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基于对钢结构箱形柱与梁异型节点形式及受力性能的分析,建立异型节点域的受剪计算模型,并推导节点域在压弯情况下的抗剪承载力计算公式。通过对箱形柱与工字梁和箱形梁异型节点模型的低周反复加载试验,研究轴压比和核心区高度对节点域抗剪承载力的影响,得到节点域的剪力-剪应变滞回曲线;从试验模型的滞回曲线可以看出,异型节点域以剪切变形为主,且具有良好的延性和抗剪承载能力。试验结果与计算分析表明,节点域在小核心区发生剪切屈服,提出的节点域抗剪承载力计算公式与试验结果比较吻合。
Based on the analysis of the forms and mechanical behaviors of steel box-shaped columns and beams, the shear model of shaped nodes is established, and the formulas for calculating the shear strength of joints under buckling are derived. The influence of axial compression ratio and core height on the shear strength of the joint was studied by low-cycle repeated loading tests on the box-shaped beam and the box girder shaped node model. The shear-shear strain Hysteresis curve. It can be seen from the hysteresis curve of the experimental model that the deformed node domain is dominated by shear deformation and has good ductility and shear bearing capacity. The test results and calculation results show that the shear strength of the node region occurs in the small core region. The calculation formula of the shear strength of the joint region proposed is in good agreement with the experimental result.