组合剪力连接件的抗拉承载力有限元分析

摘要:

为研究组合剪力连接件在PBL高度,贯通钢筋直径,孔径大小,栓钉直径对抗拉承载力和荷载-滑移曲线的影响,使用有限元软件ABAQUS建立组合剪力键模型,通过现有试验对比验证可行性并进行参数化分析。结果表明：增加PBL高度、贯通钢筋直径、开孔孔径、栓钉直径能提高抗拉承载力。其中,增加PBL高度对抗拉承载力的增幅效果并不显著；开孔孔径与承载力之间并不是呈线性增长关系；当贯通钢筋直径从12mm增加至16mm时,构件的承载力有了显著提升；栓钉直径提升至16mm时,构件的极限承载力明显增大；根据叠加原理,建立了组合剪力连接件抗拉承载力计算公式,计算值与数值模拟结果吻合度较高。

Abstract:

In order to study the effect of the combined shear connectors at the height of the PBL, the diameter of the penetrating steel bar, the size of the hole diameter, and the diameter of the stud on the tensile bearing capacity and the load-slip curve, the finite element software ABAQUS was used to establish the combined shear key model and passed the existing tests. Compare and verify the feasibility and carry out parametric analysis. The results show that increasing the PBL height, the diameter of the penetrating steel bar, the hole diameter, and the stud diameter can improve the tensile bearing capacity. Among them, the effect of increasing the height of the PBL to increase the tensile bearing capacity is not significant; the relationship between the hole diameter and the bearing capacity is not linear; when the diameter of the penetrating steel bar increases from 12mm to 16mm, the bearing capacity of the component has been significantly improved When the stud diameter is increased to 16mm, the ultimate bearing capacity of the component is obviously increased; according to the superposition principle, the calculation formula for the tensile bearing capacity of the combined shear connectors is established, and the calculated value is in good agreement with the numerical simulation result.