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在主次梁连接螺栓设计计算时,附加弯矩的力臂通常取次梁上螺栓群的形心到主梁腹板中心线的水平距离,这种附加弯矩的计算方法与实际受力状态不符。对实际钢结构工程中有代表性的主次梁高强螺栓连接节点进行承载力试验研究,探讨主次梁连接螺栓节点的屈服荷载、极限承载力和极限变形能力。同时,采用有限元软件对多种类型的主次梁高强螺栓连接形式的模型进行考虑接触单元的非线性分析,将试验结果、有限元计算结果与常规分析方法计算结果进行对比,提出主次梁连接螺栓承载力设计计算时更为合理的偏心距取值方法,计算结果与试验和有限元分析结果吻合良好。
When the primary and secondary beam connecting bolts are designed and calculated, the additional moment moment arm usually takes the horizontal distance from the centroid of the bollards on the beam to the centerline of the main beam web, and the calculation method of this additional moment does not accord with the actual force state . The bearing capacity of high-strength bolted joints of primary and secondary beams in the actual steel structure engineering is studied, and the yield load, ultimate bearing capacity and ultimate deformation capacity of connecting bolts of primary and secondary beams are discussed. At the same time, finite element software is used to analyze the non-linearity of contact elements of various types of primary and secondary girder high-strength bolt connection model. The experimental results, the finite element calculation results and the conventional analysis method are compared. The calculation method of the eccentricity distance is more reasonable when calculating the bearing capacity of the connecting bolt. The calculated results are in good agreement with the experimental results and the finite element analysis.