On Development of Design Method Allowing Buckling

为了发展允许弹性板屈曲的设计方法，有必要获得屈曲板的确切屈曲强度和极限强度的信息。首先，考虑板与加劲筋的相互作用，解析推导了双轴推力作用下连续加筋板局部屈曲强度的精确计算公式；还考虑了焊接残余应力和侧压力的影响。在这方面，讨论了什么是一个适当的模型，连续加强面板受到联合双轴推力和侧向压力。在此基础上，研究了加筋板局部屈曲后的破坏行为，推导了连续加筋板在推力作用下抗压极限强度的简化计算方法。在极限强度范围内的行为也进行了基于有限元分析结果的检验。最后，建立了简单的动力学模型来模拟连续加筋钢板达到或超过极限强度时的屈曲/塑性破坏行为。

For the development of design method allowing elastic panel buckling, it is necessary to get informations about the exact buckling strength and ultimate strength of the buckled panel.At first, formula to accurately evaluate local buckling strength of a continuous stiffened panel under bi-axial thrust was analytically derived considering the interaction between the panel and the stiffeners. Influences of welding residual stress and lateral pressure are also considered. In this connection, it was dicsussed what is an appropriate modelling for a continuous stiffened panel subjected to combined bi-axial thrust and lateralpressure.Then, the collapse behavior of stiffened panel after local buckling was examined and a simplified method was derived to evaluate the compressive ultimate strength of a continuous stiffened pane] under thrust. Be-haviour in the post-ultimate strength range was also examined based on the results of FEM analyses.At the end, simple dynamical models were developed to simulate buckling/plastic collapse behavior of continuous stiffened plating up to and beyond the ultimate strength.