薄壁钢结构屈曲验算方法

Calculation method for buckling of thin-walled steel structure

对欧洲现行钢结构规范中薄壁钢结构的屈曲(局部屈曲和整体屈曲)验算方法——有效宽度法与削减应力法进行了探讨研究,通过原理分析、数值模拟分析、有限元分析及实例数据对比,分析总结了两种方法的优点与不足,提出了一种新的屈曲验算方法。通过实例将此验算方法的计算结果与试验、计算机模拟以及按欧洲规范中现行方法计算的结果进行比较,验证了新验算方法的准确性与有效性。

According to the current European steel structure standards the calculation methods for local buckling and overall buckling instability,including effective width method and reduced stress method,were discussed.Through the principle analysis,numerical simulation analysis,finite element analysis,instance data comparison,the advantages and disadvantages of the two methods were summarized,and a new method had been proposed through theoretical deduction.Through an example,calculation data based on the new method were compared with the experimental data, computer simulation data as well as calculation results based on the exsiting methods in European standards to verify the accuracy and validity of the new method.