中文摘要：

实际板壳结构中的初始缺陷会影响结构的安全性和稳定性.以某实际钢结构工程为研究背景,重点考虑初始缺陷的影响,研究了不同的缺陷大小、加劲形式、加载方式及边界条件下,加劲板的非线性稳定性情况.结果表明：对于四边简支板,板的厚度越小,缺陷的影响越明显;初始缺陷相同,扁钢的非线性应力值最大;单边加载状况下,初始缺陷对板的非线性稳定性影响较大;初始缺陷对四边简支和四边固结加劲板的影响较平稳.

英文摘要：

Initial imperfections in actual plate structures have impact on the structural stability and safety.Considering actual steel structures as a research background,with emphasis on the effect of initial imperfections,the nonlinear stability of stiffened plates was analyzed under the condition of different initial imperfection sizes,stiffener types,loading ways and boundaries.As for a simply supported plate,the thinner the plate,the more remarkable the influence of initial imperfections is.Considering the same initial imperfections,the nonlinear buckling value of flat steel is the largest.The influence of initial imperfections on the nonlinear stability of plates is large under uniaxial loading.Initial imperfections impact on a simply supported plate or a consolidated plate stable.