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1、橋梁建設(shè)2()11年第j坶】文章編號：l0034722(20I1)05—0040—04大跨度懸索橋橋面撓度實(shí)時在線監(jiān)測鐘繼衛(wèi)，王波。，史雪峰(1．中鐵大橋局集團(tuán)橋科院有限公司，湖北武漢430034；2．橋梁結(jié)構(gòu)安全與健康湖北省重點(diǎn)實(shí)驗(yàn)室，湖北武漢430034)摘要：為實(shí)時監(jiān)測180t大件運(yùn)輸荷載作用下陽邏長江公路大橋的結(jié)構(gòu)受力性能，利用該橋健康監(jiān)測系統(tǒng)的橋面撓度監(jiān)測子系統(tǒng)數(shù)據(jù)采集分析平臺，對載重車過橋時橋面撓度變化全過程進(jìn)行在線監(jiān)測及數(shù)據(jù)分析。結(jié)果表明，載重車過橋過程中的橋面撓度實(shí)測值與理論計算值吻合較好．橋面撓度實(shí)測值均未超過設(shè)計最不利狀態(tài)值；
2、橋面“梅花形”布置的撓度測點(diǎn)能有效反應(yīng)載重車單幅行駛時橋面的上、下游扭轉(zhuǎn)效應(yīng)。該橋面撓度系統(tǒng)還具有以下功能：通過分析各監(jiān)測點(diǎn)峰值時間點(diǎn)推算出該載重車的行車速度、測試撓度影響線。分析結(jié)果也驗(yàn)證了橋面撓度監(jiān)測系統(tǒng)的有效性及實(shí)用性．關(guān)鍵詞：懸索橋；撓度；監(jiān)測；實(shí)時系統(tǒng)；影響線中圖分類號：U446，TP212文獻(xiàn)標(biāo)志碼：AMonitoringofDeckDeflectionofLongSpanSuspensionBridgeinRealTimeonLineZHONGji—wei～．WANGBo_u．SHIXue—feng，(1．HridgeScience
3、ResearchInstituteItd．，ChinaRailwayMajorBridgeEngineeringGroup．(：hina；2．Keyhat)oratoryofBridgeStructureSafetyandHealthofHubeiProvince．WuhanAbstract：TomonitorthestructuralmechanicalbehaViorofYangluoChangjiangRiverHighWayBridgeundertheloadactionofheavy—dutyvehicletransportationo
4、f180tfreight．thedata(olledionandanalysisplatformofdeckdeflectionmonitoringsubsystemoftheheahhmonitoringsys[en1of／t](2bridgewasemployedtomonitorinrealtimeonlineandtoanalyzethewholeproces()fthedeckdeflectionchangesofthebridgeastheheavydutyvehiclepassedthrough．Yheresultsofthemon
5、itoringandanalysisshowthatthemeasuredvaluesofthedeckdeflectionofthebridgedurillgpassingofthevehiclearewel1coincidentwiththetheoreticvaluesandthemeasuredvaluesd()nol(txceedthevaluesofthemostunfavorablestatusofthedesign．Thedeflectionnleasurenlentpointslaidinquincunxonthedeckcan
6、effectivelyrepresentthetorsionaleffectOfthedeckf-I1iiuI)streamanddownstreamsidesasthevehiclepassesononelaneonthebridge．Besides．thedeckdefleclionmonitoringsubsystemhasmorefunctionsofcalculatingthetravelingspeedofthe、chicleandmeasuringtheinfluentiallinesofthedeflectionthroughan
7、alysisofpeakvaluetimepoims()feachn1(mitoringpoint．Theresultsoftheanalysisalsoverifytheeffectivenessandpracticalapplicabili!yoflhesubsystem．Keywords：suspensionbridge；deflection；monit()ring；real—timesystem；influeniia1lint收稿日期：20o,4Ji1j)·男，高級
8、-~1一I-，1996年畢業(yè)于長沙交通學(xué)院橋梁工程專業(yè)，工學(xué)學(xué)上，200
9、2年畢業(yè)于華中科技大學(xué)結(jié)構(gòu)l、{．f‘學(xué)碩{．(jwzhong@sobL1．()m)’?‘?一樣?々、大跨度懸索橋橋面撓度實(shí)時在線監(jiān)測鐘
