PC steel strand with optical fiber, strain measurement device, and method for manufacturing PC steel strand with optical fiber

Provided is a PC steel strand with optical fibers, comprising: a PC steel strand formed by twisting a plurality of PC steel wires; and an optical fiber fixed to a twisted groove via a resin, the twisted groove being a groove disposed between two adjacent PC steel wires on the outer surface of the PC steel strand. The coefficient of variation of the distance between the center of the optical fiber and a common tangent of two adjacent PC steel wires constituting the twisted groove, as measured in ten cross sections perpendicular to the longitudinal direction of the PC steel strands, is 0.5 or less. 一种带光纤的PC钢绞线，具有：PC钢绞线，由多根PC钢线绞合而成；以及光纤，所述光纤通过树脂固定于扭绞槽，其中，所述扭绞槽是配置于所述PC钢绞线的外表面的邻接的两根所述PC钢线之间的槽，在与所述PC钢绞线的长度方向垂直的十个截面中测定出的、构成所述扭绞槽的邻接的两根所述PC钢线的公切线与所述光纤的中心之间的距离的变异系数为0.5以下。