Corrugated webs are often utilized in bridge engineering applications due to better shear resistance and improved aesthetics. The stress distribution due to flexure and shear of corrugated girders is different from that of the flat girders. Generally, due to the accordion effect, it is assumed that the web contribution is negligible to the bending moment resistance. Further, the use of slender flanges poses stability problems that require investigation. The current study evaluates the adverse effect of slender flange buckling on the moment of resistance of the corrugated web girders through the stability and strength analysis of the steel I-girders with corrugated webs. Extensive parametric studies on buckling co-efficient and moment capacities are carried out using a validated numerical model to develop a better understanding of the flexural capacities of slender (Class 4) cross-section corrugated girders. Also, various design models proposed over three decades from the literature are compared. Based on numerical results, an empirical equation is presented for the determination of the ultimate moment of resistance of slender flanges for corrugated girders.

波纹腹板由于具有更好的抗剪切性和更佳的美观性而常用于桥梁工程应用中。波纹大梁由于弯曲和剪切而产生的应力分布不同于扁平大梁。通常，由于手风琴效应，可以认为腹板的贡献对于抗弯矩性可忽略不计。此外，使用细长的凸缘带来了需要研究的稳定性问题。当前的研究通过对带有波纹腹板的钢工字钢梁的稳定性和强度分析，评估了细长凸缘屈曲对波纹腹板梁的阻力矩的不利影响。使用经过验证的数值模型对屈曲系数和弯矩承载力进行了广泛的参数研究，以更好地理解细长（4类）横截面波纹梁的抗弯承载力。而且，比较了从文献中提出的超过三十年的各种设计模型。基于数值结果，提出了经验方程式，用于确定波纹大梁的细长翼缘的极限抗弯矩。