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ID:32392146
大小:1.25 MB
页数:6页
时间:2019-02-04
《曲率模态方法对系杆拱桥的损伤识别》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、!37"!1#&'()*++,(-./+0)Vol.37No.12015$1%JOURNALOFNANJINGTECHUNIVERSITY(NaturalScienceEdition)Jan.2015doi:10.3969/j.issn.1671-7627.2015.01.016³RSjô÷øù2úûü´112lÞ,jß,!tà(1.AB,C-.ÌÍ.0,DEAB211800;2.AB,C-.¿À,V.0,DEAB211800)@A:7«`;£¤R,äQMidasÎ?+Ö«},£¤«`±53#`°,KRBføh«$,.@Û3ëÓxyUVÔ;<,Q5½øh«$à9ó2R«`ëUV¡,Kä
2、Q5½øh«$à9ó2Rr´ë3«`^áµhUV,.,!"Matlab¸rsÓyKÃÓ3µ,äQ7^õM3z`3µGZ,ch3µGZ¡r´«`3ëI¾>]ëÀÒ,s5½øh«$à9ó2>r´«`ëÓ2Q3ÅV°]Q°。£¤³:Ç«`Ýsëc,ëÀÒ5½øh«$à9øR>G,Q5½øh«$à9ó2Å7ô¡¡r´«`3ëÀÒ,ç衱53tRë¸b,>r´«`3ëÓ2üË¡3pQö。BCD:«`;øh«$xy;5½øh«$à9;+Ö,.1E-FG:U441?HIG:1671-7627(2015)01-0088-06Damagedetectionoftiedarchbridgebasedon
3、curvaturemodalmethod112HUANGCheng,LUORen,HANXiaojian(1.CollegeofTransportationScienceandEngineering,NanjingTechUniversity,Nanjing211800,China;2.CollegeofCivilEngineering,NanjingTechUniversity,Nanjing211800,China)Abstract:ThefiniteelementmodelwasestablishbyMidastostudythedynamiccharacteristicsoft
4、iedarchbridge,andcurvaturemodaldamageidentificationmethodfortheoreticalanalysiswasdiscussed.Then,themeancurvaturemodalindexwasquotedtoevaluatethetiedarchbridgesuspenderdamage,andtheactualtestdataoftiedarchbridgedamagewereanalyzedbytheaveragecurvaturemodalindexthroughMatlabprogramtoachievethereco
5、gnitionalgorithmandparameteridentification.Parameterchangechartswereplottedbygraphicsoftwaretodeterminetheactualtiedarchbridgedamageexistenceanddamagelocation,andthefeasibilityandapplicabilityoftheaveragecurvaturemodalfactorsinforactualtiedarchbridgedamageidentificationwasverified.Researchshownt
6、hatwhenthetiedarchbridgedamaged,themeancurvaturemodalfactorcurveatdamagelocationmutated.Themeancurvaturemodeindexcouldbeusedtodeterminethedamagelocationinactualtiedarchbridge,andrelativedamagedegreeofthestructurecouldbepreliminarydeterminant.Theresearchhadcertainapplicationvalueinthedamageidenti
7、ficationofthetiedarchbridge.Keywords:tiedarchbridge;curvaturemodalmethod;averagecurvaturemodalfactor;finiteelementanalysis5678:2014-03-119:;<:](1989—),3,45åù8,§<,=>?@ABC
8、q[¶ñÕæ;#ç(t8),9:,Email:luorenyy@163.com.=4>?:],#ç,1s
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