混凝土拱坝位移确定性监控模型研究
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摘要
在缺乏坝体温度监测资料条件下,如何建立位移确定性模型是一个值得探讨的问题。针对运行期混凝土拱坝变形特点,在三维有限元数值分析方法的基础上提出在以气温和水温确定大坝温度边界时校验拱坝温度场的新方法,分别计算其水压和温度位移分量,从而建立混凝土拱坝的位移确定性模型。以东江拱坝为例,建立典型测点位移确定性模型且与实际观测位移资料进行对比,研究结果表明由此建立的位移确定性模型能够有效分离温度、水压以及时效等位移分量,精度且预测效果较好。这为我国大部分缺乏坝体温度监测资料的混凝土拱坝安全监控提供了一个新的思路。
The deterministic model for concrete arch dam displacement is a problem to be studied in the absence of measured temperature data. According to the deformation characteristics of concrete arch dam in the operation period,a new method is proposed to check the dam temperature field when the temperature boundary is determined by air temperature and water temperature. the FEM is applied to determine the water pressure component and temperature component of displacement in concrete arch dams by using the atmospheric temperature and reservoir water temperature as the temperature boundary condition. On this basis,a deterministic displacement monitoring model for concrete arch dam is established. The model is successfully applied to the establishment of the monitoring system for the Dongjiang Arch Dam.
The deterministic model for concrete arch dam displacement is a problem to be studied in the absence of measured temperature data. According to the deformation characteristics of concrete arch dam in the operation period,a new method is proposed to check the dam temperature field when the temperature boundary is determined by air temperature and water temperature. the FEM is applied to determine the water pressure component and temperature component of displacement in concrete arch dams by using the atmospheric temperature and reservoir water temperature as the temperature boundary condition. On this basis,a deterministic displacement monitoring model for concrete arch dam is established. The model is successfully applied to the establishment of the monitoring system for the Dongjiang Arch Dam.
引文
[1]吴中如.水工建筑物安全监控理论及其应用[M].北京:高等教育出版社,2003.
[2]高澜.刘家峡主坝位移确定性模型研究[J].大坝与安全,1993,(4):34-38.
[3]李步娟,刘必秀,潘文昌,等.混凝土坝的位移温度计算方法的探讨[J].武汉水利电力大学学报,1993,26(3):317-323.
[4]李端有,周元春,甘孝清.混凝土拱坝多测点确定性位移监控模型研究[J].水利学报,2011,42(8):981-985.
[5] Xu B S,Liu B B,Zheng D J,et al. Analysis method of thermal dam deformation[J]. Science China Technological Sciences,2012,55:1765-1 772.
[6] Tatin M. Thermal displacements of concrete dams:Accounting for water temperature in statistical models[J]. Engineering Structures,2015,91:26-39.
[7]朱伯芳.库水温度的估算[J].水利学报,1985,(2):12-20.
[8]刘光廷,叶源新.溪柄碾压混凝土薄拱坝运行期位移预测和实测[J].水力学发电学报,2002,(1):34-38.
[9]王建,卢兆辉,路振刚.混凝土坝变形初值反演及校准[J].水利学报,2012,43(10):1 223-1 229.
[10]张进平,黎利兵,卢正超.大坝安全监测研究的回顾与展望[J].中国水利水电科学研究院学报,2008,6(4):317-322.
[11]朱伯芳.拱坝温度荷载计算方法的改进[J].水利水电技术,2006,(12):19-22.
[12]李民,李珍照,何金平,等.大坝实测位移模型及建模方法[J].四川大学学报(工程科学版),2003,(3):21-25.
[13]吴中如,沈长松,阮焕祥.论混凝土坝变形统计模型的因子选择[J].河海大学学报,1988,(6):1-9.
[14]钱壬章,俞昌铭,林文贵.传热分析与计算[M].北京:高等教育出版社,1987.
[15]陈才生.数学物理方程[M].北京:科学出版社,1987.
[16]印凡天,夏乐天.概率论与数理统计[M].南京:河海大学出版社,2001.
[2]高澜.刘家峡主坝位移确定性模型研究[J].大坝与安全,1993,(4):34-38.
[3]李步娟,刘必秀,潘文昌,等.混凝土坝的位移温度计算方法的探讨[J].武汉水利电力大学学报,1993,26(3):317-323.
[4]李端有,周元春,甘孝清.混凝土拱坝多测点确定性位移监控模型研究[J].水利学报,2011,42(8):981-985.
[5] Xu B S,Liu B B,Zheng D J,et al. Analysis method of thermal dam deformation[J]. Science China Technological Sciences,2012,55:1765-1 772.
[6] Tatin M. Thermal displacements of concrete dams:Accounting for water temperature in statistical models[J]. Engineering Structures,2015,91:26-39.
[7]朱伯芳.库水温度的估算[J].水利学报,1985,(2):12-20.
[8]刘光廷,叶源新.溪柄碾压混凝土薄拱坝运行期位移预测和实测[J].水力学发电学报,2002,(1):34-38.
[9]王建,卢兆辉,路振刚.混凝土坝变形初值反演及校准[J].水利学报,2012,43(10):1 223-1 229.
[10]张进平,黎利兵,卢正超.大坝安全监测研究的回顾与展望[J].中国水利水电科学研究院学报,2008,6(4):317-322.
[11]朱伯芳.拱坝温度荷载计算方法的改进[J].水利水电技术,2006,(12):19-22.
[12]李民,李珍照,何金平,等.大坝实测位移模型及建模方法[J].四川大学学报(工程科学版),2003,(3):21-25.
[13]吴中如,沈长松,阮焕祥.论混凝土坝变形统计模型的因子选择[J].河海大学学报,1988,(6):1-9.
[14]钱壬章,俞昌铭,林文贵.传热分析与计算[M].北京:高等教育出版社,1987.
[15]陈才生.数学物理方程[M].北京:科学出版社,1987.
[16]印凡天,夏乐天.概率论与数理统计[M].南京:河海大学出版社,2001.