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1、⑧申請(qǐng)同濟(jì)大學(xué)工學(xué)碩士學(xué)位論文混雜配筋混凝土梁抗剪性能研究(國(guó)家自然科學(xué)基金資助項(xiàng)目,批準(zhǔn)號(hào)50178050)培養(yǎng)單位:一級(jí)學(xué)科:二級(jí)學(xué)科:研究生:指導(dǎo)教師:土木工程學(xué)院建筑工程系土木工程結(jié)構(gòu)工程梁志強(qiáng)屈文俊教授二Oo七年三月摘要鋼筋混凝土結(jié)構(gòu)已廣泛應(yīng)用于土木工程領(lǐng)域,其耐久性問(wèn)題也日益引起人們的關(guān)注。為了提灝鋼筋混凝土結(jié)構(gòu)的耐久性,學(xué)者們掇出了用纖維璦強(qiáng)漿會(huì)懿蘩(FRPBar)取戎建筑銹簸瑟擎瀑凝±續(xù)穩(wěn),毽癟于FRP簸熬彈性模鬟低和線(xiàn)彈性豹廢力一應(yīng)交關(guān)系,孕致FRP筋構(gòu)件的脆性破壞特征及使用狀態(tài)下過(guò)大的裂縫寬度和撓度,這魑缺點(diǎn)限制了它在士木工程領(lǐng)域的推廣應(yīng)用。作者導(dǎo)師提出的混雜配筋混凝
2、土構(gòu)件,既具有良好的i
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4、久性能,又克驤了FRP燕灄凝±攜終緩靂蝗能差懿獲煮。雋了競(jìng)鼴焦部鑲簸筋挺蘩銹疆,導(dǎo)致簸兩耐久性差豹弱點(diǎn),采用混雜配箍筋的方法迸行抗剪箍筋的配置。本文的主要目的是研究混雜混凝土梁的抗剪性能。通過(guò)6根混雜配筋混凝土粱和一根對(duì)比鋼筋混凝土梁的試驗(yàn),對(duì)混雜配筋混凝土梁在彎剪作用下的力學(xué)、使用性能進(jìn)行分析,研究混雜配筋混凝土梁和鋼筋混凝土梁撬剪瞧戇麴巽羈。逶避磚試驗(yàn)粱莰驁經(jīng)戇瓣試驗(yàn)分裁,提出了與鋼簸混凝±麓藕榴銜接鵑混雜醞翁混凝土梁藐剪承載能力及斜裂縫寬疫茲計(jì)算公式,為混雜配筋混凝土緒構(gòu)的推廣應(yīng)用,:璉}行了探索性的研究。力關(guān)鍵詞:混雜配筋混凝土梁,纖維增強(qiáng)聚合物筋,耐
5、久性,抗剪承載AbstractRCstructureshavebeenwidelyusedinthefieldofciviIengineering,anditsdurabilitygainsmoteandmoreattention.ToimprovethedurabilityofRCstructures,replacingsteelbarswithfiberreinforcedpolymerbars(FRPbars)inRCstructuresisproposedbyresearchers.Butthelowelasticmodulusandlinearelasticstress-str
6、ainrelationshipofFRPbarleadtothecharacteristicofbrittlefailureandtoolargecrackwidthanddeflectionofFRPbarreinforcedconcretecomponents.TheapplicationofFRPbarincivilengineeringisrest娃cted。Thehybridreinforcedconcretemembersproposedbythesuperviseroftheauthorhavetheadvantageofgooddurability,andovercomi
7、ngthedisadvantageofpoorserviceabilityofFRPstructures.TherustyofsteelstirrupsOccursfirstlyintheangleregionofthecrosssection,whichleadstopoorserviceabilityoftheconcretemembers.Hybridstirrupsaredisposaledtoovercomethisdisadvantage.Themainpurposeofthisthesisistostudytheshearperformanceofhybridreinfor
8、cedconcretebeams.Anexperimentalprogramiscarriedouttotestsixconcretebeamshybridreinforcedandonecontrolbeamreinforeedonlybysteelbars.Themechanicsandserviceperformanceofhybridreinforcedconcretebeamsundershearforceandbendingmomentisanalyzedandthecomparementofshearcapacitiesbetweenhybridreinforcedconc
9、retebeamsandRCbeamsiscarriedoutinthethesis。TheformulaforshearcapacityandcrackwidthofhybridreinforcedconcretebeamsareproposedbasedOBtheanalysisoftheexperiment,whichhaveagoodconnectionwithRCstructurecode.Itishopedthatthi