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过去30多年来,对现有钢结构设计方法的修正,使其能在结构设计中考虑到连接的半刚性性能。连接的初始转动强度对于结构整体的弹性分析很重要。采用有限元方法得到螺栓连接的平端板梁连接(BFEB)的初始转动刚度(IRS)参数结果。建模中考虑了材料特性、几何非连续性和大位移,同时进行试验分析,并与数值分析进行对比。这些模型显示:对于连接性能的研究,有限元建模与试验研究具有一致性。由于影响参数众多,基于EC3的分量法,提出BFEB连接性能的分析模型。此外,对弯矩-转动曲线的初始斜率进行了数值计算和数据的对比。同时对能准确评估BFEB的初始转动刚度的方法进行了讨论。
Over the past three decades, the modification of existing steel structure design methods has allowed them to take into account the semi-rigid nature of the connection in structural design. The initial rotational strength of the connection is important for the overall analysis of the elasticity of the structure. The initial rotational stiffness (IRS) parameters of the bolted flat-end beam connections (BFEB) were obtained using the finite element method. The material properties, geometrical discontinuities and large displacements are taken into account in the modeling. At the same time, the experimental analysis is carried out and compared with the numerical analysis. These models show that the finite element modeling is consistent with the experimental studies on the connection performance. Due to the large number of influential parameters, an analytical model of BFEB connection performance is proposed based on the EC3 component method. In addition, the initial slope of the moment-rotation curve is numerically calculated and compared with the data. At the same time, the method that can accurately evaluate the initial rotation stiffness of BFEB is discussed.