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具有宽翼缘的T形梁或箱形梁桥,在弯曲荷载作用下,由于剪力滞效应,不但使腹板顶面上的翼缘应力峰值比按初等梁理论算得的要高;而且其最大挠度值也较按初等梁理论算得的要大。这一点无论从试验和其它分析方法,例如从变分法[1]及有限条法的分析都得到了证明。然而在文献[2、3、4]中却只论及到关于应力的计算问题,相比起来,不能不是比拟杆法的一个缺点。为了完善这一种分析方法,本文拟只对挠度计算问题作一点补充。
Under the bending load, due to the shear lag effect, not only the stress peak value of the flange on the top of the web is higher than that calculated by elementary beam theory, but also the T-shaped beam or box- The maximum deflection value is also larger than that calculated according to elementary beam theory. This is evidenced both from experimental and other analytical methods, such as the analysis of variational methods [1] and the finite strip method. However, in literature [2, 3, 4], it only deals with the calculation of stress, which can not but be a shortcoming compared with the rod method. In order to perfect this kind of analysis method, this article intends to only make a little supplement to the deflection calculation problem.