水库围堤地基液化有效应力动力分析
|
摘要
利用基于Biot方程耦合场分割算法的ANSYS有限元软件二次开发形成的岩土工程有效应力分析模块,对某水库围堤坝基进行了液化震陷分析。计算中选取具有代表性的堤坝断面建立二维有限元模型,并采用上海50a超越概率10%的人造地震波加速度-时程作为基底输入地震。计算得到围堤孔隙水压力与有效应力比的分布情况以及震陷分布情况。分析结果表明,坝基中心部位的孔隙水压力比要比坝脚两侧的孔隙水压力比小,坝基中心部位可以不进行地基处理。该方法可为今后其他类似工程的设计和施工提供参考。
Using an effective stress dynamic analysis module which is compiled from secondary development of ANSYS on the basis of partitioned solution procedures of Biot equation coupled mechanical systems,analysis on liquefaction shock settlement of the embankment foundation of a reservoir is performed.In the calculation,two-dimensional finite element model of representative embankment section is set up;and input ground motion is artificially composed seismic accelerations with a 10% transcendental probability for 50 years in Shanghai.Distribution of ratios of pore water pressure and effective stress of embankment foundation of reservoir and distribution of seismic subsidence of the embankment are obtained by calculation.As demonstrated by the analysis,ratio of pore water pressure of central part of the embankment foundation is smaller than that of both sides of the embankment foundation;and foundation treatment is not necessary for the central part of the embankment foundation.The method can provide references for design and construction of other similar projects.
Using an effective stress dynamic analysis module which is compiled from secondary development of ANSYS on the basis of partitioned solution procedures of Biot equation coupled mechanical systems,analysis on liquefaction shock settlement of the embankment foundation of a reservoir is performed.In the calculation,two-dimensional finite element model of representative embankment section is set up;and input ground motion is artificially composed seismic accelerations with a 10% transcendental probability for 50 years in Shanghai.Distribution of ratios of pore water pressure and effective stress of embankment foundation of reservoir and distribution of seismic subsidence of the embankment are obtained by calculation.As demonstrated by the analysis,ratio of pore water pressure of central part of the embankment foundation is smaller than that of both sides of the embankment foundation;and foundation treatment is not necessary for the central part of the embankment foundation.The method can provide references for design and construction of other similar projects.
引文
[1]李再光,罗晓辉.尾矿坝地震反应的拟静力稳定分析[J].岩土力学,2006,27(7):1138-1142.LI Zai-guang,LUO Xiao-hui.Equivalent static stability analysis of earthquake response of tailings dam[J].Rock and Soil Mechanics,2006,27(7):1138-1142.
[2]戴跃华,薛继乐.ANSYS在土石坝有限元计算中的应用[J].水利与建筑工程学报,2007,5(4):74-76.DAI Yue-hua,XUE Ji-le.Application of ANSYS in finite element anslysis of earth-rockfill dam[J].Journal of Water Resources and Architectural Engineering,2007,5(4):74-76.
[3]周健,孔戈,张冬茵.ANSYS在云龙水库心墙堆石坝三维地震反应分析中的应用[J].岩土力学,2006,27(12):2133-2136.ZHOU Jian,KONG Ge,ZHANG Dong-yin.Application of ANSYS to three-dimensional seismic response analysis of Yunlong reservoir earth core rockfill dam[J].Rock and Soil Mechanics,2006,27(12):2133-2136.
[4]SIYAHI BILGE,ARSLAN HAYDAR.Nonlinear dynamic finite element simulation of Alibey earth dam[J].Environmental Geology,2008,54(1):77-85
[5]朱百里,沈珠江.计算土力学[M].上海:上海科学技术出版社,1990:134-138.
[6]周健,董鹏,戚佩江.灰渣坝抗震稳定性的三维有效应力动力分析[J].水利学报,2000,(7):44-48.ZHOU Jian,DONG Peng,QI Pei-jiang.3-D dynamic effective stress analysis on the aseismic stability of flyash dam[J].Journal of Hydraulic Engineering,2000,(7):44-48.
[7]HUANG MAOSONG,WU SHIMING,ZIENKIEWICZ O C.Incompressible or nearly incompressible soil dynamic behaviour—A new staggered algorithm to circumvent restrictions of mixed formulation[J].Soil Dynamics and Earthquake Engineering,2001,21:169-179.
[8]JEAN H PREVOST.Partitioned solution procedure for simultaneous integration of coupled-field problems[J].Communications in Numerical Methods in Engineering,1997,13:239-247.
