针对碳纤维复合材料(CFRP)混凝土复合拱裂缝监测问题，尝试了使用裸光纤布拉格光栅(FBG)应变传感器监控CFRP 混凝土复合拱初始开裂。从力学角度分析并确定粘贴位置，并对点粘和满粘(点粘是指只粘贴栅区两端点，而满粘将胶涂满整个栅区)两种不同粘贴方法开展研究。对比光纤光栅和应变片测量数据，验证光纤光栅测量应变的准确性和稳定性。运用K 值标准差准则，将开裂规律定量化。实验结果表明通过合理布设光纤光栅，可以监测结构的初始开裂，并且光纤光栅和应变片测量数据具有较好的一致性。

To the crack monitoring of the carbon fibre reinforced plastics (CFRP) concrete composite arch, an experiment is conducted to monitor the appearance of the crack with bare fiber Bragg grating (FBG) strain sensors. The location of fiber Bragg grating (FBG) is determined via mechanic analysis, two kinds of pasting method is studied: local and distributed coupling (in the first case the measurement fiber is attached to the host structure at two points, in the second case the measurement fiber is attached along the whole active region). A comparison between the data of FBG and strain gauge is conducted to validate the precision and stability of FBG. The test results show the quantitative rule of crack initiation via K value standard deviation criterion. The initial cracking can be monitored by arranging the FBG sensors appropriately, good consistency can be achieved between FBG and strain gauge.