基于动力有限元法对拱坝应力控制指标的分析
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摘要
我国已建或拟建的高拱坝许多位于强震区,使得拱坝抗震分析中应力控制指标的制定成为十分重要的课题。本文探讨现有规范在动力方面的不足,并根据混凝土拱坝规范,利用静力作用下有限元等效应力控制指标的制定与拱梁分载法控制指标之间的关系,提出静动综合作用下有限元等效应力的控制指标。以大丫口拱坝实际工程为例,运用振型分解反应谱法计算了各种工况下坝体的地震静动综合响应,并运用本文提出的静动综合作用下等效应力控制指标进行校核,结果显示此标准具备较好的合理性及可行性。
Many of the high arch dams constructed or to be constructed in China are located in the meizoseismal areas.Stress control standard for analysis of the earthquake-resisting safety of arch dams becomes important.This article discusses the shortage of seismic load calculation given by the existing design specifications,and through establishing a relationship of the control standard of the FEM static equivalent stress versus that of the trial-load method,puts forth a control standard of FEM equivalent stress under the combined action of static and dynamic loads.As a case study,the earthquake response of the Dayakou arch dam under various work conditions are analyzed by the response spectrum method of modal decomposition,and it is compared with the proposed standard.The results demonstrate that the proposed standard is reasonable and feasible.
Many of the high arch dams constructed or to be constructed in China are located in the meizoseismal areas.Stress control standard for analysis of the earthquake-resisting safety of arch dams becomes important.This article discusses the shortage of seismic load calculation given by the existing design specifications,and through establishing a relationship of the control standard of the FEM static equivalent stress versus that of the trial-load method,puts forth a control standard of FEM equivalent stress under the combined action of static and dynamic loads.As a case study,the earthquake response of the Dayakou arch dam under various work conditions are analyzed by the response spectrum method of modal decomposition,and it is compared with the proposed standard.The results demonstrate that the proposed standard is reasonable and feasible.
引文
[1]中华人民共和国水利行业标准.《SL282-2003混凝土拱坝设计规范》[S].北京:中国水利水电出版社,2003.Water industry standard of the People’s Republic of China.《SL282-2003 Design specification for concrete arch dams》[S].Beijing:China Waterpower Press,2003.(in Chinese).
[2]中华人民共和国电力行业标准.《DL5346-2006混凝土拱坝设计规范》[S].北京:中国电力出版社,2006.Power industry standard of the People’s Republic of China.《DL5346-2006 Design specification for concrete arch dams》[S].Beijing:China Electric Power Press,2006.(in Chinese)
[3]中华人民共和国电力行业标准,水工建筑物抗震设计规范(DL5073-2003)[S].北京:中国电力出版社,2003.Power industry standard of the People’s Republic of China.《DL5073-2003 Specifications for seismic design of hydraulicstructures》[S].Beijing:China Electric Power Press,2003.(in Chinese)
[4]余开强.小湾水电站拱坝坝体三维有限元动力分析[D].四川大学,2003.YU Kaiqiang.The 3D finite element dynamic analysis for Xiaowan arch dam[D].Sichuan University,2003.(in Chinese)
[5]祁建华,曹增延,等.二滩拱坝地震响应的动力模型试验研究[J].水电站设计,1993,9(1):64～67.QI Jianhua,CAO Zengyan.The study of seismic response to the dynamic model for Ertan arch dam[J].Hydropower StationDesign,1993,9(1):64～67.(in Chinese)
[6]许国安.二滩水电站拱坝地基三维渗流分析及渗控措施的研究[J].水力发电,1990,3.XU Guo-an.The study of 3D seepage analysis and control measures for the foundation of Ertan arch dam[J].Journal ofHydroelectric Engineering,1990,3.(in Chinese)
[7]田景元,张志伟.大岗山面板堆石坝加速度放大系数对材料动参数和输入地震动的敏感性分析[J].水电站设计,2006,22(4):19～22.TIAN Jingyuan,ZHANG Zhiwei.The sensitivity analysis of the influence of the acceleration amplification factor to dynamicparameters of materials and input ground motion for Dagangshan rockfill dam[J].Hydroelectric Power Station Design,2006,22(4):19～22.(in Chinese)
[8]陈丽萍,尤林.溪洛渡混凝土双曲拱坝的体型设计[J].水电站设计,2006,22(2):18～20.CHEN Linping,YOU Lin.The body design for Xiluodu concrete double arch dam[J].Hydroelectric Power Station Design,2006,22(2):18～20.(in Chinese)
