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1、第34卷第1O期鐵道學報Vo1．34No．102012年1O月JOURNALOFTHECHINARAILWAYS0CIETYOctober2O12文章編號：1001—8360(2012)10—0097～06內(nèi)嵌預應力螺旋肋鋼絲加固混凝土梁變形特性研究丁亞紅，張美香。，孫博，曾憲桃(L河南理工大學土木工程學院，河南焦作454003；2．新余學院建筑與規(guī)劃學院，江西新余338000)摘要：針對原有加固方法的不足，提出內(nèi)嵌預應力螺旋肋鋼絲加固混凝土梁加固技術，分析這種加固梁的變形特點，并依據(jù)普通鋼筋混凝土梁的變形原理和內(nèi)嵌預應力螺旋肋鋼絲加固混凝土梁的特點，推導內(nèi)
2、嵌預應力螺旋肋鋼絲加固梁不同受力階段的剛度表達式，得到內(nèi)嵌預應力螺旋肋鋼絲加固梁的剛度計算公式。在考慮預加力產(chǎn)生反拱的前提下，計算加固梁不同受力階段的變形量。對4根內(nèi)嵌預應力螺旋肋鋼絲加固混凝土梁進行了試驗驗證。結(jié)果表明：試驗結(jié)果與計算結(jié)果吻合較好，內(nèi)嵌預應力螺旋肋鋼絲加固混凝土梁能有效延緩裂縫的發(fā)展，減小構(gòu)件變形，提高構(gòu)件剛度。研究結(jié)果為該加固方法在工程實際中的應用提供了理論依據(jù)。關鍵詞：混凝土；預應力；內(nèi)嵌加固；螺旋肋鋼絲；變形中圖分類號：U448．35文獻標志碼：Adoi：10．3969／j．issn．1001—8360．2012．10．016Rese
3、archonDeformationofReinforcedConcreteBeamEmbeddedwithPrestressedHelicalRibSteelWiresDINGYa—hong，ZHANGMei—xiang～，SUNBo，ZENGXian—tao(1．SchoolofCivilEngineering，HenanPolytechnicUniversity，Jiaozuo454003，China；2．SchoolofArchitectureandUrbanPlanning，XinyuUniversity，Xinyu338000，China)Abst
4、ract：Aimingatmakingupthedeficienciesoftheconventionalconcretereinforcementmethods，therein—forcementtechnologyadoptingprestressedhelicalribstee1wiresbondedinsawedgroovesintheconcretecoursewaspresented．ThedeformationcharacteristicsofSOreinforcedconcretebeamswereanalyzed．Onthebasisofs
5、uchbeamdeformationcharacteristicsandthedeformationprincipleofordinaryreinforcedconcrete(RC)beams，thestiffnessexpressionsoftheRCbeamsembeddedwithprestressedhelicalribsteelwiresindifferentstress—ingstageswerederivedandthestiffnesscalculationformulasoftheRCbeamsembeddedwithprestressed
6、heli—calribsteelwireswereset．Underthepremisethatinvertedarchsweregeneratedinprestressing，themagni—tudesofdeformationoftheRCbeamsembeddedwithprestressedhelicalribsteelwiresindifferentstressingstageswerecalculated．TestsweremadewithfourRCbeamsembeddedwithprestressedhelicalribsteelwire
7、s．Thetestresultsandcalculationresultsshowgoodagreement．TheRCbeamembeddedwithprestressedhelicalribsteelwirescaneffectivelydelaydevelopmentofcracks，reducememberdeformationandstrengthenmemberstiffness．Theresearchresultslayatheoreticalbasisforapplicationofthenewreinforcementmethodineng
8、ineeringpractice．Keywords：
