强节点弱构件"的抗震要求。箱形节点域连接可以有效减小节点域的剪切变形,采用该连接进行工字形柱钢框架设计时,在抗震设计中可以忽略节点域剪切变形对层间位移的影响。
[Abstract]:In order to study the seismic behavior of steel frame structures connected with box joints and I-columns, two steel frame structures connected by I-shaped columns in the strong axis and the weak axis in the box joint domain were subjected to low-cycle repeated loading tests. The test results show that the steel frame with strong shaft connection has high bearing capacity and good hysteretic performance, and plastic hinge appears at the end of the beam when failure occurs, and the bearing capacity of the steel frame with weak shaft connection is relatively low, but it is superior to the deformation ability of the steel frame with strong shaft connection. At the stage of elastic-plastic deformation, it has the same energy dissipation capacity as the steel frame with strong axial connection, and the failure mode is basically the same as that of the strong axial connection, and the displacement ductility coefficient of the two steel frames is between 2 and 3. In the test, the joint domain of the two steel frames is always in the elastic stage, and neither of them yield. This indicates that the box node domain connection belongs to the "strong node domain" connection and meets the seismic requirement of "strong joint and weak member". The box joint domain connection can effectively reduce the shear deformation in the joint domain. In the seismic design of I-shaped column steel frame, the influence of shear deformation in the joint domain on the interstory displacement can be ignored.
【作者单位】：长安大学建筑工程学院;
【基金】：国家自然科学基金项目(51278061)
【分类号】：TU391;TU352.11

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