论文部分内容阅读
预应力混凝土连续箱形梁的预应力筋通常布置在图板和靠近腹板处的顶、底板处。采用顶推法施工的连续箱形梁，除上述永久性预应力筋外，还需在预、底板布设抵抗施工时产生弯矩需要的临时预应力筋．这些临时预应力筋的作用在某些截面会产生较大剪应力．这里提供的分析剪应力的方法能较好的解决问题．
Prestressed tendons of continuous box girders for prestressed concrete are usually placed on the plank and the roof and floor near the web. In addition to the above-mentioned permanent prestressing tendons, the continuous box girder constructed by push-in method shall also be provided with temporary prestressing tendons which are required to generate bending moment during the construction of the pre-foundation and floor slab. The effect of these temporary prestress tendons in some sections will produce greater shear stress. The method of analyzing shear stress provided here can better solve the problem.