資源描述：
《預(yù)應(yīng)力混凝土箱梁豎向預(yù)應(yīng)力鋼筋有效預(yù)應(yīng)力檢測研究》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在工程資料-天天文庫。
1、學(xué)兔兔www.xuetutu.com第38卷，第3期公路工程Vo1．38，No．32013年6月HighwayEngineeringJun．，2013預(yù)應(yīng)力混凝土箱梁豎向預(yù)應(yīng)力鋼筋有效預(yù)應(yīng)力檢測研究劉小燕，王瑋瑋，張峰，齊廣志(1．長沙理工大學(xué)，湖南長沙410000；2．山東大學(xué)巖土與結(jié)構(gòu)工程研究中心，山東濟南250061)[摘要]在大跨度預(yù)應(yīng)力混凝土橋梁中，豎向預(yù)應(yīng)力不足或預(yù)應(yīng)力損失過大將導(dǎo)致箱梁腹板產(chǎn)生斜裂縫．如何檢測箱梁豎向預(yù)應(yīng)力鋼筋的損失，尋找箱梁施工時豎向預(yù)應(yīng)力筋張拉力簡單實用的檢測方法成為大家關(guān)注的熱點。為了能夠有效的檢測箱梁施工過程中的豎向預(yù)應(yīng)力是否達(dá)到設(shè)
2、計值，本文基于結(jié)構(gòu)動力學(xué)理論，通過有限元模型的大量模擬計算，建立起豎向預(yù)應(yīng)力筋外露段長度、錨固段剛度增大系數(shù)與外露段動力特性之間的參數(shù)關(guān)系；通過模型試驗建立了箱梁豎向預(yù)應(yīng)力筋有效預(yù)應(yīng)力和錨固段剛度增大系數(shù)的關(guān)系，并在現(xiàn)場某座連續(xù)剛構(gòu)橋上進(jìn)行了部分節(jié)段的檢測。本文方法為高效、簡便的檢測豎向預(yù)應(yīng)力鋼筋的有效預(yù)應(yīng)力提供了保障。[關(guān)鍵詞]精軋螺紋鋼；張拉力；外露段；箱梁；腹板[中圖分類號]U448．213[文獻(xiàn)標(biāo)識碼]A[文章編號]1674—0610(2013)O3一Ol84一O4StudyonTensioningForceofVerticalFinishRolledThrea
3、dedReinforcingBarInPrestressedConcreteBoxGirderWebsLIUXiaoyan，WANGWeiwei，ZHANGFeng，QIGuangzhi(1．ChangshaUniversityofScienceandTechnology，Changsha，Hunan410000，China；2．ShandongUniversity，GeotechnicalandStructuralEngineeringResearchCenter，Jinan，Shandong250061，China)[Abstract]Asforthelongspa
4、nprestressedconcretebridge，theshortageofverticalprestressingandtheoutgrowlossofprestressingcanbothleadtoinclinedcracksinwebs．Andhowtodetectthelossofverticalprestressinginboxgirderandfindthesimpleandpracticaldetectionmethodtodetecttheten—sioningforceofverticalprestressingtendonarebecoming
5、thefocusofresearch．Inordertoestimatethateffectivelywhetherthetensioningforceaccordwiththedevisednumberornot，thepaperisbasedonthetheoryofstructuraldynamicsthroughthenumericalsimulationcalculationwithplentyoffinitemodels．Theparameterrelationship，whichisamongtheexsertionsegmentlength，thesti
6、ffnessincrementcoefi—cientoftheanchoringsegment，andtheexsertionsegmentdynamiccharacteristicsofverticalprestressingtendon，hasbeenbuilt．Besides，therelationshipbetweentheeffectiveprestressandthestifnessincre—mentcoefficientoftheanchoringsegmentofverticalprestressingtendonhasbeenbuilt，atthes
7、ametime，partialsegmentofacontinuousrigidflamebridgehasbeentest．Thispaperwouldprovideguaranteefortheeficientandsimpleeffectiveprestessdetectionofverticalprestressingtendon．[Keywords]finishingrollingrebar；tensioningforce；exsertionsegment；box—girder；web控制不嚴(yán)，縱向和豎向預(yù)應(yīng)力損失過大；加上運營
