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为研究纵向无约束、加载端简支(截面内置单元)的短圆柱形曲板的后屈曲性能,对平面内压弯作用下圆柱形曲板进行了数值分析,包括曲率和载荷类型(纯压缩和平面内弯曲)的影响。研究确定了其他相关参数以及它们对圆柱形曲板极限强度的影响。通过参数研究得到极限折减系数的数值分析结果,利用迭代程序将其转换成几何(宽度)折减系数。随后,基于有效宽度的概念,对EN1993-1-5中内置板构件极限承载力的计算准则进行改进。结果表明(短粗板除外):随着曲率参数的增大,圆柱形曲板的承载力提高,EN 1993-1-5给出的承载力上限是合理的。最后,统计研究结果表明,该方法能够准确估计圆柱形曲板的极限承载力。
In order to study the post-buckling performance of a short cylindrical curved plate with longitudinal restraint and simple supported load (cross-section built-in elements), the numerical analysis of the cylindrical curved plate subjected to in-plane bending is performed, including the curvature and load type And in-plane bending). The study determined other relevant parameters and their effect on the ultimate strength of the cylindrical plate. The results of the numerical analysis of the ultimate reduction factor are obtained through parametric studies, which are converted into geometric (width) reduction coefficients using an iterative procedure. Then, based on the concept of effective width, the calculation criterion of the ultimate bearing capacity of built-in plate members in EN1993-1-5 is improved. The results show that (except for the stubby boards): As the curvature parameters increase, the bearing capacity of the cylindrical curved board increases, and the upper limit of the bearing capacity given by EN 1993-1-5 is reasonable. Finally, the statistical results show that this method can accurately estimate the ultimate bearing capacity of cylindrical curved plate.