混凝土面板堆石坝模糊有限元变位分析
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摘要
考虑堆石材料邓肯E B模型中试验参数的模糊性,将堆石材料参数K、n、Rf、Kb、m设为三角模糊数,采用模糊有限元法计算分析了模糊数不同水平截集下混凝土面板堆石坝的模糊位移场,研究结果表明,堆石材料参数的模糊性对于坝体变位影响很大,设计中不能忽视.另外,用模糊有限元计算混凝土面板堆石坝的坝体变位,计算成果包含大量信息,从中不仅可以得到某点位移的变化范围,还可以得到位移为某一取值时的隶属度,从而为面板堆石坝设计和大坝的安全性判别提供重要参考.
As fuzziness of mechanic parameters of Duncan E-B model for rockfill is considered, the parameters of rockfill material such as K、n、R_f、K_b、m are supposed as trigonometric fuzzy number, and fuzzy finite element method is employed for computing and analyzing fuzzy deformation field of concrete face rockfill dam (CFRD) under the different horizontal intercept. The research findings show that the fuzzy mechanic parameters can produce great effect on the deformation of CFRD, therefore should not be ignored. Also, fuzzy finite element method is applied for computing the deformation of CFRD, and the calculating results contain much information through which not only the displacement's scale of any nod and but also its subordination are obtained, therefore this can help the design of CFRD and its security authentication.
As fuzziness of mechanic parameters of Duncan E-B model for rockfill is considered, the parameters of rockfill material such as K、n、R_f、K_b、m are supposed as trigonometric fuzzy number, and fuzzy finite element method is employed for computing and analyzing fuzzy deformation field of concrete face rockfill dam (CFRD) under the different horizontal intercept. The research findings show that the fuzzy mechanic parameters can produce great effect on the deformation of CFRD, therefore should not be ignored. Also, fuzzy finite element method is applied for computing the deformation of CFRD, and the calculating results contain much information through which not only the displacement's scale of any nod and but also its subordination are obtained, therefore this can help the design of CFRD and its security authentication.
引文
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[2] 钱家欢,殷宗泽.土工原理与计算[M].北京:中国水利水电出版社,1996:54 59QianJiahuan,YinZongze.Fundamentalandcalculationingeotechnicalengineering[M].Beijing:HydropowerandHydroelectricPublishingHouse,1996:54 59
[3] 刘宝碇,赵瑞清.随机规划与模糊规划[M].北京:清华大学出版社,1998:15 25LiuBaoding,ZhaoRuiqing.Randomprogrammingandfuzzyprogramming[M].Beijing:TsinghuaUniversityPublishingHouse,1998:15 25
[4] 吕恩琳.结构模糊有限元平衡方程的一种新解法[J].应用数学与力学,1997,18(4):26 32LuEnlin.Anewsolutiontostructuralfuzzyfiniteelementequilibriumequations[J].AppliedMathematicsandMechanics,1997,18(4):26 32
[5] 栾茂田,吴兴征.堆石料动力特性参数对面板堆石坝三维非线性地震响应的影响[J].水力发电学报,2001,(1):7 18LuanMaotian,WuXingzheng.Effectsofdynamicpropertiesofrock fillsonnonlinearseismicresponseofconcretefacerock filldam[J].JournalofHydroelectric,2001,(1):7 18
[6] 吴兴征,周晓光.鱼跳混凝土面板堆石坝三维静力应力变形分析[J].中国水利水电科学研究院学报,2003,(1):75 80WuXingzheng,ZhouXiaoguan.Analysisofthree dimensionalstaticstressdeformationonYutiaoconcreterock filldam[J].JournalofChineseHydropowerandHydroelectricAcademe,2003,(1):75 80
[7] 介玉新,高波.无单元法在混凝土面板堆石坝应力分析中的应用[J].清华大学学报,2003,(8):1092 1095JieYuxin,GaoBo.Element freemethodforstress strainanalysisofconcretefacerock filldam[J].JournalofTsinghuaUniversity,2003,(8):1092 1095
[8] 彭宣茂,李太生.混凝土面板堆石坝三维仿真分析[J].岩土力学,2003,(5):767 770PengXuanmao,LiTaisheng.Three dimensionalsimulationanalysisofconcretefacerock filldam[J].RockandSoilMechanics,2003,(5):767 770
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