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首页> 外文期刊>International journal of steel structures >Analysis on the shear capacity of irregular joints between steel box columns and beams
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Analysis on the shear capacity of irregular joints between steel box columns and beams

机译：钢箱柱与梁不规则节点的抗剪承载力分析

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摘要

According to an analysis of the mechanical behaviour of irregular joints between steel box columns and beams, the deformation mechanism of the steel irregular joint panel zone is established based on the plastic hinge theory. A formula for calculating the yield shear force of the panel zone is also proposed. Through analysis of strain and simplified calculation models of the panel zone of a steel irregular joint, the shear mechanism in the panel zone of the joint is studied. Based on the stress state in the panel zone, a simplified formula is presented for calculating the shear resistance of the steel irregular joint. Experimental and theoretical study results indicate that irregular joints between steel box columns and beams exhibit good seismic performance and energy dissipation capacity. Ductility is consistent with the requirements of plastic ultimate deformation; bearing capacity degradation of all specimens is not significantwhen the displacement of the layer exceeds the ultimate displacement. The experimental results indicate that shear buckling failure in the small core area of the panel zone is the main failure mode. Comparison of the experimental andtheoretical results show that only the shear capacity of a small core area needs to be examined if the strength of the panel zone has been ensured. Calculation results for the shear capacity are in agreement withto the test results.
机译：通过对钢箱柱与梁不规则节点的力学行为分析，基于塑性铰理论，建立了钢不规则节点面板区域的变形机理。还提出了计算面板区域屈服剪切力的公式。通过对钢不规则节点面板区域的应变分析和简化计算模型，研究了节点面板区域的剪切机理。根据面板区域的应力状态，给出了计算钢不规则节点抗剪强度的简化公式。实验和理论研究结果表明，钢箱柱与梁之间的不规则节理具有良好的抗震性能和耗能能力。延性符合塑性极限变形的要求；当层的位移超过极限位移时，所有试样的承载力降级并不明显。实验结果表明，板区小岩心区域的剪切屈曲破坏是主要的破坏模式。实验和理论结果的比较表明，如果已确保面板区域的强度，则仅需要检查较小芯区域的剪切能力。剪切能力的计算结果与试验结果一致。

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