[9]刘新佳,龙渝川,等.地基辐射阻尼和库水对拱坝非线性地震响应的影响[J].水力发电,2003,11:31～33.LIU Xinjia,LONG Yuchuan,et al.The influence of foundation radiation damping and reservoir on the nonlinear seismic response toarch dam[J].Journal of Hydroelectric Engineering,2003,11;31～33.(in Chinese)
[10]常晓林,游锋,等.紧水滩拱坝裂缝稳定性分析[J].武汉大学学报,2008,41(5):26～30.CHANG Xiaolin,YOU Feng,et al.The analysis of crack stability for Jinshuitan arch dam[J].Journal of Wuhan University,2008,41(5):26～30.(in Chinese)
[11]朱伯芳,高季章,陈祖煜,厉易生.拱坝设计与研究[M].北京:中国水利水电出版社,2002.ZHU Bofang,GAO Jizhang,CHEN Zuyu,LI Yisheng.Design and study of arch dam[M].Beijing:Hydroelectric Press of China,2002.(in Chinese)
[12]四川省大渡河大岗山水电站可行性研究报告[R].中国水电顾问集团成都勘测设计研究院,中国水利水电科学研究院,2005,5.Sichuan Dadu River Dagangshan hydropower station feasibility study report[R].Hydrochina Chengdu Engineering Corporation,China Institute of Water Resources and Hydropower Research,2005,5.(in Chinese)
[13]二滩水电站工程总结[M].中国水利水电出版社,2005.Summary of Ertan hydropower station project[M].China Waterpower Press,2005.(in Chinese)
[2]中华人民共和国电力行业标准.《DL5346-2006混凝土拱坝设计规范》[S].北京:中国电力出版社,2006.Power industry standard of the People’s Republic of China.《DL5346-2006 Design specification for concrete arch dams》[S].Beijing:China Electric Power Press,2006.(in Chinese)
[3]中华人民共和国电力行业标准,水工建筑物抗震设计规范(DL5073-2003)[S].北京:中国电力出版社,2003.Power industry standard of the People’s Republic of China.《DL5073-2003 Specifications for seismic design of hydraulicstructures》[S].Beijing:China Electric Power Press,2003.(in Chinese)
[4]余开强.小湾水电站拱坝坝体三维有限元动力分析[D].四川大学,2003.YU Kaiqiang.The 3D finite element dynamic analysis for Xiaowan arch dam[D].Sichuan University,2003.(in Chinese)
[5]祁建华,曹增延,等.二滩拱坝地震响应的动力模型试验研究[J].水电站设计,1993,9(1):64～67.QI Jianhua,CAO Zengyan.The study of seismic response to the dynamic model for Ertan arch dam[J].Hydropower StationDesign,1993,9(1):64～67.(in Chinese)
[6]许国安.二滩水电站拱坝地基三维渗流分析及渗控措施的研究[J].水力发电,1990,3.XU Guo-an.The study of 3D seepage analysis and control measures for the foundation of Ertan arch dam[J].Journal ofHydroelectric Engineering,1990,3.(in Chinese)
[7]田景元,张志伟.大岗山面板堆石坝加速度放大系数对材料动参数和输入地震动的敏感性分析[J].水电站设计,2006,22(4):19～22.TIAN Jingyuan,ZHANG Zhiwei.The sensitivity analysis of the influence of the acceleration amplification factor to dynamicparameters of materials and input ground motion for Dagangshan rockfill dam[J].Hydroelectric Power Station Design,2006,22(4):19～22.(in Chinese)
[8]陈丽萍,尤林.溪洛渡混凝土双曲拱坝的体型设计[J].水电站设计,2006,22(2):18～20.CHEN Linping,YOU Lin.The body design for Xiluodu concrete double arch dam[J].Hydroelectric Power Station Design,2006,22(2):18～20.(in Chinese)
[9]刘新佳,龙渝川,等.地基辐射阻尼和库水对拱坝非线性地震响应的影响[J].水力发电,2003,11:31～33.LIU Xinjia,LONG Yuchuan,et al.The influence of foundation radiation damping and reservoir on the nonlinear seismic response toarch dam[J].Journal of Hydroelectric Engineering,2003,11;31～33.(in Chinese)
[10]常晓林,游锋,等.紧水滩拱坝裂缝稳定性分析[J].武汉大学学报,2008,41(5):26～30.CHANG Xiaolin,YOU Feng,et al.The analysis of crack stability for Jinshuitan arch dam[J].Journal of Wuhan University,2008,41(5):26～30.(in Chinese)
[11]朱伯芳,高季章,陈祖煜,厉易生.拱坝设计与研究[M].北京:中国水利水电出版社,2002.ZHU Bofang,GAO Jizhang,CHEN Zuyu,LI Yisheng.Design and study of arch dam[M].Beijing:Hydroelectric Press of China,2002.(in Chinese)
[12]四川省大渡河大岗山水电站可行性研究报告[R].中国水电顾问集团成都勘测设计研究院,中国水利水电科学研究院,2005,5.Sichuan Dadu River Dagangshan hydropower station feasibility study report[R].Hydrochina Chengdu Engineering Corporation,China Institute of Water Resources and Hydropower Research,2005,5.(in Chinese)
[13]二滩水电站工程总结[M].中国水利水电出版社,2005.Summary of Ertan hydropower station project[M].China Waterpower Press,2005.(in Chinese)
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