- 何志文1,赵新铭1,叶宇霄2 ,胡少伟2
2020年第7期
摘要
引用本文
摘 要:为研究光纤传感器在短距离内混凝土管出现多缝情况下的布里渊频移特征,设计了系列双裂缝间距的板材拉伸试验;通过试验所得布里渊频移结果得出以下结论:当双缝间距小于50mm,难以区分裂缝个数;当双缝间距大于50mm,且小于200mm时,频移图的拟合波峰区间发生了变化;当双缝间距大于200mm,频移图峰值点会发生变化,最后,通过混凝土管压力试验,验证了利用分布式光纤监测混凝土管裂缝的有效性。Abstract:InordertostudytheBrillouinfrequencyshiftcharacteristicsofopticalfibersensorinthecaseofmultiplecracksofconcretepipeinashortdistance,aseriesofplatetensiletestswithdoublecrackspacingaredesigned.TheresultsofBrillouinfrequencyshiftobtainedfromthetestsshowthatwhenthedistancebetweentwocracksislessthan50mm,itisdifficulttodistinguishthenumberofcracks.Whenthedistancebetweentwocracksisgreaterthan50mmandlessthan200mm,therangeoffittingwavepeaksofthefrequencyshiftdiagramchanges.Whenthedistancebetweenthetwojointsismorethan200mm,thepeakpointofthefrequencyshiftdiagramchanges.Theconcretepipepressuretestisdesignedtoverifythetestresultsoftheplate.
何志文,赵新铭,叶宇霄,等.基于BOTDA的混凝土管双裂缝监测试验研究[J].混凝土与水泥制品,2020(7):43-46.
HE Zhi-wen,ZHAO Xin-ming,YE Yu-xiao,et al.Experimental Study on Double Crack Monitoring of Concrete Pipe Based on BOTDA[J].China Concrete and Cement Products,2020(7):43-46.