考虑纵向加劲肋局部缺陷的组合箱梁下翼缘板弹性屈曲分析

陈 齐风, 宁 杰钧, 骆 俊晖, 郝 天之
广西北投交通养护科技集团有限公司

摘要

本文主要讨论了带有加劲肋初始局部缺陷板件的弹性屈曲分析。采用有有限元计算软件ANSYS进行数值模
拟，通过建立不同缺陷参数的加劲板件计算模型，分析了加劲肋局部缺陷数量与尺寸对组合箱梁下翼缘板件临界屈
曲应力系数的影响。结果显示，加劲肋局部缺陷的数量增多、尺寸增大均会导致临界屈曲应力系数下降。本文的研
究成果对带加劲肋板件的局部缺陷分析与加劲肋设计具有一定的理论参考价值。

关键词

局部缺陷；纵向加劲肋；板件屈曲；临界屈曲应力系数

参考

[1] S. F. Badran, A.B. Saddek, H. W.Leheta. Ultimate

strength of Y and T stiffeners subjected to lateral loads

with three different levels of initial imperfection[J]. Ocean

Engineering，61(2013) : 12–25.

[2] C. Graciano, E. Casanova, J. Martínez Imperfection

sensitivity of plate girder webs subjected to patch loading[J].

Journal of Constructional Steel Research, 67(2011):1128–

1133.

[3] M. F. Hassanein. Imperfection analysis of austenitic

stainless steel plate girders failing by shear[J]. Engineering

Structures, 2010, 32(3): 704-713.

[4] Vissarion Papadopoulos, George Soimiris, Manolis

Papadrakakis. Buckling analysis of I-section portal frames with

stochastic imperfections[J]. Engineering Structures,47(2013):

54–66.

[5] Ming Cai Xu, C. Guedes Soares. Assessment of

residual ultimate strength for wide dented stiffened panels

subjected to compressive loads[J]. Engineering Structures,

49(2013): 316–328

[6] Timoshenko S. Theory of elastic stability[M]. New

York: McGraw Hill; 1936.