王先铁, 贾子涵, 谢川东, 郭艺伟. 带开槽耗能板的自复位方钢管混凝土柱-钢梁节点抗震性能试验研究[J]. 工程力学, 2022, 39(9): 110-122. DOI: 10.6052/j.issn.1000-4750.2021.05.0360
引用本文: 王先铁, 贾子涵, 谢川东, 郭艺伟. 带开槽耗能板的自复位方钢管混凝土柱-钢梁节点抗震性能试验研究[J]. 工程力学, 2022, 39(9): 110-122. DOI: 10.6052/j.issn.1000-4750.2021.05.0360
WANG Xian-tie, JIA Zi-han, XIE Chuan-dong, GUO Yi-wei. EXPERIMENTAL STUDY ON SEISMIC BEHAVIOR OF SELF-CENTERING CONCRETE-FILLED SQUARE STEEL TUBULAR COLUMN-STEEL BEAM JOINTS WITH SLOTTED ENERGY DISSIPATION PLATES[J]. Engineering Mechanics, 2022, 39(9): 110-122. DOI: 10.6052/j.issn.1000-4750.2021.05.0360
Citation: WANG Xian-tie, JIA Zi-han, XIE Chuan-dong, GUO Yi-wei. EXPERIMENTAL STUDY ON SEISMIC BEHAVIOR OF SELF-CENTERING CONCRETE-FILLED SQUARE STEEL TUBULAR COLUMN-STEEL BEAM JOINTS WITH SLOTTED ENERGY DISSIPATION PLATES[J]. Engineering Mechanics, 2022, 39(9): 110-122. DOI: 10.6052/j.issn.1000-4750.2021.05.0360

带开槽耗能板的自复位方钢管混凝土柱-钢梁节点抗震性能试验研究

EXPERIMENTAL STUDY ON SEISMIC BEHAVIOR OF SELF-CENTERING CONCRETE-FILLED SQUARE STEEL TUBULAR COLUMN-STEEL BEAM JOINTS WITH SLOTTED ENERGY DISSIPATION PLATES

  • 摘要: 针对自复位节点复位阶段抗力大的问题,提出了带开槽耗能板的自复位方钢管混凝土柱-钢梁节点。为研究节点的抗震性能和自复位性能,对5个足尺梁柱节点试件进行低周往复荷载试验,对其受力性能进行理论分析,建立节点的恢复力模型。结果表明:带开槽耗能板的自复位节点具有良好的耗能能力、承载能力和自复位性能,滞回曲线呈典型的“双旗帜”形。4.00%位移角时节点残余变形较小,除耗能板外其余部件均保持弹性,震后更换耗能板即可快速修复。节点的自复位性能随耗能板单个板条宽度的增大而降低,耗能能力随单个板条宽度的增大而提高;耗能板厚度和宽度越大,节点的耗能能力和承载力越强,自复位能力越弱;钢绞线初始预应力对节点的承载力、初始刚度和自复位能力均有显著影响,但对节点耗能能力影响很小。恢复力模型与试验结果吻合较好。

     

    Abstract: In order to reduce the unloading resistance, a self-centering (SC) concrete-filled square steel tubular column and steel beam joint with slotted energy dissipation plates was designed. Low cyclic reversed loading tests of five full-scale joints were conducted to study the aseismic behavior. The mechanical properties were analyzed and the restoring force model was established. The results show that the self-centering joint with slotted energy dissipation plates has good bearing capacity, self-centering capacity and energy dissipation with the "double flag" shape hysteresis curve. The residual deformation is small under 4.00% drift, and the components remain elastic except energy dissipation plates which can be quickly repaired by replacing the plates. The wider the individual slat, the weaker the self-centering ability and the stronger the energy dissipation capability. The larger the width and thickness of the plates, the stronger the bearing and energy dissipation capacity, but the self-centering ability becomes weaker. The prestress of strands has significant influence on the initial stiffness, bearing capacity and self-centering ability, but has little influence on energy dissipation. The restoring force model agrees well with the experimental results.

     

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