大跨径斜拉桥组合梁节段匹配制造足尺模型试验.pdf

《大跨径斜拉桥组合梁节段匹配制造足尺模型试验.pdf》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、桥梁建设2014年第44卷第3期(总第226期)BridgeConstruction，Vo1．44，No．3，2014(TotallyNo．226)75文章编号：1003—4722(2014)03～0075—06大跨径斜拉桥组合梁节段匹配制造足尺模型试验张鸿，田唯，王敏，郑和晖(1．中交第二航务工程局有限公司，湖北武汉430040；2．长大桥梁建设施工交通行业重点实验室，湖北武汉430040)摘要：泉州湾跨海大桥主桥为(7O+130+400+130+70)m双塔分幅式组合梁斜拉桥，组合梁整体节段

2、间桥面板采用匹配预制工艺，并通过钢梁反拱为桥面板提供横向预应力。为验证该桥组合梁整体节段匹配制造工艺可行性、掌握梁段经历横向反拱后的回弹规律，选取5个梁段进行组合梁足尺模型试验，并与有限元模型理论值进行对比分析。结果表明：所采用的整体节段匹配制造工艺及横向反拱设备是可行的；钢梁反拱至17～18mm时可为桥面板预存1．5～3MPa压应力，梁段在经历横向反拱过程后，将为组合梁节段桥位横向匹配连接累积不大于1．5mm的不利误差，这些数据将为实桥后续梁段匹配制造及安装施工参数的确定提供依据。关键词：斜拉

3、桥；组合梁；整体节段；匹配制造；横向反拱；有限元法；足尺模型；模型试验中图分类号：U448．27；U446．1文献标志码：AFull-ScaleModelTestsforMatchingFabricationofCompositeGirderBlocksofLongSpanCable‘StayedBridgeZHANGHong，TlANWei，wANGMin2，ZHENGHe—hui2(1．CCCCSecondHarborEngineeringCo．，Ltd．，Wuhan430040，China

4、；2．KeyLaboratoryforCon-structionofLongSpanandMajorBridgesofMinistryofTransport，Wuhan430040，China)Abstract：ThemainbridgeofQuanzhouBaySea—CrossingBridgeisacompositegirdercable—stayedbridgewithdoublepylons。separateddecksandwithspanarrangement(70+130+400

5、+130+70)m．Theintegralblocksanddeckslabsofthecompositegirderofthebridgewerefabri—cated，usingtheworkmanshipofmatchingfabricationandthetransverseprestressofthedeckslabswasprovidedbytheinvertedcamberingofthesteelgirder．Tocheckthefeasibilityoftheworkmansh

6、ipforthefabricationofthecompositegirderblocksandtomasterthereboundinglawoftheblocksaftertheblockswentthroughthetransverseinvertedcambering，5integralblockswereselected．thefull—scalemodeltestsweremadeandthetestswereanalyticallycomparedtothetheoreticval

7、uesofthefiniteelementmode1．Theresultsofthecomparisonindicatethattheworkmanshipforthefabricationoftheblocksandthetransverseinvertedcamberingequipmentusedinthefabricationarefeasible．Theinvertedcamberingofthesteelgirderto17～18mmcanreserve1．5～3．0MPacompr

8、essivestressforthedeckslabs．Afterexperiencingtheinvertedcambering。theblockswillcumulateunfavorableerrorsthatarenotgreaterthan1．5mmforthetransversematchingjointsofthecompositegirderandtheseerrordatawillprovidebasisforde—terminingtheconstructionparamet