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ID:33103460
大小:8.24 MB
页数:88页
时间:2019-02-20
《大跨度铁路系杆拱桥成桥状态和施工过程的受力性能分析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、摘要xJ特大桥是南J’线l。的一庸烈线铁路提篮系杆拱桥,全长为618.3m,主桥孔跨布置为(402+52+382+52+4815)m,拱脚中心距450m。本文对该桥成桥状态以及施]一过样进{]:分析,f二要l:作和成粜如F:1根据xJ桥的特点,应Hj软什MfDAS建立r三个恒载作盯Fn勺窄f目j有限元模型,分别用于拱肋自重,桥『}『i系与吊杆自重,二潮恒载作J{j下的分析,得到该桥恒载作片jF的变形和受力状态。2完成了各种最不利活载作用下的分析、温度荷载和风特载等附加力作用下的分析。结果表叫,该桥静活载作用下的挠跨比为1/230I,刚度满足要求:各种衙载组合作用下桥
2、梁整体应力水平不高,强度整体满足要求。3完成了成桥状态的稳定。陀分析和动力性能分析。桥梁并l:要工况稳定系数均大于10,稳定性能良好:脯五阶自振频率均在o35~070之问,动力性能良好。4完成了施工过程的静力分析和稳定性分析,包括拱肋拼装、桥面系拼装和吊杆终张调索等符阶段。提II{九埘种终张调索方案。施工过程巾,备构件应力均较小,稳定性满足要求,两种终张调索方案均n,行。本文的研究成果为xJ桥的设计和施L提供了依据,也可供其他类似桥梁的设计耵『施工参考。关键词系杆拱桥,受力。盹能分析,成桥状态,施工过程ABSTRACTXJBridgeatZhaoqingisatie
3、d—archbridgewithspanarrangement(402+52书82+52+48.15)mandarchfeetcenterdistance450m,whichallowstworailwaylinesMechanicalbehaviorsofXJBridgeinthefinishedstateandconstructionstatesisanalyzedinthispaper.Worksandresultsofthispaperisasfollows:lConsideringthecharacteristicsofthebridgeXJ,theapp
4、licationofthefiniteelementanalysissoftwareMIDASestablishedthreedifferentspacefiniteelementmodel,respecfiveiyappliedforthearchribself-respect,bridgedeckdepartmentandtheselgrespect,thesecondphaseoftheconstantloadanalysisTothethreemodelcalculationresultsstack.getⅪbridgeunderconstantloadth
5、estressstate2ThebridgetoXJcompletevariousvaluethemostunfavorableundertheinfluenceofliveloadanalysis,temperatureloadandwindloadadditionalforcesanalysisTheresultsshowthatthebridgestaticunderthejnfluenceoflive】oadacrossthenaothanto112301’stifmessmeettherequirements;Allkindsofloadcombinati
6、onbridgeundertheactionofthewholestresslevelisnothigh,strengthwholemeettherequirements.3ThebridgetoXJbridgestateofthestabilityandthedynamicperformanceanalysisThemainbridgestabilitycoefficientwereworkingmorethan10,stableperformanceisgood;Thenaturalfrequencyofvibrationofthebridgemeetdrivi
7、ngsafetyrequirements,gooddynamicperformance4ToXJbridgeconstructionprocessanalysisIncludingthebridgedeckisassembled,archribconstructionandtheboomtheendofeachstage,suchascablePutforwardtwoendofthecabletwoschemesTheconstructionprocess,stresscomponentsaresmaller,stabilitymeettherequireme
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