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1、橋梁建設(shè)２０１７年第４７卷第４期（總第２４５期）７２BridgeConstruction，Vol．４７，No．４，２０１７（TotallyNo．２４５）文章編號(hào)：１００３－４７２２（２０１７）０４－００７２－０６波形鋼腹板連續(xù)剛構(gòu)橋極限跨度研究宋隨弟，陳克堅(jiān)，袁明（中鐵二院工程集團(tuán)有限責(zé)任公司，四川成都６１００３１）摘要：針對(duì)現(xiàn)有波形鋼腹板連續(xù)剛構(gòu)橋跨度偏小的情況，分析影響該類橋梁極限跨度的主要因素，并提出解決限制其跨度增長(zhǎng)的關(guān)鍵問題的相應(yīng)技術(shù)措施。分析表明：波形鋼腹板的整體穩(wěn)定性、箱梁的扭轉(zhuǎn)及畸變會(huì)極大地限制波形鋼腹板箱梁橋的跨度，其最大跨度應(yīng)該能夠達(dá)到甚至
2、超過混凝土腹板箱梁橋的跨度。對(duì)于３０mm厚的１６００型波形鋼腹板，當(dāng)鋼腹板整體屈曲失穩(wěn)分別發(fā)生在屈服區(qū)和非彈性區(qū)時(shí)，波形鋼腹板箱梁連續(xù)剛構(gòu)橋的最大跨度可分別達(dá)到１６２m和２３８m；增大波高或采用復(fù)合波形鋼腹板時(shí)，該類橋梁的跨度能超過３００m。當(dāng)波形鋼腹板箱梁橋的跨度超過１６０m時(shí)，可以考慮采用復(fù)合波形鋼腹板；當(dāng)跨度超過２３０m時(shí)，應(yīng)該采用復(fù)合波形鋼腹板。設(shè)置適當(dāng)數(shù)量的橫隔板可以提高波形鋼腹板箱梁的抗扭轉(zhuǎn)及抗畸變能力，可采用鋼桁架等輕型橫隔板以減輕其自重。關(guān)鍵詞：連續(xù)剛構(gòu)橋；波形鋼腹板；組合箱梁；屈曲穩(wěn)定；復(fù)合波形鋼腹板；極限跨度中圖分類號(hào)：U４４８．２１６；U
3、４４８．２３文獻(xiàn)標(biāo)志碼：AStudyofUltimateSpansofContinuousRigid‐FrameBridgeswithCorrugatedSteelWebsSONGSuidi，CHENKejian，YUANMin‐g‐（ChinaRailwayEryuanEngineeringGroupCo．，Ltd．，Chengdu６１００３１，China）Abstract：Inviewofthefactthatthespansoftheexistingcontinuousrigid‐framebridgeswithcorrugatedsteelwebsar
4、eabitshort，themajorfactorsthatmighthaveinfluencesontheultimatespansofthebridgesareanalyzedandthecorrespondingtechnicalmeasuresthatcanprovidesolu‐tiontothecriticalproblemsthatrestricttheincreaseofthespansareproposed．Theresultsoftheanalysissuggestthatthefactors，suchastheglobalstabilit
5、yofthecorrugatedsteelwebsandthetorsionanddistortionoftheboxgirdersoftherigid‐framebridges，cangreatlyrestrictthespansofthebridgesandthelongestspansofthebridgesshouldbeabletoreachorevenexceedthoseoftheconcretewebboxgirderbridges．Forthetype１６００corrugatedsteelwebsof３０mmthickness，whenthe
6、globalbucklinginstabilityofthewebsoccursrespectivelyintheyieldingandnon‐elasticzones，thelongestspansofthebridgescanrespectivelyreach１６２mand２３８m．Whenthecorruga‐tionheightisincreasedorthecompositecorrugatedsteelwebsareutilized，thespanscanbeevenlongerthan３００m．Whenthespansofthebridgesar
7、elongerthan１６０m，theutilizationofthecompositecorrugatedsteelwebscanbeconsidered．Whenthespansarelongerthan２３０m，thewebsshouldbeutilized．Thearrangementoftheappropriateamountsofthediaphragmsintheboxgirderscanimprovethetorsionanddistortionresistancecapacityofthegirdersandtheutilizationoft
8、helightweightdiaphr
