拱坝非线性地震反应分析
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摘要
以乌东德拱坝为对象,进行了拱坝非线性地震反应分析。结果表明:坝体损伤区域明显大于坝体混凝土按线弹性材料计算时最大主应力超过抗拉强度的区域,说明传统方法低估了拱坝的开裂范围,偏于危险;考虑基岩的非线性后,坝体损伤总体上要有所减小;坝基岩体剪胀角对坝基岩体的屈服和坝体混凝土的损伤都有影响,但是规律不明确,因此应该进行基岩剪胀角的敏感性分析。
The nonlinear seismic response analysis of Wudongde arch dam is reported in the paper.Results show that the simulated dam damage area is significantly greater than the area where the dam maximum principal stress exceeds the dam tensile strength by treating the arch dam as the traditional linear elastic material model.Therefore,the traditional method underestimates the arch dam cracking area and its danger.The dam overall damage is reduced after considering the nonlinear of bedrock.The dam foundation rock's dilatancy angle has effect on the yield of the dam foundation rock and the damage to the dam concrete.However,the changing law is not clear,therefore,the sensitivity analysis of the bedrock's dilatancy angle should be conducted.
The nonlinear seismic response analysis of Wudongde arch dam is reported in the paper.Results show that the simulated dam damage area is significantly greater than the area where the dam maximum principal stress exceeds the dam tensile strength by treating the arch dam as the traditional linear elastic material model.Therefore,the traditional method underestimates the arch dam cracking area and its danger.The dam overall damage is reduced after considering the nonlinear of bedrock.The dam foundation rock's dilatancy angle has effect on the yield of the dam foundation rock and the damage to the dam concrete.However,the changing law is not clear,therefore,the sensitivity analysis of the bedrock's dilatancy angle should be conducted.
引文
[1]涂劲.有缝界面的混凝土高坝-地基系统的非线性地震波动反应分析[D].北京:中国水利水电科学研究院,1999.TU Jin.Nonlinear seismic response analysis of high concrete dam-foundation systems with joint surface[D].Beijing:China Institute of Water Re-sources and Hydropower Research,1999.(in Chinese)
[2]张伯艳.高拱坝坝肩抗震稳定研究[D].西安:西安理工大学,2005.ZHANG Boyan.High arch dam abutment aseismatic stability study[D].Xi’an:Xi’an University of Technology,2005.(in Chinese)
[3]PAN Jianwen,ZHANG Chuhan,WANG Jinting,et al.Seismic damage-cracking analysis of arch dams using different earthquake input mecha-nisms[J].Science in China Series E:Technological Sciences,2009,52(2):518-529.
[4]侯顺载.拱坝静动力有限元程序ADAP-CH89[M].北京:中国水利水电科学研究院,1989.
[5]何建涛.地震作用下大坝-地基体系的损伤破坏研究[D].北京:中国水利水电科学研究院,2010.HE Jiantao.Study on the damage and failure of dam-foundation system under earthquake action[D].Beijing:China Institute of Water Resourcesand Hydropower Research,2010.(in Chinese)
[6]雷拓,钱江,刘成清.混凝土损伤塑性模型应用研究[J].结构工程师,2008,24(2):22-27.LEI Tuo,QIAN Jiang,LIU Chengqing.Application of damaged plasticity model for concrete[J].Structure Engineers,2008,24(2):22-27.(in Chinese)
[7]陆新征,叶列平,缪志伟.建筑抗震弹塑性分析—原理、模型与在ABAQUS、MSC.MARC和SAP2000上的实践[M].北京:中国建筑工业出版社,2009:126.LU Xinzheng,YE Lieping,LIAO Zhiwei.Elasto-plastic analysis of buildings against earthquake—theory,model and implementation on ABAQUS,MSC.MARC and SAP2000[M].Beijing:China Architecture&Building Press,2009:126.(in Chinese)
[8]高泉,赵国藩,赵顺波.龄期及粗骨料级配对高坝混凝土断裂能和断裂韧度的影响规律[J].建筑科学,1994,(3):19-23.GAO Quan,ZHAO Guofan,ZHAO Shunbo.The effect of age of loading and aggregate gradation on the fracture energy and fracture toughness ofhigh dam concrete[J].Building Science,1994,(3):19-23.(in Chinese)
[9]赵国藩,徐世烺,王凤翼.大骨料全级配混凝土断裂韧度和断裂能研究[J].工程力学(增刊),1996:51-62.
[10]邓宗才,李庆斌,傅华.人工骨料全级配大坝混凝土的拉压力学性能[J].水利学报,2005,36(2):214-218.DENG Zongcai,LI Qingbin,FU Hua.Tensile and compressive behaviors of full grade concrete made of crushed coarse aggregate[J].Journal ofHudraulic Engineering,2005,36(2):214-218.(in Chinese)
[2]张伯艳.高拱坝坝肩抗震稳定研究[D].西安:西安理工大学,2005.ZHANG Boyan.High arch dam abutment aseismatic stability study[D].Xi’an:Xi’an University of Technology,2005.(in Chinese)
[3]PAN Jianwen,ZHANG Chuhan,WANG Jinting,et al.Seismic damage-cracking analysis of arch dams using different earthquake input mecha-nisms[J].Science in China Series E:Technological Sciences,2009,52(2):518-529.
[4]侯顺载.拱坝静动力有限元程序ADAP-CH89[M].北京:中国水利水电科学研究院,1989.
[5]何建涛.地震作用下大坝-地基体系的损伤破坏研究[D].北京:中国水利水电科学研究院,2010.HE Jiantao.Study on the damage and failure of dam-foundation system under earthquake action[D].Beijing:China Institute of Water Resourcesand Hydropower Research,2010.(in Chinese)
[6]雷拓,钱江,刘成清.混凝土损伤塑性模型应用研究[J].结构工程师,2008,24(2):22-27.LEI Tuo,QIAN Jiang,LIU Chengqing.Application of damaged plasticity model for concrete[J].Structure Engineers,2008,24(2):22-27.(in Chinese)
[7]陆新征,叶列平,缪志伟.建筑抗震弹塑性分析—原理、模型与在ABAQUS、MSC.MARC和SAP2000上的实践[M].北京:中国建筑工业出版社,2009:126.LU Xinzheng,YE Lieping,LIAO Zhiwei.Elasto-plastic analysis of buildings against earthquake—theory,model and implementation on ABAQUS,MSC.MARC and SAP2000[M].Beijing:China Architecture&Building Press,2009:126.(in Chinese)
[8]高泉,赵国藩,赵顺波.龄期及粗骨料级配对高坝混凝土断裂能和断裂韧度的影响规律[J].建筑科学,1994,(3):19-23.GAO Quan,ZHAO Guofan,ZHAO Shunbo.The effect of age of loading and aggregate gradation on the fracture energy and fracture toughness ofhigh dam concrete[J].Building Science,1994,(3):19-23.(in Chinese)
[9]赵国藩,徐世烺,王凤翼.大骨料全级配混凝土断裂韧度和断裂能研究[J].工程力学(增刊),1996:51-62.
[10]邓宗才,李庆斌,傅华.人工骨料全级配大坝混凝土的拉压力学性能[J].水利学报,2005,36(2):214-218.DENG Zongcai,LI Qingbin,FU Hua.Tensile and compressive behaviors of full grade concrete made of crushed coarse aggregate[J].Journal ofHudraulic Engineering,2005,36(2):214-218.(in Chinese)
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