混凝土贯穿空洞的摄影探测

,,,(,430072):,,,,,,:;;;:TG115.28:A:100026656(2003)0720354204DETECTIONOFTHETHROUGH2HOLEDEFECTINCONCRETEBYPHOTOGRAPHYJIANGYin2jun,ZHUYong2hua,CHENSi2zuo,YANGRui2ling(SchoolofCivilEngineering,WuhanUniversity,Wuhan430072,China)Abstract:Thetemperaturefieldoftheconcretespecimenwithathrough2holedefectwasstudiedtolookforawayforrapid,large2scaleandlow2costnondestructivetestingofconcrete.Theinformationofinnerdefectwasgivenbytherelationshipbetweentheimageofthespecimensurfacebesprinkledwithwaterandthetemperaturefield,andcomparedwiththenumericresultoffiniteelementmethod.Experimentalresultsshowedthatthemethodwasfeasibleandprospectedwell.Keywords:Photography;Concrete;Temperaturefield;Hole,,,,,,,,,,,,[1],,;,X:2002205227:(50178057),,,,1,,,,,,,(),,,45325720037NDTVol.25No.7July2003©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,,,,,2,150mm150mm150mmC25,1,250mm50mm150mm,113,,,(2),,(),,,,,33,,,;,2,,34,(4)34,(x,y,z)tT(x,y,z,t),k52T5x2+52T5y2+52T5z2+g(x,y,z,t)=cp5T5t(1)g(x,y,z,t)kcp,,,,,(,,),,5,k52T5x2+52T5y2=0(2)553:©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.5y=0,0xh;y=h,0xh:-k5T5x=(Tw-Tf)x=0,0yh;x=h,0yh:-k5T5x=0x=a,byb+t;x=b+t,byb+t:-k5T5y=0y=b,axa+t;y=b+t,axa+t:-k5T5x=0(3)Tw,Tfy=0,0xh;y=h,0xh,x=0,0yh;x=h,0yh,5,(2)(3),6[4]2300kg/m3;1.13kJ/kg;4.61kJ/mh;6,55,20,,;36.12kJ/m2h7,78(1)8,,2.5,,78,7,,66.1,,,,,,,,,,,,653:©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.6.2(1),,,,,,,,,,,(2),,,,()(),(3)()(),,,6.3(),,,,,,,,,:[1].[M].:,1996.[2]MN,.[M].:,1983.[3]ERG,RM,.[M].:,1983.[4].[M].:,1982.[5].[M].:,1990.[6].[M].2,:,1986.(339)4,,T4,,,,,,,;,,,,,:[1].[J].,1998,(163):10-11.[2],.[J].,1995,(2):16.[3],.[J].,2000,(1):37.[4],.[M].:,1998.131-133.[5].[D].:,1984.753:©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.