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1、第３４卷第３期建筑科學(xué)與工程學(xué)報(bào)Vol．３４No．３２０１７年５月JournalofArchitectureandCivilEngineeringMay２０１７文章編號(hào)：１６７３‐２０４９（２０１７）０３‐００２４‐０７半整體式橋臺(tái)無(wú)縫化斜交橋的抗震性能分析莊一舟，李增鋒，程俊峰，徐亮（福州大學(xué)土木工程學(xué)院，福建福州３５０１０８）摘要：為了掌握半整體無(wú)縫斜交橋的動(dòng)力特性和地震響應(yīng)特點(diǎn)，采用MIDAS／Civil建立了湖州貫邊橋的有限元模型，進(jìn)行了動(dòng)力特性分析，并運(yùn)用反應(yīng)譜法和地震時(shí)程法對(duì)無(wú)縫化斜交橋進(jìn)行了地震響應(yīng)分析。結(jié)果表明：梁端臺(tái)后土對(duì)橋梁的約
2、束作用隨斜交角的增大而逐漸減弱；主梁梁端臺(tái)后土的作用對(duì)橋梁結(jié)構(gòu)是有利的，可以有效約束橋梁縱飄；在進(jìn)行地震安全性分析時(shí)，用反應(yīng)譜法所得的墩底內(nèi)力和墩頂位移均大于時(shí)程分析法；在進(jìn)行半整體無(wú)縫斜交橋的工程設(shè)計(jì)時(shí)，應(yīng)以垂直于蓋梁方向輸入地震動(dòng)計(jì)算固定支座所產(chǎn)生的墩頂位移來(lái)控制橋梁的抗震安全性；所得研究成果為半整體式橋臺(tái)無(wú)縫化斜交橋的抗震設(shè)計(jì)和研究提供了可參考資料，對(duì)該橋型的實(shí)際工程應(yīng)用和發(fā)展起到了推動(dòng)作用。關(guān)鍵詞：半整體無(wú)縫斜交橋；動(dòng)力反應(yīng)譜；時(shí)程分析；斜交角；橋臺(tái)‐土相互作用中圖分類號(hào)：U４４１．３文獻(xiàn)標(biāo)志碼：AAnalysisonSeismicPerf
3、ormanceofSemi‐integralAbutmentJointlessSkewBridgeZHUANGYi‐zhou，LIZeng‐feng，CHENGJun‐feng，XULiang（CollegeofCivilEngineering，F(xiàn)uzhouUniversity，F(xiàn)uzhou３５０１０８，F(xiàn)ujian，China）Abstract：Inordertograspthefeaturesofvibrationandseismicresponseofsemi‐integraljointlessskewbridge，afiniteelemen
4、tmodelofHuzhouGuanbianbridgewasestablishedwithMIDAS／Civil．Thedynamiccharacteristicanalysiswascarriedout，andtheresponsespectramethodandtimehistorywereconductedtoanalyzetheseismicresponseofsemi‐integraljointlessskewbridge．Theresultsshowthattheconstrainingeffectofsoilbehindtheabu
5、tmentisweakenedgraduallywiththedecreaseofskewangleofbridge．Theeffectofsoilbehindabutmentisbenefittosemi‐integralabutmentjointlessskewbridge，whichcanrestrictitslongitudinalfloateffectively．Theinternalforceofpierbottomanddisplacementofpiertopcalculatedwithresponsespectramethodar
6、eevenlargerthanthosewithtimehistoryanalysismethodduringseismicsafetyanalysis．Theseismicsafetyofthetypeofbridgeshouldbegovernedbythedisplacementofpiertopcausedbythefixedbearingwhileinputtingtheearthquakemotionperpendiculartocap．Thestudyresultsprovidereferencesdatafortheseismicd
7、esignandresearchofsemi‐integraljointlessskewbridgeandpromotethedevelopmentandactualengineeringapplicationofthesemi‐integraljointlessskewbridge．Keywords：semi‐integralabutmentjointlessskewbridge；dynamicresponsespectra；timehistoryanalysis；skewangle；abutment‐soilinteraction收稿日期：２０
8、１６‐１１‐０７基金項(xiàng)目：國(guó)家自然科學(xué)基金項(xiàng)目（５１２７８１２６，５１５７８１６１）；福建省自然科學(xué)基金項(xiàng)目（２０１３J０
