高土石坝地震反应和破坏机理分析
|
摘要
应用动力弹塑性分析方法对高土石坝的地震反应特性和破坏机理进行了系统研究。通过研究地震动作用下坝体的剪应变、永久位移以及网格变形的变化规律,并与振动台模型试验的结果进行对比,说明了坝体上部1/5范围内变形较大,竖向地震动对坝坡稳定性影响明显,验证了FLAC程序模拟高土石坝地震反应的合理性;同时分析了坝高、坝坡和地震动峰值参数变化对大坝破坏形态的影响,研究结果为大坝的设计、安全评价和抗震措施研究提供理论基础。
The main purpose is to study the seismic response and failure mechanism of high earth-rockfill dams under earthquakes by using dynamic elasto-plastic methods.The main concerned aspects are the shear strain,the permanent deformation as well as the grid deformation during earthquakes considering the seismic wave input of one-direction and two-direction.The results show that larger deformation occurs in the upper scope(1 / 5) of the dam,and the vertical seismic input has obvious impact on the slope stability.The results of the shaking table tests verify the reasonableness of FLAC procedures in simulating the seismic response of high earth-rockfill dams.At the same time,the influences of parameter changes of dam height,slope and ground motion on failure modes of dams are systematically studied.The results are valuable for the design of projects,the standard of safety assessment and the choice of the anti-seismic measures.
The main purpose is to study the seismic response and failure mechanism of high earth-rockfill dams under earthquakes by using dynamic elasto-plastic methods.The main concerned aspects are the shear strain,the permanent deformation as well as the grid deformation during earthquakes considering the seismic wave input of one-direction and two-direction.The results show that larger deformation occurs in the upper scope(1 / 5) of the dam,and the vertical seismic input has obvious impact on the slope stability.The results of the shaking table tests verify the reasonableness of FLAC procedures in simulating the seismic response of high earth-rockfill dams.At the same time,the influences of parameter changes of dam height,slope and ground motion on failure modes of dams are systematically studied.The results are valuable for the design of projects,the standard of safety assessment and the choice of the anti-seismic measures.
引文
[1]赵剑明,汪闻韶.关于水利工程震害及抗震研究的几点思考[J].清华大学学报(自然科学版),2000,40(增刊1):91–95.(ZHAO Jian-mimg,WANG Wen-shao.Some reflections on earthquake disaster and earthquake resisitance study of hydraulic projects[J].Journal of Tsinghua University(Natural Science),2000,40(S1):91–95.(in Chinese))
[2]赵剑明,常亚屏,陈宁.加强高土石坝抗震研究的现实意义及工作展望[J].世界地震工程,2004(1):95–99.(ZHAO Jian-ming,CHANG Ya-ping,CHEN Ning.Significance and prospects about earthquake resistant studies of high earth-rockfill dams[J].Journal of World Earthquake Engineering,2004(1):95–99.(in Chinese))
[3]顾淦臣.土石坝地震工程[M].南京:河海大学出版社,1989.(GUO Gan-cheng.Earth dam earthquake engineering[M].Nanjing:Hohai University Press,1989.(in Chinese))
[4]陈慧远,等.最新土石坝工程学[M].北京:水利电力出版社,1983.(Chen Hui-yuan,et al.New dam engineering[M].Beijing:China Water Power Press,1983.(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 Conservancy and Hydropower Pres,2009.(in Chinese))
[7]Itasca Consulting Group,Inc.FLAC-2D(Fast Lagrangian Analysis of Continua in 2 Dimensions)Version 4.0,User manual[S].2002.
