乔崎云, 杨兆源, 牟犇, 刘倩倩. 外环板式高低梁-方钢管柱节点弹塑性剪切承载力计算[J]. 工程力学, 2019, 36(8): 192-200,209. DOI: 10.6052/j.issn.1000-4750.2018.04.0228
引用本文: 乔崎云, 杨兆源, 牟犇, 刘倩倩. 外环板式高低梁-方钢管柱节点弹塑性剪切承载力计算[J]. 工程力学, 2019, 36(8): 192-200,209. DOI: 10.6052/j.issn.1000-4750.2018.04.0228
QIAO Qi-yun, YANG Zhao-yuan, MOU Ben, LIU Qian-qian. DESIGN METHOD ON PANEL-ZONE SHEAR BEHAVIOR OF CONNECTION BETWEEN SQUARE COLUMN AND H-SHAPED-STEEL UNEQUAL-DEPTH BEAM WITH EXTERNAL-DIAPHRAGM[J]. Engineering Mechanics, 2019, 36(8): 192-200,209. DOI: 10.6052/j.issn.1000-4750.2018.04.0228
Citation: QIAO Qi-yun, YANG Zhao-yuan, MOU Ben, LIU Qian-qian. DESIGN METHOD ON PANEL-ZONE SHEAR BEHAVIOR OF CONNECTION BETWEEN SQUARE COLUMN AND H-SHAPED-STEEL UNEQUAL-DEPTH BEAM WITH EXTERNAL-DIAPHRAGM[J]. Engineering Mechanics, 2019, 36(8): 192-200,209. DOI: 10.6052/j.issn.1000-4750.2018.04.0228

外环板式高低梁-方钢管柱节点弹塑性剪切承载力计算

DESIGN METHOD ON PANEL-ZONE SHEAR BEHAVIOR OF CONNECTION BETWEEN SQUARE COLUMN AND H-SHAPED-STEEL UNEQUAL-DEPTH BEAM WITH EXTERNAL-DIAPHRAGM

  • 摘要: 为研究外环板式高低梁-方钢管柱节点的弹塑性剪切承载力,对7个十字形外环板式高低梁-方钢管柱节点进行了低周往复加载试验。基于试验,建立了20个考虑不同参数影响的三维实体节点模型并对其进行了非线性有限元分析。结果表明:通过引入节点单侧最小柱梁强度比概念,可将该类节点的破坏模式分为节点区域整体剪切破坏及节点区域部分剪切破坏,且节点域两侧梁高比(db1/db2)、外环板尺寸以及钢管柱的宽厚比(D/t)等因素对节点剪切承载力产生影响。基于屈服线理论并结合试验及有限元分析结果,提出了外环板式高低梁-方钢管柱节点剪切承载力计算方法。该计算方法数据特征稳定,建议公式的结果与试验及仿真模拟结果吻合较好,能较精确地评估该类型节点的弹塑性剪切承载力,可供实际工程设计参考。

     

    Abstract: To evaluate the panel-zone shear behavior of a H-shaped steel unequal-depth beam-to-column connection with external-diaphragm, seven specimens are fabricated and tested under cyclic loading. Based on the test results, twenty three-dimensional solid models with different parameters are established, and the nonlinear finite element analysis has been carried out. The results show that the shear failure modes can be classified to an entire panel zone mode and a partial panel zone mode by introducing the concept of the minimum column-beam strength ratio of the connection. Moreover, the shear behavior of the panel zone is affected by various parameters, including beam depth ratio (db1/db2), the size of external diaphragms, and width-to-thickness ratio (D/t) of a steel column. Furthermore, based on the yield line theory, test results and numerical results, the design formulas on shear strength have been proposed and the calculated results show a good agreement with the test results and numerical results. The proposed formulas can evaluate the shear strength of the panel zone with adequate accuracy and be adopted in practical design.

     

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