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1、全焊連續(xù)桁梁一桁拱組合鋼結(jié)構(gòu)橋設(shè)計(jì)曹海順,陳瑋,彭俊,周良57文章編號(hào):1003—4722(2010)04—0057—04全焊連續(xù)桁梁一桁拱組合鋼結(jié)構(gòu)橋設(shè)計(jì)曹海順,陳瑋,彭俊,周良(上海市城市建設(shè)設(shè)計(jì)研究院,上海200125)摘要:上海市嘉定區(qū)桃浦路蘊(yùn)藻浜大橋主橋采用66m+136m下承式兩跨連續(xù)桁梁一桁拱組合結(jié)構(gòu)。承重體系為由箱形或H形桿件組成的2片桁架,主跨拱肋及邊跨桁架均為變高度N形桁式。標(biāo)準(zhǔn)段拱肋全高4.6m,桁架高8.1~15m,寬1.1m。2片桁架之間設(shè)縱、橫聯(lián)及橋門架。橋面由縱、橫梁體系及正交異性鋼橋面板形成。桿件之間的連
2、接均為焊接。吊桿采用高強(qiáng)度平行鋼絲索。橋墩為兩柱式,基礎(chǔ)采用1.0m鉆孔灌注樁群樁基礎(chǔ)。經(jīng)驗(yàn)算桿件強(qiáng)度和穩(wěn)定性均滿足規(guī)范要求,線性屈曲分析表明結(jié)構(gòu)整體穩(wěn)定性較好。關(guān)鍵詞:鋼橋;桁梁;拱形桁架;組合結(jié)構(gòu);焊接;結(jié)構(gòu)分析;橋梁設(shè)計(jì)中圖分類號(hào):U448.36;U442.5文獻(xiàn)標(biāo)志碼:ADesignofAll·-WeldedHybridSteelStructureBridgeofContinuousTrussGirderandTrussArchCAOHai—shun,CHENWei,PENGJun,ZHOULiang(ShanghaiUrban
3、ConstructionDesign&ResearchInstitute,Shanghai200125,China)Abstract:ThemainbridgeofYunzaobangRiverBridgeatTaopuRoad,JiadingDistrict,ShanghaiCityisahybridstructureoftwo—spancontinuousthroughtrussgirderandtrussarchwithspanarrangement66m+136m.Theload—carryingsystemofthebridg
4、eisthetWOtrussesmadeupofbox-shapeandH—shapemembersandthearchribsatthemainspanandthetrussesatthesidespanareallofN—shapetrusseswithvariableheight.Anarchribofthestandardsectionis4.6mintotalheight,atrussatthesidespanis8.1~15minheightand1.1minwidth.Inbe—tweenthetwotrusses,the
5、longitudinalandtransversebracingsandportalframesarearranged.Thefloorsystemofthebridgeisformedbythestringers,crossbeamsandorthotropicsteeldeckplatesandallmembersofthetrussesareconnectedbywelding.Thehangersforthearchareusedwiththehigh—strengthparallelsteelwirestrands.Thepi
6、ersarethetWO—columnonesrestingonthefoundationsof1.0mgroupboredpiles.Thecheckingcalculationofthebridgeprovesthatthestrengthandstabilityofthememberscansatisfytherelevantrequirementsinthecodesandthelinearbulkinganalysisdemonstratesthattheglobalstabilityofthestructureisquite
7、good.Keywords:steelbridge;trussgirder;archshapetruss;hybridstructure;welding;structur—alanalysis;bridgedesign1工程概況蘊(yùn)藻浜西側(cè)11號(hào)線車站與東側(cè)同濟(jì)大學(xué)嘉定校區(qū)桃浦路蘊(yùn)藻浜大橋位于上海市嘉定區(qū),是溝通的大型結(jié)構(gòu)?,F(xiàn)狀蘊(yùn)藻浜在該工程范圍內(nèi)的河寬收稿日期:2010—03—01作者簡(jiǎn)介:曹海JN(1978-),男,工程師,1999年畢業(yè)于長(zhǎng)安大學(xué)公路與城市道路工程專業(yè),工學(xué)學(xué)士,2003年畢業(yè)于上海同濟(jì)大學(xué)橋梁工程專業(yè),工學(xué)碩士(c
8、hs_bridge_tj@163.com)。58橋梁建設(shè)2010年第4期65m,為V級(jí)內(nèi)河航道,水上運(yùn)輸比較繁忙,常水位性土和砂性土等組成。標(biāo)高2.6~2.8m。嘉定區(qū)境內(nèi)地勢(shì)平坦,東北略蘊(yùn)藻浜大橋由主橋、