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ID:33013124
大小:3.30 MB
页数:70页
时间:2019-02-19
《高拱坝闸墩u形预应力锚索受力不均匀性分析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、重庆大学硕士学位论文II英文摘要ABSTRACTIntheprocessofpullingtheU-shapedanchorropesentirely,andinthebendingsectionoftheanchorropes,therearecontactfrictionsbetweenthesteelstrands,inaddition,thesteelstrands’arrangementpositionsonthecrosssectionofanchorropeswouldchangewiththetension,toge
2、therwithinitialunevennessofstress,allthosefactorscancauseunevennessofstressinthesteelstrandsofananchorrope,eventhereisagreatdifferencebetweeneachother.Engineeringexperienceindicatesthatthisunevennesscanbereducedbysingletension,butit’sconstructionprocessistoocomplicated
3、,andit’sconstructionperiodislong,moreover,singletensionneedhighercost,sothatitisnotadvisabletogeneralizethismethod,thecommonlyusedmethodisstillpullingtheU-shapedanchorropesentirelyordoitaftersinglepreload.Unevennessofstressinthesteelstrandscausedbypullingentirelyleadsa
4、lotofobstaclestodesignandconstruction,itisagreatdifficultyinthecurrentqualitycontrolofU-shapedpre-stressedanchorropes.AndtheU-shapedpieranchorropeshavecharactersofmoresteelstrands,longerbendingsectionandlargerpullingforce,allthosecharacterswillworsenUnevennessofstressi
5、nthesteelstrands.ThisarticlepointsatthestressunevennessofU-shapedanchorropesinhigharchdam’spier,theresearchcontentsareasfollows:①AfterinvestigatingtheconstructionsiteandanalyzingcarefullytheconstructiontechnologyofU-shapedanchorropes,weputtedforwardatestingplanthatwoul
6、dbeusedtoteststressofsinglesteelstrandwhentheanchorropesarepulledentirely,andactualizedthefieldtestsuccessfully,obtainedtheforcedataofsinglesteelstrand.Wemanipulatedtheforcedataofsteelstrandsbytheanchorrope’sunevennesscoefficient,sowecananalyzethedegreeoftheunevennessa
7、ndit’sfeatures.②Thisarticlesummarizedvariousfactorsthatwouldpossiblycauseunevennessofstressinthesteelstrands,andanalyzedeachkindoffactorquantificationally.Withregardtothefactorofcontactfriction,wecalculatedoutthestressvalueofeachsteelstrand,withtheformulagivenbycriteri
8、onandtheclassicaltheoryoffrictionRelatedtothisproblem.③Aftercomparingtheresultofquantitativeanalysisandtheresultoftes
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