斜交预应力箱梁位于腹板的钢绞线是三维曲线,若简化为平面曲线进行计算,将使下料长度和竖向弯起角与实际有不可忽略的误差,并影响张拉伸长量的计算结果,故有必要结合工程实例对其进行详细介绍。 Strand prestressed box girder is located in the web of steel strand is a three-dimensional curve, if simplified to a plane curve calculation, will make the cutting length and vertical bending angle and the actual error can not be ignored, and affect the tensile elongation The amount of calculation results, it is necessary to combine engineering examples of its detailed description.