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对多螺栓连接薄壁板件的抗剪性能进行了数值分析。采用有限元模型对一系列复杂的参数进行分析,研究不同的设计参数对连接板件性能(包括初始刚度、极限承载力以及极限承载力状态下的最大挠度)的影响。设计参数包括:边界条件、约束条件、螺栓间距、沿加载方向和垂直于加载方向的螺栓数量以及钢材的断裂伸长率限值。结果表明:现有计算刚度和极限承载力的方法是可行的。研究重点在于极限状态下板件最大挠度。基于参数分析结果,发现了不同失效模式下螺栓孔周边的应变分布,表明作者所提出的单螺栓连接板件的应变分布仍然适用,但需要修改板件的尺寸范围,包括用于辨识不同螺栓排列下失效模式差异的应变分布。
The numerical analysis of the shear resistance of multi-bolt thin-walled plate is carried out. A series of complex parameters were analyzed by using the finite element model to study the influence of different design parameters on the performance of the connection plate, including the initial stiffness, the ultimate bearing capacity and the maximum deflection under the ultimate bearing capacity. Design parameters include: boundary conditions, constraints, bolt spacing, number of bolts along the loading direction and perpendicular to the loading direction, and elongation at break of the steel. The results show that the existing methods for calculating the stiffness and ultimate bearing capacity are feasible. The research focus is on the maximum deflection of the plate under extreme conditions. Based on the results of parameter analysis, the strain distribution around the bolt holes under different failure modes was found, which indicates that the strain distribution of the single-bolt connecting plate pieces proposed by the author is still applicable. However, it is necessary to modify the size range of the plate pieces, Strain distribution under failure mode difference.