Dynamic response and reinforcement ultimate aseismic capacity of high core rockfill dams
ZHU Ya-lin1, 2, KONG Xian-jing3, ZHU Da-yong1, 2, GAN Wen-ning1
1. School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China; 2. Anhui Key Laboratory of Civil Engineering Structures and Materials, Hefei 230009, China; 3. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
Abstract：Based on the dynamic response and permanent deformation of high core rockfill dams, the seismic reinforcement measures and efficiencies are studied. The ultimate aseismic capacity of a reinforced dam is evaluated. The results show that the elasto-plastic dynamic method is feasible for the analysis of high core rockfill dams. The greater the seismic intensity, the greater the dynamic shear stresses and dynamic shear strain within the dam, the greater the dynamic response and the permanent deformation of the dam. The settlement is larger than the horizontal displacement under earthquakes. The main form of earthquake deformation is settlement. The large deformation zone is the upper scope (1/5) of the dam and valleys corresponding to the top of the dam site. The vertical displacement is significantly lower by using the reinforcement measures. From the preliminary evaluation of stability and deformation the reinforcement ultimate aseismic capacity of the dam is improved 0.05gthan that of the original dam.
[1] 赵剑明, 刘小生, 陈 宁, 等. 高心墙堆石坝的极限抗震能力研究[J]. 水力发电学报, 2009, 28(5): 97-102. (ZHAO Jian-ming, LIU Xiao-sheng, CHEN Ning, et al. Research on the maximum anti-seismic capability of high earth core rock-fill dam[J]. Journal of Hydroelectric Engineering, 2009, 28(5): 97-102. (in Chinese)) [2] 赵剑明, 温彦峰, 刘小生, 等. 深厚覆盖层上高土石坝的极限抗震能力分析[J]. 岩土力学, 2010(增刊1): 41-47. (ZHAO Jian-ming, WEN Yan-feng, LIU Xiao-sheng, et al. Study of maximum aseismic capability of high earth-rock dam on deep riverbed alluviums[J]. Rock and Soil Mechanics, 2010, 31(S1): 41-47. (in Chinese)) [3] 邵 磊, 迟世春, 李红军, 等. 高心墙堆石坝极限抗震能力初探[J]. 岩土力学, 2011, 32(12): 3827-3833. (SHAO Lei, CHI Shi-chun, LI Hong-jun, et al. Preliminary studies of ultimate aseismic capacity of high core rockfill dam[J]. Rock and Soil Mechanics, 2011, 32(12): 3827-3833. (in Chinese)) [4] 李国英, 沈 婷, 赵魁芝. 高心墙堆石坝地震动力特性及抗震极限分析[J]. 水利水运工程学报, 2010(3): 1-8. (LI Guo-ying, SHEN Ting, ZHAO Kui-zhi. Seismic dynamic behavior and limitaseismic analysis on high earth core rockfill dams[J]. Hydro-science and Engineering, 2010(1): 1-8. (in Chinese)) [5] 彭文斌. FLAC3D实用教程[M]. 北京: 机械工业出版社, 2008. (PENG Wen-bin. FLAC3D practical guide[M]. Beijing: Mechanical Industry Press, 2008. (in Chinese)) [6] 陈育民, 徐鼎平. FLAC/FLAC3D基础与工程实例[M].北京:中国水利水电出版社, 2009. (CHEN Yu-ming, XU Ding-ping. Foundation and examples of FLAC/FLAC3D[M]. Beijing: China Water Power Press, 2009. (in Chinese)) [7] 黄润秋, 许 强. 显示拉格朗日差分分析在岩石边坡工程中的应用[J]. 岩石力学与工程学报1995, 14(4): 346-354. (HUANG Run-qiu, XU Qiang. Application of explicit lagrangian finite-difference method in rock slope engineering[J]. Chinese Journal of Rock Mechanics and Engineering, 1995, 14(4): 346-354. (in Chinese)) [8] 孔宪京, 邹德高, 徐 斌, 等. 两河口水电站可行性研究报告[R]. 大连: 大连理工大学工程抗震研究所, 2009. (KONG Xian-jing, ZOU De-gao, XU Bin, et al. Study report of lianghekou hydropower feasibility[R]. Dalian: Institute of Earthquake Engineering Dalian University of Technology, 2009. (in Chinese)) [9] 河海大学岩土工程科学研究所. 两河口土石坝工程筑坝料动力特性试验研究报告[R]. 南京: 河海大学岩土工程科学研究所, 2008. (Institute of Geotechnical Engineering, Hohai University. Report of Lianghekou dam project dam material dynamic characteristics test[R]. Institute of Geotechnical Engineering, Hohai University, 2008. (in Chinese)) [10] 朱亚林. 地震时高土石坝的弹塑性分析和抗震措施研究[D]. 大连: 大连理工大学, 2011. (ZHU Ya-lin. Study on elasto-plastic method and aseismic measures of high earth-rockfill dam during earthquake[D]. Dalian: Dalian University of Technology, 2011. (in Chinese))
