资源描述：
《钢-混结合段的极限承载力研究.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、第34卷第3期公路交通科技Vol．34No．32017年3月JournalofHighwayandTransportationResearchandDevelopmentMar．2017doi:10．3969/j．issn．1002-0268．2017．03．008钢-混结合段的极限承载力研究12霍学晋,程曦(1.中铁大桥勘测设计院集团有限公司,湖北武汉430053;2.清华大学土木水利学院,北京100084)摘要:采用ABAQUS软件建立精细有限元模型,考虑材料非线性和剪力钉的非线性荷载滑移关系及格室内混凝土的开裂与压碎,对4种不同构造的单格室模型进行非线性全过程分析,研究了3种传力构件
2、(承压板、PBL连接件、剪力钉)的传力比例及共同工作性能,并分析了格室内各构件在加载过程中的破坏顺序及破坏形态。结果表明:4种模型的受力过程和破坏形态各不相同,考虑承压板作用的模型1中腹板的屈服区域随着荷载的增大并未明显扩大,荷载达到17250kN时,屈服区域仍较小;当荷载较大时,随着传力构件的减小,滑移量曲线的斜率逐渐趋于竖直;3种传力构件中,承压板的直接承压作用能够有效地提高构件的极限承载力;只有PBL连接件时,各连接件的受力较为均匀。关键词:桥梁工程;钢-混结合段;非线性全过程分析;极限承载力;屈服荷载;混合梁桥中图分类号:U448．216文献标识码:A文章编号:1002-0268(
3、2017)03-0052-10StudyonUltimateBearingCapacityofSteel-concreteCompositeSegment12HUOXue-jin,CHENGXi(1.ChinaRailwayMajorBridgeReconnaissance&DesignInstituteCo.,Ltd.,WuhanHubei430053,China;2.SchoolofCivilEngineering,TsinghuaUniversity,Beijing100084,China)Abstract:Consideringthematerialnonlinearit,then
4、onlinearload-sliprelationshipofshearstuds,andcrackingandcrushingoftheconcreteincells,thefinefiniteelementmodelsof4single-cellmodelswithdifferentstructuralformsareestablishedusingABAQUSsoftware,thentheforcetransmissionratioandworkperformanceofbearingplate,PBLconnectorandshearstudsarestudied,andthed
5、amageorderandformsofthecomponentsincellsunderloadingareanalyzed.Theresultshowsthat(1)thefailureprocessesandpatternsofthe4modelsarenotidentical,theyieldregionofwebinmodel1isnotsignificantlyexpandedwithincreasingofloadwhentheroleofthebearingplateisconsidered,whentheloadreaches17250kN,theyieldareaiss
6、tillrelativelysmall;(2)whentheloadislarge,theslopeoftheslippagecurvetendstoslipverticalwiththedecreaseofforcetransmissioncomponent;(3)thedirecteffectofthepressurebearingplatecaneffectivelyimprovetheultimatebearingcapacityofthecomponentinthe3forcetransmissioncomponents;(4)theforcesoftheconnectingme
7、mbersismoreuniformwhenthePBLconnectorsareonlyset.Keywords:bridgeengineering;steel-concretecompositesegment;nonlinearfull-rangeanalysis;ultimatebearingcapacity;yieldload;hybridgirderbridge用日益增多,而作为关键构件的钢-混结合段,目0引言
