溫度、滲流對混凝土大壩影響效應(yīng)研究

1、論文題目：溫度、滲流對混凝土大壩影響效應(yīng)研究專業(yè)：固體力學(xué)碩士生：曹海波（簽名）指導(dǎo)教師：張嘉凡（簽名）摘要隨著我國經(jīng)濟建設(shè)的發(fā)展，越來越多、越來越高的混凝土大壩拔地而起，水利工程在國民經(jīng)濟建設(shè)中的重要地位益發(fā)凸顯。滲流和溫度是影響混凝土大壩穩(wěn)定性的主要因素，必須深入研究對大壩應(yīng)力和位移的影響效應(yīng)，制定科學(xué)的防范措施，確保大壩安全運行。本文以公伯峽水電站進(jìn)水口5#壩段為分析對象，采用ABAQUS有限元大型工程軟件，分別運用單應(yīng)力場模塊、

2、應(yīng)力場和滲流場耦合模塊、應(yīng)力場和溫度場耦合模塊，建立了相應(yīng)的三維有限元分析模型，對混凝土壩的溫度場、應(yīng)力場及位移場進(jìn)行數(shù)值計算。分析不同水位對混凝土大壩位移的影響，確定大壩及壩基的塑性區(qū)、應(yīng)力集中區(qū)及應(yīng)力值最大區(qū)；得到大壩的孔隙壓力、揚壓力、應(yīng)力與位移隨水位的變化特性；研究大壩的溫度場、應(yīng)力場及位移場的分布規(guī)律。結(jié)果表明：滲流產(chǎn)生的孔隙壓力及揚壓力與溫度變化引起的溫度應(yīng)力都會對混凝土大壩的位移產(chǎn)生重要的影響。并將計算值與大壩監(jiān)測數(shù)據(jù)進(jìn)行

3、對比，分析滲流與應(yīng)力、溫度與應(yīng)力的耦合作用對壩體運行的影響效應(yīng)，揭示混凝土大壩產(chǎn)生位移的本質(zhì)原因，為大壩的安全評價提供了重要依據(jù)。關(guān)鍵詞：混凝土壩溫度滲流有限單元法研究類型：基礎(chǔ)應(yīng)用Subject:Subject:Subject:Subject:StudyStudyStudyStudyononononthethethetheEEEEffectffectffectffectssssofofofofTTTTemperatureemperat

4、ureemperatureemperatureSSSSeepageeepageeepageeepageononononCCCConcreteoncreteoncreteoncreteDDDDamamamamSpecialty:Specialty:Specialty:Specialty:SolidSolidSolidSolidMechanicsMechanicsMechanicsMechanicsName:Name:Name:Name:H

5、aiboHaiboHaiboHaiboCaoCaoCaoCao(S(S(S(Signatureignatureignatureignature)___________)___________)___________)___________Instruct:Instruct:Instruct:Instruct:Prof.JiafanProf.JiafanProf.JiafanProf.JiafanZhanZhanZhanZhan(S(S(

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7、nationaleconomyconstruction.Theseepagetemperaturehaveplayedacrucialroleonstabilityoftheconcretedams.Weshouldmakeafurtherstudyontheeffectofseepagetemperatureonthedamstressdisplacementastomakescientificmeasurestoensurethed

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10、lacementwasanalyzedtodeterminetheplasticareastressconcentrationareamaximumstressvalueareaofdamdamfoundationobtainedthevariationacterofcavitationpressureupliftpressuredisplacementwiththewaterlevelchangestudiedthedistribut

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