曲梁中计入摩阻力的预应力等代荷载

The Equivalent Load of Prestressing Force Adding Resistance ofFriction in Curved Girder

在曲梁中预应力因摩阻力引起的应力损失随着曲梁曲率的增大而增加。因此，预应力等代荷载的计算必须计入摩阻力的影响。根据力学基本原理并利用微分几何基本公式，本文推导出圆弧曲线梁计入摩阻力的预应力等代荷载的完整公式。当利用计算机计算预应力曲梁时，利用该公式将得出准确的计算结果。

Because the loss of prestressing force caused by friction resistance in curved girder will increase with the increasing of the curvature of curved girder, the calculation for equivalent load of prestressing force must add the effect of friction resistance. According to the basic theory of mechanics and using the fundamental formula of differential geometry, this article derives the complete formula of calculation for equivalent load of prestressing force adding the effect of friction resistance in curved girder of arc form. When computer calculates prestressing force in curved girder, it will reach accurate calculation result if using this formula.