波形钢腹板剪切屈曲分析

Analysis on Shear Buckling of Corrugated Steel Web

波形钢腹板组合箱梁最显著的受力特点是:混凝土顶底板抗弯,波形钢腹板抗剪。该文介绍了美国Hamilton教授的剪切屈曲试验情况,并对试验梁进行了弹塑性局部屈曲和整体屈曲有限元分析;采用小挠度线性理论,将局部屈曲和整体屈曲板件分别比拟成四边受剪的矩形板和正交异性板,推导了各自的临界剪应力计算公式。理论分析值与试验结果、空间有限元计算值吻合较好,说明该文的理论公式可以在设计中应用。

The most distinguishing bearing feature of composite box girders with corrugated steel webs is that top and bottom decks resist moment,at the same time the corrugated steel webs resist shear force.The article introduces the shear buckling test made by Professor Hamilton in America,and carries out the finite element analysis of elastic-plastic local buckling and integral buckling.Based on the small deflection theory,the local and integral buckling samples are respectively assimilated to the rectangular plate and the orthotropic plate subjected to shear on four sides,and the formulas for each critical shear stress are established.The theoretical analysis value,test results and spatial finite element calculation are matched better,which explains that the theoretical formulas in the article can be used in design.