已有裂缝重力坝加高后的工作性态
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摘要
基于瞬态温度场和徐变应力有限元法,对某重力坝加高工程的温度场与应力场进行有限元仿真计算。对老坝体纵向裂缝和新老混凝土接合面的接触问题采用有限元混合法进行模拟,重点分析老坝体纵向裂缝产生的原因,研究坝体加高后对老坝体纵向裂缝以及坝体关键部位的影响,对大坝的加高工程具有一定的参考价值。
Based on the finite element method of transient temperature fields and creep stress,finite element simulation analysis of the temperature field and stress field of the heightening process of a gravity dam is carried out.Contacting problems of the longitudinal cracks in the original dam and the adjoining face between old and new concrete are simulated with the mixed finite element method.The causes of longitudinal cracks are analyzed.The effects on the longitudinal cracks in the original dam and the key parts of the dam after heightening are also studied,and provide a certain reference value for other gravity dam heightening projects.
Based on the finite element method of transient temperature fields and creep stress,finite element simulation analysis of the temperature field and stress field of the heightening process of a gravity dam is carried out.Contacting problems of the longitudinal cracks in the original dam and the adjoining face between old and new concrete are simulated with the mixed finite element method.The causes of longitudinal cracks are analyzed.The effects on the longitudinal cracks in the original dam and the key parts of the dam after heightening are also studied,and provide a certain reference value for other gravity dam heightening projects.
引文
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[7]KIKUHCI N.A smoothing technique for reduced integrationpenalty methods in contact problems[J].International Journalfor Numerical Methods in Engineering,1982,18:343-350.
[8]雷晓燕,SWOBODE G,杜庆华.接触摩擦单元的理论及其应用[J].岩土工程学报,1994,16(3):23-32.
[9]邵伟,金锋,王光伦.用于接触面模拟的非线性薄层单元[J].清华大学学报:自然科学版,1999,39(2):34-38.
[10]HAUG D,SAXCE G.Frictionless contact of elastic bodies byfinite element method and mathematical programmingtechnique[J].Computers Structures,1980(11):55-67.
[11]赵兰浩.考虑坝体-库水-地基相互作用的有横缝拱坝地震响应分析[D].南京:河海大学,2006.
[12]赵兰浩,李同春,牛志伟.坝体-库水动力相互作用的数值求解格式[J].河海大学学报:自然科学版,2008,36(4):491-495.
[13]肖汉江,李祖民.大坝加高试验温度应力仿真计算与原型监测对比分析[J].长江科学院院报,2002,19(S1):54-56.
[2]张国新,朱伯芳,吴志朋.重力坝加高的温度应力问题[J].水利学报,2003(5):11-15.
[3]朱伯芳.有限单元法原理与应用[M].2版.北京:中国水利水电出版社,2000.
[4]杨庆生,李春江,弓俊清.大体积混凝土凝固过程的温度和应力仿真与控制[J].北京工业大学学报,2007,33(9):948-953.
[5]王水林,邓建辉,葛修润.改进的拉氏乘子法在接触摩擦问题中的应用[J].岩土工程学报,1998,20(5):64-67.
[6]SIMOJ C,WRIGGER P,TAYOR R L.Aperturbed lagrangianformulationfor the finite element solution of contact problems[J].Computer Methodsin Applied Mechanics and Engineering,1985,50:163-180.
[7]KIKUHCI N.A smoothing technique for reduced integrationpenalty methods in contact problems[J].International Journalfor Numerical Methods in Engineering,1982,18:343-350.
[8]雷晓燕,SWOBODE G,杜庆华.接触摩擦单元的理论及其应用[J].岩土工程学报,1994,16(3):23-32.
[9]邵伟,金锋,王光伦.用于接触面模拟的非线性薄层单元[J].清华大学学报:自然科学版,1999,39(2):34-38.
[10]HAUG D,SAXCE G.Frictionless contact of elastic bodies byfinite element method and mathematical programmingtechnique[J].Computers Structures,1980(11):55-67.
[11]赵兰浩.考虑坝体-库水-地基相互作用的有横缝拱坝地震响应分析[D].南京:河海大学,2006.
[12]赵兰浩,李同春,牛志伟.坝体-库水动力相互作用的数值求解格式[J].河海大学学报:自然科学版,2008,36(4):491-495.
[13]肖汉江,李祖民.大坝加高试验温度应力仿真计算与原型监测对比分析[J].长江科学院院报,2002,19(S1):54-56.
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