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时间:2020-03-25
《钢管混凝土拱桥强健性设计.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、88桥梁建设2016年第46卷第6期(总第241期)BridgeConstruction,V01.46,No.6,2016(TotallyNo.241)文章编号:1003—4722(2016)06—0088—06钢管混凝土拱桥强健性设计陈宝春1,范冰辉1,余印根2,吴庆雄1,黄冀卓1(1.福州大学土木工程学院,福建福州350108;2.福建福永工程技术有限公司,福建福州350011)摘要:为解决中、下承式钢管混凝土拱桥桥面系强健性不足的问题,从概念设计和结构设计的角度提出强健性设计的要点。总结结构强
2、健性的概念及其在桥梁工程中的应用,按严重程度将拱桥断索事故分为三级,据此提出吊杆不破断、桥面系在吊杆破断时不落梁的强健性设计要求。基于强健性将不同结构的桥面系分为五类,在此基础上对桥梁主结构的强健性设计提出建议:对于吊杆,应进行强健性设计对应的破坏安全极限状态设计计算;对于第四类桥面系,其加劲纵梁需要具备足够的刚度与承栽力;对于刚架系杆拱,应加强系杆的强健性设计,并应使下部结构具有足够的抗水平推力的安全储备。关键词:拱桥;钢管混凝土结构;桥面系;吊杆;主拱;强健性设计;破坏安全极限状态中图分类号:U
3、448.22;U442.5文献标志码:ARobustnessDesignofConcrete-FilledSteelTubeArchBridgesCHENBao-chun1,FANBing-hui1,ⅧYin-gen2,WUQing—xiong1.HUANGji—zhuo1(1.CollegeofCivilEngineering,FuzhouUniversity.Fuzhou350108。China:2.FujianFuyongEngineeringTechnologyCo.,Ltd.,Fuzhou
4、350011,China)Abstract:Toresolvetheproblemregardingtheinsufficientrobustnessofthefloorsystemsonthehalf—throughandthroughconcrete-filledsteeltubearchbridges,thehighlightsoftherobust—nessdesignarepresentedfromtheangleoftheconceptualdesignandstructuraldesi
5、gnandthecon—ceptofthestructuralrobustnessandtheapplyingoftheconcepttOthebridgeengineeringaresummedup.Thefailureofthehangerbreakingofthearchbridgesisclassifiedintothreelevelsac—cordingtOtheseveritydegreesofthefailureandfurtheraccordingtOtheclassificatio
6、n,therequire—mentsfortherobustnessdesignofthefloorsystemsunderthesituationsthatthehangersdonotbreakandthatthehangersbreak,butthegirdersdonotcollapsearesetforward.Intermsoftheconceptoftherobustness,thefloorsystemsofthedifferentstructuresareclassifiedint
7、ofivetypesandonthebasisoftheclassification,therobustnessdesignofthemainstructuresofthearchbridgesisproposed.Forthehangers,thefailuresafetylimitstatecorrespondingtOtherobustnessdesignshouldbedesignedandcalculated.Forthefloorsystemtypefour,thestiffenings
8、tringersofthefloorsystemshouldhavesufficientrigidityandbearingcapacityandfortherigid—frametiedarchbridge,therobustnessdesignofthetiemembersofthebridgeshouldbereinforcedandthesubstructureofthebridgeshouldbemadetOhavethesufficientsafetyma
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