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《預(yù)應(yīng)力混凝土連續(xù)剛構(gòu)寬箱梁橋施工監(jiān)控技術(shù)研究》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、重慶交通學(xué)院碩士學(xué)位論文預(yù)應(yīng)力混凝土連續(xù)剛構(gòu)寬箱梁橋施工監(jiān)控技術(shù)研究姓名:林勝申請(qǐng)學(xué)位級(jí)別:碩士專業(yè):橋梁與隧道工程指導(dǎo)教師:王成2003.4.8摘要卜l近年來(lái),預(yù)應(yīng)力混凝土連續(xù)剛構(gòu)橋在國(guó)內(nèi)外取得了廣泛的應(yīng)用,跨徑越來(lái)越大.’高速公路橋梁雙幅寬度采用一個(gè)單箱單室的寬箱梁結(jié)構(gòu)已經(jīng)出現(xiàn),而對(duì)這類寬箱梁結(jié)構(gòu)的施工監(jiān)控計(jì)算常采用平面桿系分析軟件,應(yīng)力計(jì)算締果與實(shí)測(cè)相差較大,同時(shí),平面桿系模型也無(wú)法反映三維實(shí)橋受力特性,為此,本文以云南大理——髁山高速公路K442+665連續(xù)剛構(gòu)寬箱梁橋施工監(jiān)控為背景,采用多種分析方法與實(shí)測(cè)結(jié)果進(jìn)行對(duì)比研究,主要內(nèi)容如下:1、在已有彈性理論
2、分析基礎(chǔ)上,對(duì)預(yù)應(yīng)力混凝土連續(xù)剛構(gòu)橋?qū)捪淞阂M(jìn)一些解析分析,包括箱梁剪力滯效應(yīng)分析和大噸位預(yù)應(yīng)力錨端局部應(yīng)力分析;2、連續(xù)剛構(gòu)寬箱梁橋施工過(guò)程平面桿系模型分析,獲得結(jié)構(gòu)變形和應(yīng)力結(jié)果:3、連續(xù)剛構(gòu)寬箱梁橋施工過(guò)程三維有限元分析,包括預(yù)應(yīng)力錨端局部應(yīng)力分析和施工過(guò)程最大懸臂應(yīng)力分析等,獲得結(jié)構(gòu)空間應(yīng)力與變形結(jié)果:分別研究寬箱梁懸臂狀態(tài)由于縱向預(yù)應(yīng)力和剪力滯效應(yīng)對(duì)截面應(yīng)力分布不均的影響程度及沿縱橋向的變化規(guī)律,提出預(yù)應(yīng)力在寬箱梁截面內(nèi)均勻化概念。4、連續(xù)剛構(gòu)寬箱梁橋現(xiàn)場(chǎng)施工過(guò)程監(jiān)測(cè),研究實(shí)橋受力狀態(tài)影響因素。5、對(duì)未來(lái)建造連續(xù)剛構(gòu)寬箱梁橋的設(shè)計(jì)、施工和監(jiān)控提出若干建議
3、。關(guān)鍵詞:寬箱梁,預(yù)應(yīng)力局部應(yīng)力,剪力滯,連續(xù)剛構(gòu)橋,施工監(jiān)控。/-
4、/vV。。、,ABSTRACTlnt11erecentyears,thePrestressedConcreteContinuoussRigid(PCCR)brigdehadbeenwidelyappliedallovertheworldwithlargerandlagerspans.OntheexpresswaythePCCRbridgewiththesingle-boxwidecrosssectionsforthedoubledrivewaybreadthshadappeared,fortho
5、sestmcturswithwideboxgirderstheconstructioncontrolusuallyiSconductedwiththeplanerodFiniteElementMethod(FEM)analyticsoftwarewhichgivesstressresultsquitedifferentfromthoseofthetestingprocedure,becausetheplanerodFEMmodelcouldhardlysimulatetheactualthree·dimensionallymechanicallybehavingb
6、ridge,Aimingatsuchaproblem,thepaperaplliesmultipleanalyticalmethodsonsingle—boxwidecrosssectionPCCRBridgeK442+665onDali-BaoshanexpresswayinYunnanprovince,togetthecalculatedresultsforcomparisonwiththetesteddatainresearch.Themaincontentsateasfollows:l、Basedontheexistentelasticanalysis,s
7、omeholomorphicanalysis,includingtheboxgirdershearhysteresiseffectanalysisandthelocalstressanalysisatthelarge—tonnageprestressinganchorspots,isintroducedintheresearchofthePCCRbridgewithwideboxgirders.2、Theplanerod—modelanalysisoftheconstructionprocedureofthePCCRwide·-box·,girderbridgei
8、sconductedtogettheresultsofstructuraldeformationandstresses.3、Thethree—dimensionalFEManalysis.includingthelocalstressanalysisatthelarge-tonnageprestressinganchorspotsandthemaximumcantileverstressanalysisduringtheconstructioncourse,isdonefortheconstructionprocedureofthePCCRwide—box—gir
9、derbr