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1、橋梁建設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時在線監(jiān)測鐘繼衛(wèi),王波。,史雪峰(1.中鐵大橋局集團橋科院有限公司,湖北武漢430034;2.橋梁結構安全與健康湖北省重點實驗室,湖北武漢430034)摘要:為實時監(jiān)測180t大件運輸荷載作用下陽邏長江公路大橋的結構受力性能,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行在線監(jiān)測及數(shù)據(jù)分析。結果表明,載重車過橋過程中的橋面撓度實測值與理論計算值吻合較好.橋面撓度實測值均未超過設計最不利狀態(tài)值;
2、橋面“梅花形”布置的撓度測點能有效反應載重車單幅行駛時橋面的上、下游扭轉效應。該橋面撓度系統(tǒng)還具有以下功能:通過分析各監(jiān)測點峰值時間點推算出該載重車的行車速度、測試撓度影響線。分析結果也驗證了橋面撓度監(jiān)測系統(tǒng)的有效性及實用性.關鍵詞:懸索橋;撓度;監(jiān)測;實時系統(tǒng);影響線中圖分類號:U446,TP212文獻標志碼: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)于長沙交通學院橋梁工程專業(yè),工學學上,200
9、2年畢業(yè)于華中科技大學結構l、{.f‘學碩{.(jwzhong@sobL1.()m)’?‘?一樣?々、大跨度懸索橋橋面撓度實時在線監(jiān)測鐘