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（廣西科技大學(xué)土木建筑工程學(xué)院， 柳州 545006）
［摘要］將碳纖維增強(qiáng)復(fù)合材料（CFRP）與光纖光柵（OFBG)的傳感特性結(jié)合，研制出智能碳纖維（CFRP-OFBG）板。共對6根梁進(jìn)行試驗(yàn)，其中5根為CFRP-OFBG板嵌入式加固矩形截面鋼筋混凝土梁，1根未加固矩形截面鋼筋混凝土梁作為對比，通過試驗(yàn)監(jiān)測CFRP-OFBG板的中心波長變化來推算出CFRP-OFBG板的應(yīng)變值，并將CFRP-OFBG板的中心波長變化與同一位置處CFRP-OFBG板的應(yīng)變值進(jìn)行繪圖分析。結(jié)果表明：CFRP-OFBG板的中心波長變化與同一位置處CFRP-OFBG板的應(yīng)變值呈現(xiàn)出良好的線性關(guān)系，且擬合得到的CFRP-OFBG板靈敏度系數(shù)約為1-2pm/με，與CFRP-OFBG板的應(yīng)變傳感靈敏度1-281pm/με吻合良好，為結(jié)構(gòu)健康監(jiān)測和結(jié)構(gòu)可靠性分析提供了一種方法。
［關(guān)鍵詞］碳纖維復(fù)合材料； 光纖光柵； 智能碳纖維板； 嵌入式加固； 波長； 應(yīng)變
中圖分類號：TU394文獻(xiàn)標(biāo)識碼：A文章編號：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
*國家自然科學(xué)基金項(xiàng)目（51568008），廣西高?？茖W(xué)技術(shù)研究項(xiàng)目(KY2015YB164)，廣西高校中青年教師基礎(chǔ)能力提升項(xiàng)(KY2016YB248)。
作者簡介：鄧?yán)誓?，博士，教授，Email：langni666@126.com。
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