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《銹蝕鋼筋混凝土梁抗剪承載力預(yù)測(cè)經(jīng)驗(yàn)?zāi)P汀酚蓵?huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在教育資源-天天文庫(kù)。
1、文章編號(hào):CSTAM2014-P47.E0093銹蝕鋼筋混凝土梁抗剪承載力預(yù)測(cè)經(jīng)驗(yàn)?zāi)P捅R朝輝1,李海1,4趙衍剛17柳世濤27LiChun.Qing3(I中南大學(xué)土木工程學(xué)院,湖南長(zhǎng)沙410075;2上海中建建筑設(shè)計(jì)院有限公司,上海200122;3SchoolofCivil,EnvironmentalandChemicalEngineering,RMITUniversity,Melbourne,3001,Australia)摘要:本文總結(jié)了172組銹蝕鋼筋混凝土梁抗剪承載力試驗(yàn)數(shù)據(jù),并利用這些數(shù)據(jù)與
2、現(xiàn)有的承載力計(jì)算模型的預(yù)測(cè)值進(jìn)行了對(duì)比分析研究,結(jié)果表明:現(xiàn)有的計(jì)算模型對(duì)銹蝕鋼筋混凝土梁抗剪承載力的估計(jì)是偏于保守的,且離散性較大。本文基于歐洲規(guī)范的抗剪承載力公式,考慮銹蝕后鋼筋的屈服強(qiáng)度、銹蝕后梁截面有效寬度、箍筋銹蝕對(duì)箍筋承擔(dān)剪力部分的折減、縱筋銹蝕對(duì)混凝上承擔(dān)剪力部分的折減等影響因素,提出了集中荷載下有腹筋梁銹蝕后抗剪承載力預(yù)測(cè)經(jīng)驗(yàn)?zāi)P?,該?jīng)驗(yàn)?zāi)P陀?jì)算值與試驗(yàn)結(jié)果吻合較好,為銹蝕鋼筋混凝+梁抗剪承載力的預(yù)測(cè)和評(píng)估提供了更有效的計(jì)算方法。關(guān)鍵詞:腐蝕;鋼筋混凝土梁:抗剪承載力;經(jīng)驗(yàn)?zāi)P停粒樱眨牵牵牛樱裕?/p>
3、DEMPIRICALMODELCORRODEDRCFORSHEARCAPACITYOFBEAMSLUZhao—Huil,LiHail,*ZHAOYah.Gan91,LIUShi—Ta02,LiChun—Qin93(1.SchoolofCivilEngineering,CentralSouthUniversity,Changsha,410075,China;2.ShanghaiZhon自ianArchitecturalDesigninstituteCo,Ltd,Shahghai,200122,China
4、;3.SchoolofCivil,EnvironmentalandChemicalEngineering,RMITUniversity,Melbourne,3001,Australia)Abstract:Inthispaper,atotalof172experimentaltestsdataofcorrodedreinforcedconcrete(RC)beam,publishedintheliteraturewassummarized.Comparativestudiesbetweentheexp
5、erimentalresultsandthepredictionsoftheexistingempiricalmodelofshearcapacityofcorrodedRCbeamswerecarriedout.Resultsshowthattheexistingmodelsunderestimatetheshearcapacityofthecorrodedbeamandthescatterislarge.Basedontheseinvestigations,anewempiricalmodelfors
6、hearstrengthofcorrodedRCbeamsundercentralizedloaddevelopedfromEurocode2wasproposed,inwhichtheimportantfactorssuchastheyieldstrengthofcorrodedsteelbar,effectivecross—sectionwidthofrustgirder,andthereductionofshearstrengthduetothecorrosionofstirrupandlongit
7、udinaltensilereinforcementweretakenintoaccount.AnapplicationofthenewempiricalmodeltopublishedexperimentaldatademonstratesthatthepresentmodelgivesoftheshearcapacityofcorrodedRCbeams.Keywords:Corrosion;RCbeams;Shearcapacity;Empiricalmodel引言-251agoodrepresent
8、ation在絕大部分鋼筋混凝土受彎構(gòu)件中,箍筋的保護(hù)層相對(duì)縱筋較薄,且箍筋直徑較小,箍筋往往會(huì)比縱筋銹蝕嚴(yán)重[】]。已有試驗(yàn)研究‘21表明,隨著鋼筋銹蝕率的增加,混凝十梁的破壞形式會(huì)從彎曲破壞轉(zhuǎn)變?yōu)榛痦?xiàng)目:國(guó)家自然科學(xué)基金資助項(xiàng)目(U1134209;51008313),長(zhǎng)江學(xué)者和創(chuàng)新團(tuán)隊(duì)發(fā)展計(jì)劃(IRTl296)作者簡(jiǎn)介:盧朝輝(1976.),男,湖南永州人,副教授,博士,豐要從事結(jié)