[8]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))
[9]刘莹光.加筋技术在高土石坝中的应用[D].大连:大连理工大学,2006.(LIU Ying-guang.Application of reinforcement technology to high earth-rockfill dam earthquake-resistance[D].Dalian:Dalian University of Technology,2006.(in Chinese))
[10]孔宪京,邹德高,邓学晶,等.高土石坝综合抗震措施及其效果的验算[J].水利学报,2006,37(12):1489–1495.(KONG Xian-jing,ZOU De-gao,DENG Xuejing,et al.Comprehensive earthquake resistant measure of high earth-rockfill dams and effectiveness verification[J].Journal of Hydraulic Engineering,2006,37(12):1489–1495.(in Chinese))
[11]韩国城,孔宪京,等.面板堆石坝永久变形、面板应力及抗震措施研究[R].大连:大连理工大学工程抗震研究所,1995.(HAN Guo-cheng,KONG Xian-jing,et al.Study on the permanent deformation,the panel stress and the antic-seismic measures of concrete-faced rockfill dam[R].Dalian:The Earthquake Engineering Institute,Dalian University of Technology,1995.(in Chinese))
[12]孔宪京,韩国城,等.地震时土石填筑坝破坏机理及抗震对策研究[R].大连:大连理工大学工程抗震研究所,1997.(KONG Xian-jing,HAN Guo-cheng,et al.Study on damage mechanism and antic-seismic of the earth-rockfill dam under earthquake[R].Dalian:The Earthquake Engineering Institute,Dalian University of Technology,1997.(in Chinese))
[13]韩国城,孔宪京.混凝土面板堆石坝抗震研究进展[J].大连理工大学学报(自然科学版),1996,36(6):708–720.(HAN Guo-cheng,KONG Xian-jing.A seismatic studies of concrete faced rockfill dams:state-of-the-art[J].Journal of Dalian University of Technology(Natural Science),1996,36(6):708–720.(in Chinese))
[14]李永胜.边坡振动台模型试验及相关问题研究[D].大连:大连理工大学,2009.(LI Yong-sheng.Shaking table test on the model of slope and research on correlated issues[D].Dalian:Dalian University of Technology,2009.(in Chinese))
[2]赵剑明,常亚屏,陈宁.加强高土石坝抗震研究的现实意义及工作展望[J].世界地震工程,2004(1):95–99.(ZHAO Jian-ming,CHANG Ya-ping,CHEN Ning.Significance and prospects about earthquake resistant studies of high earth-rockfill dams[J].Journal of World Earthquake Engineering,2004(1):95–99.(in Chinese))
[3]顾淦臣.土石坝地震工程[M].南京:河海大学出版社,1989.(GUO Gan-cheng.Earth dam earthquake engineering[M].Nanjing:Hohai University Press,1989.(in Chinese))
[4]陈慧远,等.最新土石坝工程学[M].北京:水利电力出版社,1983.(Chen Hui-yuan,et al.New dam engineering[M].Beijing:China Water Power Press,1983.(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 Conservancy and Hydropower Pres,2009.(in Chinese))
[7]Itasca Consulting Group,Inc.FLAC-2D(Fast Lagrangian Analysis of Continua in 2 Dimensions)Version 4.0,User manual[S].2002.
[8]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))
[9]刘莹光.加筋技术在高土石坝中的应用[D].大连:大连理工大学,2006.(LIU Ying-guang.Application of reinforcement technology to high earth-rockfill dam earthquake-resistance[D].Dalian:Dalian University of Technology,2006.(in Chinese))
[10]孔宪京,邹德高,邓学晶,等.高土石坝综合抗震措施及其效果的验算[J].水利学报,2006,37(12):1489–1495.(KONG Xian-jing,ZOU De-gao,DENG Xuejing,et al.Comprehensive earthquake resistant measure of high earth-rockfill dams and effectiveness verification[J].Journal of Hydraulic Engineering,2006,37(12):1489–1495.(in Chinese))
[11]韩国城,孔宪京,等.面板堆石坝永久变形、面板应力及抗震措施研究[R].大连:大连理工大学工程抗震研究所,1995.(HAN Guo-cheng,KONG Xian-jing,et al.Study on the permanent deformation,the panel stress and the antic-seismic measures of concrete-faced rockfill dam[R].Dalian:The Earthquake Engineering Institute,Dalian University of Technology,1995.(in Chinese))
[12]孔宪京,韩国城,等.地震时土石填筑坝破坏机理及抗震对策研究[R].大连:大连理工大学工程抗震研究所,1997.(KONG Xian-jing,HAN Guo-cheng,et al.Study on damage mechanism and antic-seismic of the earth-rockfill dam under earthquake[R].Dalian:The Earthquake Engineering Institute,Dalian University of Technology,1997.(in Chinese))
[13]韩国城,孔宪京.混凝土面板堆石坝抗震研究进展[J].大连理工大学学报(自然科学版),1996,36(6):708–720.(HAN Guo-cheng,KONG Xian-jing.A seismatic studies of concrete faced rockfill dams:state-of-the-art[J].Journal of Dalian University of Technology(Natural Science),1996,36(6):708–720.(in Chinese))
[14]李永胜.边坡振动台模型试验及相关问题研究[D].大连:大连理工大学,2009.(LI Yong-sheng.Shaking table test on the model of slope and research on correlated issues[D].Dalian:Dalian University of Technology,2009.(in Chinese))
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心