预应力对超静定结构的作用,除产生主弯矩外还产生次弯矩。等效荷载法是计算次弯矩的最简便方法,但现有等效荷载的计算公式是通过预应力沿预应力筋不变的静定梁求得的,而在实际结构中,尤其是在多跨曲线配筋的预应力超静定结构中,预应力沿预应力筋有明显的变化,因而按现有方法计算等效荷载存在较大的误差。本文提出预应力沿预应力筋变化的超静定结构的等效荷载计算方法,以供设计应用。文末并附有计算实例。 The effect of prestressing on the statically indeterminate structure produces secondary moments in addition to the primary bending moment. The equivalent load method is the easiest way to calculate the secondary bending moment, but the existing equivalent load calculation formula is obtained by prestressing the prestressed tendons along the indeterminate statically determined beam, but in the actual structure, especially in the In pre-stressed statically indeterminate structures with multiple cross-curve reinforcements, the prestressing force has obvious changes along the prestressing tendons, so there is a large error in calculating the equivalent load according to the existing methods. In this paper, the equivalent load calculation method for statically indeterminate structures with prestressed tendons along prestressed tendons is proposed for design application. At the end of the text, examples of calculations are attached.