[9]周健,孔戈,张刚,等.基于耦合场分割算法的ANSYS二次开发及其应用[J].地震工程与工程振动,2006,26(2):73-79.ZHOU Jian,KONG Ge,ZHANG Gang,et al.ANSYS redevelopment and its application based on partitioned solution procedures of coupled mechanical systems[J].Earthquake Engineering and Engineering Vibration,2006,26(2):73-79.
[10]谢康和,周健.岩土工程有限元分析理论与应用[M].北京:科学出版社,2002.
[11]徐志英,沈珠江.地震液化的有效应力二维动力分析方法[J].华东水利学院学报,1981,(3):1-14.XU Zhi-ying,SHEN Zhu-jiang.2-D Dynamic analysis of effective stresses of seismic liquefaction[J].Journal of East China College of Hydraulic Engineering,1981,(3):1-14.
[12]王玲玲,何蕴龙.堆石坝地震反应分析[J].人民长江,2003,34(6):20-22.WANG Ling-ling,HE Yun-long.Analysis efects of earthquakes on rockfill dam[J].Yangtze River,2003,34(6):20-22.
[13]国家质量技术监督局.GB18306―2001中国地震动参数区划图[S].北京:中国标准出版社,2001.
[14]中华人民共和国建设部.GB50011―2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[2]戴跃华,薛继乐.ANSYS在土石坝有限元计算中的应用[J].水利与建筑工程学报,2007,5(4):74-76.DAI Yue-hua,XUE Ji-le.Application of ANSYS in finite element anslysis of earth-rockfill dam[J].Journal of Water Resources and Architectural Engineering,2007,5(4):74-76.
[3]周健,孔戈,张冬茵.ANSYS在云龙水库心墙堆石坝三维地震反应分析中的应用[J].岩土力学,2006,27(12):2133-2136.ZHOU Jian,KONG Ge,ZHANG Dong-yin.Application of ANSYS to three-dimensional seismic response analysis of Yunlong reservoir earth core rockfill dam[J].Rock and Soil Mechanics,2006,27(12):2133-2136.
[4]SIYAHI BILGE,ARSLAN HAYDAR.Nonlinear dynamic finite element simulation of Alibey earth dam[J].Environmental Geology,2008,54(1):77-85
[5]朱百里,沈珠江.计算土力学[M].上海:上海科学技术出版社,1990:134-138.
[6]周健,董鹏,戚佩江.灰渣坝抗震稳定性的三维有效应力动力分析[J].水利学报,2000,(7):44-48.ZHOU Jian,DONG Peng,QI Pei-jiang.3-D dynamic effective stress analysis on the aseismic stability of flyash dam[J].Journal of Hydraulic Engineering,2000,(7):44-48.
[7]HUANG MAOSONG,WU SHIMING,ZIENKIEWICZ O C.Incompressible or nearly incompressible soil dynamic behaviour—A new staggered algorithm to circumvent restrictions of mixed formulation[J].Soil Dynamics and Earthquake Engineering,2001,21:169-179.
[8]JEAN H PREVOST.Partitioned solution procedure for simultaneous integration of coupled-field problems[J].Communications in Numerical Methods in Engineering,1997,13:239-247.
[9]周健,孔戈,张刚,等.基于耦合场分割算法的ANSYS二次开发及其应用[J].地震工程与工程振动,2006,26(2):73-79.ZHOU Jian,KONG Ge,ZHANG Gang,et al.ANSYS redevelopment and its application based on partitioned solution procedures of coupled mechanical systems[J].Earthquake Engineering and Engineering Vibration,2006,26(2):73-79.
[10]谢康和,周健.岩土工程有限元分析理论与应用[M].北京:科学出版社,2002.
[11]徐志英,沈珠江.地震液化的有效应力二维动力分析方法[J].华东水利学院学报,1981,(3):1-14.XU Zhi-ying,SHEN Zhu-jiang.2-D Dynamic analysis of effective stresses of seismic liquefaction[J].Journal of East China College of Hydraulic Engineering,1981,(3):1-14.
[12]王玲玲,何蕴龙.堆石坝地震反应分析[J].人民长江,2003,34(6):20-22.WANG Ling-ling,HE Yun-long.Analysis efects of earthquakes on rockfill dam[J].Yangtze River,2003,34(6):20-22.
[13]国家质量技术监督局.GB18306―2001中国地震动参数区划图[S].北京:中国标准出版社,2001.
[14]中华人民共和国建设部.GB50011―2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
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