（广西科技大学土木建筑工程学院， 柳州 545006）

［摘要］将碳纤维增强复合材料（CFRP）与光纤光栅（OFBG)的传感特性结合，研制出智能碳纤维（CFRP-OFBG）板。共对6根梁进行试验，其中5根为CFRP-OFBG板嵌入式加固矩形截面钢筋混凝土梁，1根未加固矩形截面钢筋混凝土梁作为对比，通过试验监测CFRP-OFBG板的中心波长变化来推算出CFRP-OFBG板的应变值，并将CFRP-OFBG板的中心波长变化与同一位置处CFRP-OFBG板的应变值进行绘图分析。结果表明：CFRP-OFBG板的中心波长变化与同一位置处CFRP-OFBG板的应变值呈现出良好的线性关系，且拟合得到的CFRP-OFBG板灵敏度系数约为1-2pm/με，与CFRP-OFBG板的应变传感灵敏度1-281pm/με吻合良好，为结构健康监测和结构可靠性分析提供了一种方法。

［关键词］碳纤维复合材料； 光纤光栅； 智能碳纤维板； 嵌入式加固； 波长； 应变

中图分类号：TU394文献标识码：A文章编号：1002-848X(2019)03-0092-06

Experimental study on intelligent carbon fiber slab embedded reinforced concrete beam with rectangular section

Deng Langni， Luo Risheng， Qian Xiangguo， Ma Jinchao， Huang Xiaoxia

(School of Civil Engineering and Architecture， Guangxi University of Science and Technology， Liuzhou 545006， China)

Abstract:The sensing characteristics of the optical fiber bragg grating (OFBG) were incorporated with carbon fiber reinforced plastics (CFRP) to develop the intelligent carbon fiber (CFRP-OFBG) slab. Six beams were tested; five of them were CFRP-OFBG embedded reinforced concrete beams with rectangular section and one was reinforced concrete beam with rectangular section but without CFRP-OFBG embedded reinforcement as contrast. The strain values of CFRP-OFBG slabs were calculated by monitoring the change of the central wavelength of CFRP-OFBG slabs, and the central wavelength of CFRP-OFBG slabs and the strain values of CFRP-OFBG slabs at the same location were plotted and analyzed. The results show that the change of the central wavelength of CFRP-OFBG slab has a good linear relationship with the strain value of CFRP-OFBG slab at the same location, and the sensitivity coefficient of CFRP-OFBG plate obtained by fitting is about 1-2pm/με, which is in good agreement with the strain sensitivity of CFRP-OFBG slab of 1-281pm/με. It provides a method for structural health monitoring and structural reliability analysis.

Keywords:carbon fiber reinforced plastics; fiber bragg grating; intelligent carbon fiber slab; embedded reinforcement; wavelength; strain

*国家自然科学基金项目（51568008），广西高校科学技术研究项目(KY2015YB164)，广西高校中青年教师基础能力提升项(KY2016YB248)。

作者简介：邓朗妮，博士，教授，Email：langni666@126.com。