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ID:36496493
大小:1.19 MB
页数:5页
时间:2019-05-11
《刚架拱桥横系梁加固技术研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、桥梁建设2012年第42卷第6期(总第217期)BridgeConstruction.Vo1.42,No.6,2012(TotallyNo.217)45文章编号:1003—4722(2012)06—0045—05刚架拱桥横系梁加固技术研究黄德耕,罗吉智,谭洪河,谢肖礼(1.广西壮族自治区交通规划勘察设计研究院,广西南宁530011;2.广西大学土木建筑工程学院,广西南宁530004)摘要:钦州市钦江二桥主桥为3×63m钢筋混凝土刚架拱桥,针对该桥横系梁的病害及病因,采用附加型钢梁加固法对刚架拱桥
2、横系梁进行加固,具体做法是,旧的横系梁不用拆除,新附加的型钢梁端部通过高强螺栓与拱肋对穿连接。对该桥加固前、后动力性能和稳定承载能力进行对比分析,结合加固后桥梁成桥试验结果,得到以下结论:所采用的计算模型和实际情况相吻合;附加型钢梁加固法能够提高桥梁的横向刚度、改善桥梁的动力性能、提高桥梁的稳定承载力,可推广应用于刚架拱桥横系梁加固。关键词:刚架拱桥;横系梁;加固技术;动力性能;稳定承载力中图分类号:U445.72文献标志码:AResearchofStrengtheningTechniquesf
3、orCrossTieBeamsofaRigid-·FrameArchBridgeHUANGDe-geng,LUOji—zhi,TANHong—he,XIEXiao—li(1.GuangxiTransportPlanning,SurveyandDesignInstitute,Nanning530011,China;2.CollegeofCivilEngineeringandArchitecture,GuangxiUniversity,Nanning530004,China)Abstract:The
4、mainbridgeoftheSecondQinjiangRiverBridgeinQinzhouCityis3×63一mspanreinforcedconcreterigid—framearchbridge.Inthelightofthedeteriorationandcausesofthedeteriorationofthetiebeamsofthebridge,thetiebeamswerestrengthenedbythestrengtheningmethodofaddingofthes
5、ectionalsteelbeams.Thespecificwaysofthestrengtheningwerethattheexistingtiebeamswerenotremoved.thenewsectionalsteelbeamswereaddedandwerecon—nectedwiththearchribsbyboltsattheendsofthebeams.Thedynamicpropertiesandstabilitycarryingcapacityofthebridgebefo
6、reandafterstrengtheningwerecomparedandanalyzed.Inac—cordancewiththetestingofthestrengthenedbridge,thefollowingconclusionsaredrawn,i.e.,themodelcalculationofthebridgeisagreeablewiththeactualconditions.Thestrengtheningofthebridgebythemethodasmentionedc
7、anincreasethetransverserigidityofthebridge,improvethedynamicpropertiesandstabilitycarryingcapacityandcanbepopularizedtothestrengtheningofthecrosstiebeamsofotherrigid—framearchbridges.Keywords:rigid—framearchbridge;crosstiebeam;strengtheningtechnique;
8、dynamicprop—erty;stabilitycarryingcapacity1工程概况m,全桥长422m。主桥为3x63m的钢筋混凝土钦州市钦江二桥位于钦州市区东侧,跨越钦江,刚架拱桥,钦州岸、合浦岸引桥分别为5×16m、9×建于1998年,桥跨组合为(5×16+3×63+9×16)16m的钢筋混凝土空心板桥。主桥分上、下双幅设收稿日期:2012—08—01基金项目:广西交通厅科技项目计划(2010—109—06)ProgramofScienceandTechnologyProjecto
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