A reasonable determination of deformation modulus and Poisson ratio of arch dam foundation rock is very necessary for arch-cantilever method in arch stress analysis. Dam foundation is composed of different lithology rock masses, which shows significant mechanical anisotropy, inhomogeneity and discontinuity. Any rock deformation parameter to replace the whole deformation parameters or a simple averaging of all deformation parameters is unreasonable. In the present paper we present a 3-D finite element method for predicting the synthetic deformation modulus and synthetic Poisson ratio of arch dam foundation based on the least squares method. By comparing with theoretical solution, we found this approach is feasible for predicting the synthetic deformation modulus and synthetic Poisson ratio of complex foundation composed of different lithology rock masses, faults and weak interlayers. As an application of this approach, the synthetic deformation modulus and synthetic Poisson ratio of Jinping arch dam foundation are calculated. Results demonstrate that the deformation modulus calculated by this method is reasonable on the premise of considering geological structures and foundation treatments.
ZHANG Ping
,
LIU De-fu
,
ZHANG Bo
,
ZHANG Li-jun
. Finite Element Method for Predicting Synthetic Deformation
Modulus and Poisson Ratio of Arch Dam Foundation[J]. Journal of Changjiang River Scientific Research Institute, 2014
, 31(12)
: 65
-68
.
DOI: 10.3969/j.issn.1001-5485.2014.12.013
[1] 朱伯芳,高季章,陈祖煜,等.拱坝设计与研究[M].北京:中国水利水电出版社,2002. (ZHU Bo-fang, GAO Ji-zhang, CHEN Zu-yu, et al. Design and Research for Concrete Arch Dams[M]. Beijing: China Water Power Press, 2002. (in Chinese))
[2] 林绍忠,苏海东.复杂岩基上的拱坝多拱多梁法应力分析[J].长江科学院院报,2002,19(5):27-30. (LIN Shao-zhong, SU Hai-dong. Stress Analysis for Arch Dams on Complicated Rock Foundation Using Trial Load Method[J]. Journal of Yangtze River Scientific Research Institute, 2002,19(5):27-30. (in Chinese))
[3] 周 涛.溪洛渡水电站拱坝基础综合变模分析[J].四川水力发电,2001,20(2): 89-93. (ZHOU Tao. Study on Overall Deformation Modulus for Arch Dam Foundation at Xiluodu Hydropower Station[J]. Sichuan Water Power, 2001,20(2): 89-93.(in Chinese))
[4] 杜善义,王 彪.复合材料细观力学[M].北京:科学出版社,1998. (DU Shan-yi, WANG Biao. Composite Micromechanics[M]. Beijing: Science Press, 1998. (in Chinese))
[5] 陈作荣,诸德超,陆 萌.复合材料的等效弹性性能[J].复合材料学报, 2000, 17(3):73-77. (CHEN Zuo-rong, ZHU De-chao, LU Meng. Effective Elastic Properties of Composites[J]. Acta Materiae Compositae Sinica, 2000, 17(3):73-77. (in Chinese))
[6] 彭 辉,刘德富,陈和春.锦屏拱坝基础变形模量多目标非线性规划研究[J].中国农村水利水电,2005,(11),62-65. (PENG Hui, LIU De-fu, CHEN He-chun. Study on the Multi-objective Non-linear Programming of Foundation Deformation Modulus of Jinping Arch Dam[J]. China Rural Water and Hydropower, 2005,(11): 62-65. (in Chinese))
