欢迎来到天天文库
浏览记录
ID:33645111
大小:396.04 KB
页数:6页
时间:2019-02-27
《钢-混凝土连续组合桁梁桥受力性能优化》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、学兔兔www.xuetutu.com桥梁建设2012年第42卷第6期(总第217期)BridgeConstruction,Vo1.42,No.6,2012(TotallyNo.217)57文章编号:1003—4722(2012)06—0057—06钢一混凝土连续组合桁梁桥受力性能优化张振学,聂建国。,陶慕轩。,朱力(1.河北工业大学土木工程学院,天津30040l;2.清华大学土木工程系土木工程安全与耐久教育部重点实验室,北京100084)摘要:为有效改善钢一混凝土连续组合桁梁桥负弯矩区受力性能,以天津海河吉兆桥为例,总结连续组合桁梁桥的主要设计难点,并对传统的
2、解决方案进行评述,在此基础上提出综合采用部分组合技术、双重组合技术以及优化施工工序3项措施对吉兆桥进行优化设计。采用MIDASCivi1软件建立吉兆桥边上1榀组合桁架有限元模型,进行施工全过程分析,检验3项优化措施的有效性。对比分析结果表明,采用此3项技术措施可使混凝土桥面板在荷载短期效应组合下始终受压,下弦杆钢板最大压应力相比不灌混凝土方案降低了约25。可见,合理采用此3项技术措施可显著降低钢一混凝土连续桁梁桥负弯矩区混凝土桥面板的拉应力和下弦杆钢板的压应力,从而有效避免混凝土桥面板开裂,改善下弦杆的稳定性。关键词:连续桁梁桥;钢一混凝土组合结构;受力性能;
3、优化;技术措施;有限元法■~中图分类号:U448.38文献标志码:AOptimizationofMechanicalBehaviorofSteelandConcreteContinuousCompositeTrussGirderBridgeZHANGZhen—xue,NIEJian—guo。,TAOMu—xuan,ZHULi(1.SchoolofCivilEngineering,HebeiUniversityofTechnology,Tianjin300401,China;2.KeyLaboratoryofCivilEngineeringSafetyandDu
4、rabilityofMinistryofEducation,DepartmentofCivilEngineering,TsinghuaUniversity,Beijing100084,China)Abstract:Toeffectivelyimprovethemechanicalbehaviorofthehoggingmomentareaofthesteelandconcretecontinuouscompositetrussgirderbridge,theJizhaoBridgeoverHaiheRiveinTianjinwascitedasanexampl
5、e.Themajordesigndifficultiesofthecompositetrussgirderbridgeweresummarizedandtheconventiona1solutionstothedifficultieswerecommented.Basedonthesummarizationandcomments,threemeasuresofthepartialcompositetechnique,doublecompos—itetechniquesandoptimizedconstructionsequenceswereproposedfo
6、rtheoptimaldesignoftheJizhaoBridge.ThesoftwareMIDASCivi1wasusedtosetupthefiniteelementmodelforasidecompositetrussofthebridge,thewholeconstructionprocessofthebridgewasanalyzedandtheeffectivenessofthethreemeasureswaschecked.Theresultsofcomparativeanalysisrevealthattheapplicationofthet
7、hreemeasurescankeeptheconcretedeckslabsincompressionallthetimeundertheshort—termcombinationofloadeffectandcanmakethemaximumcompressivestressinthesteelplatesofthelowerchordreducedbyabout25ascomparedtothedesignschemethattheconcreteiSnotcast.ItiSknownherewiththattherationalapplicationo
8、fthemeasurescansign
此文档下载收益归作者所有