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1、橋梁建設(shè)2016年第46卷第1期(總第236期)88BridgeConstruction，Vo1．46，No．1，2016(TotallyNo．236)文章編號：1003—4722(2016)01—0088—06斜拉橋索塔分離式斜置鋼錨箱受力分析李福鼎(上海市政工程設(shè)計研究總院(集團(tuán))有限公司，上海200092)摘要：為研究斜拉橋索塔分離式斜置鋼錨箱的特性，對其結(jié)構(gòu)特點(diǎn)及索塔錨固區(qū)受力進(jìn)行分析。由于鋼錨箱分離斜置，橫橋向水平分力無法自平衡，塔柱相對于鋼錨箱剛度增大，塔柱同時承擔(dān)全部橫橋向水平力和較多順
2、橋向水平力。以某獨(dú)塔斜拉橋菱形橋塔為例，采用ANSYS建立索塔鋼錨箱空間模型，分析鋼錨箱斜置對鋼錨箱和塔壁應(yīng)力分布的影響及斜拉索水平力在兩者間的分配比例。結(jié)果表明：相對于整體式鋼錨箱，分離式斜置鋼錨箱斜拉索水平力分配比例降低，混凝土塔柱承擔(dān)了較多水平分力，鋼錨箱各板件和剪力釘受力不對稱，應(yīng)力水平較低且分布不均。關(guān)鍵詞：鋼錨箱；斜拉橋；菱形橋塔；索塔錨固區(qū)；結(jié)構(gòu)特點(diǎn)；受力分析；有限元法中圖分類號：U443．38；U448．27文獻(xiàn)標(biāo)志碼：AForceConditionAnalysisofSeparate
3、dandObliquelySetSteelAnchorBoxesinPylonofCable-StayedBridgeLIFu-ding(ShanghaiMunicipalEngineeringDesignInstitute(Group)Co．，Ltd．，Shanghai200092，China)Abstract：Tostudythecharacteristicsoftheseparatedandobliquelysetsteelanchorboxesinpylonofcable—stayedbrid
4、ge。thestructuralcharacteristicsoftheanchorboxesandtheforcecondi—tionsoftheanchorageZoneinthepylonwereanalyzed．Becausetheanchorboxeswereseparatedandobliquelyset，thetransversehorizontalcomponentforcecouldnotbeself—balancedandincorn—parisontotherigidityoft
5、heanchorboxes，therigidityoftheconcretepyloncolumnsincreasedandatthesametime，thepyloncolumns．borethewholeofthetransversehorizontalforceandmuchofthelongitudinalhorizontalforce．Bywayofexampleofthediamond—shapepylonofasingle—pyloncable—stayedbridge，thesoftw
6、areANSYSwasusedtoestablishthespatialfiniteelementroodelfortheanchorboxesinthepylon，theinfluencesoftheobliquelysettingoftheanchorboxesonthestressdistributionoftheanchorboxesandpylonwallsaswel1astheratiosofthehorizontalforcedistributionofthestaycablesbetw
7、eentheanchorboxesandpylonwallswereanalyzed．There-suitsoftheanalysisshowthatascomparedtotheintegralstee1anchorbox，theratiosofthehori—zontalforcedistributionofthestaycablesoftheseparatedandobliquelysetsteejanchorboxesde—creaseandthepyloncolumnsbearmuchoft
8、hehorizontalcomponentforce．Theforceconditionsofthecomponentsandshearstudsoftheanchorboxesarenotsymmetric，thestress1evelsare1OWandarenotuniform．Keywords：steelanchorbox；cable—stayedbridge；diamond—shapepylon；anchoragezoneinpylon；str
