中文摘要：

为探讨光纤-混凝土复合体在开裂过程中形成的力学-光学本构关系，本文采用模型试验方法对混凝土裂缝监测的分布式光纤传感力学-光学本构关系进行了实测标定，将试验结果中的混凝土裂缝宽度和光损耗值绘于坐标图上，分别采用半对数坐标幂函数拟合和普通坐标的多项式拟合2种方法建立了二者之间的函数关系。2种拟合方法结果的比较表明，普通坐标多项式拟合法优于半对数坐标幂函数拟合法。

英文摘要：

Using the technology of distributed optical fiber sensing for concrete crack monitoring needs to master the mechanics-optics constitutive relation during fiber-concrete complex being cracking. So the mechanics-optics consti- tutive relation of distributed optical fiber sensing for concrete crack sensing has been calibrated by using the method of model tests. The experimental results of the concrete crack width and optic loss have been painted on coordinated Fig. and the function relations of optic loss to crack width in the experimental results have been carried out by the method of curve fitting. The half-logarithm coordinated power function fitting and common coordinated polynomial fitting were used. The comparison between the two fitting methods shows that the common coordinated polynomial fitting is better than the half-logarithm coordinated power function fitting.