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1、基于子模型法的混凝土面板堆石壩應(yīng)力變形數(shù)值分析基于子模型法的混凝土面板堆石壩應(yīng)力變形數(shù)值分析#孫超偉1，柴軍瑞1,2，陳興周1**510152025303540（1.西安理工大學(xué)水利水電學(xué)院，西安710048；2.三峽大學(xué)土木水電學(xué)院，湖北宜昌443002）摘要：采用非線性有限單元法，并基于鄧肯-張（E-B）非線性本構(gòu)模型，考慮面板堆石壩填筑施工與蓄水過程，利用中點(diǎn)增量法對苗家壩面板堆石壩進(jìn)行了三維有限元數(shù)值仿真分析，得到了壩體施工期和蓄水期壩體的應(yīng)力變形分布規(guī)律，從壩體結(jié)構(gòu)意義上判斷，堆石壩
2、體工作是可靠的；為了獲得面板及其接縫應(yīng)力變形更為精確可靠的結(jié)果，采用發(fā)展的三維子模型方法，而面板與墊層區(qū)之間的特殊邊界用耦合的薄層單元進(jìn)行模擬；工程算例的計算結(jié)果表明，面板應(yīng)力和變形規(guī)律正常，面板豎縫和周邊縫變形值不大，面板的安全性是比較有保障的。同時進(jìn)一步驗證了用耦合的薄層單元模型模擬接觸面的子模型法在面板子區(qū)計算中具有一定的可行性和可靠性。關(guān)鍵詞：混凝土面板堆石壩；鄧肯-張E-B模型；耦合的薄層單元；三維子模型法；應(yīng)力變形；中圖分類號：TV311Numericalanalysisofstres
3、sanddeformationofconcretefacerockfilldambasedonthesub-modelingmethodSUNChaowei1,CHAIJunrui1,2,CHENXingzhou11.CollegeofHydraulicandHydropowerEngineering,Xi'anUniversityofTechnology,Xi'an710048;2.CollegeofCivilandHydroelectricEngineering,ChinaThreeGorge
4、sUniversity,HuBeiYiChang443002Abstract:Inthispaper，thefollowingworksaredone.Themid-pointincrementalmethodisusedtosimulateaCRFDprojectcalledMiaojiababy3DFEManalysisbasedonDuncan-ChangE-Bnonlinearconstitutivemodelanditsfillingconstructionandretainingwat
5、erprocessisalsoconsidered.Asaresult,acorrespondinggenerallawofthedam’sstressanddeformationdistributionduringtheconstructionandstorageperiodisobtained,Judgingfromtheviewofthedamstructure,therockfilldambodyworksreliably.Inordertogetmoreaccurateresultsof
6、thefaceanditsjoints’stressanddeformation,thedeveloped3Dsub-modelmethodisappliedtothecalculationwiththecouplingthin-layerelementtosimulatethespecificboundarybetweenfaceandcushion.Accordingtotheresultsofengineeringexample,thestressanddeformationdistribu
7、tionofthedamconformstothegenerallaw.Theconcretefacealsohasanormalstressanddeformationlaw.Thedeformationoftransversejointsandperipheraljointsissmall,whichindicatesthattheconcretefaceworkswellandsafely.Atthesametime,itisfurtherlyprovedthatthesub-modelin
8、gmethodwiththecouplingthin-layerelementtosimulatethecontactfaceisfeasibleandbelievable.Keywords:concretefacerockfilldam;Duncan-Chang（E-B）model;couplingthin-layerelement;3Dsub-modelingmethod;stressanddeformation0引言混凝土面板堆石壩是以分塊拼接的鋼筋混凝土面板作為防滲結(jié)構(gòu)，堆
