拱坝横缝间附加弹簧、阻尼的减震计算
|
摘要
建立有横缝拱坝的组合接触界面模型和界面间附加减震弹簧、阻尼的地震反应有限元计算模型,并将其应用于高拱坝减震措施的实际工程计算中。首先针对拱坝横缝在地震荷载作用下所处力学状态,提出一个组合的横缝非线性抗拉接触界面模型,该横缝界面模型的特点是,它即能体现横缝的强度效应,又能反映横缝被拉开后的张合、摩擦过程。在接触约束条件的罚函数处理方法基础上,建立拱坝横缝结点对之间附加减震弹簧、阻尼器的计算处理方法。在拱坝结构布置上通过布设阻尼器和弹簧的方式降低地震对拱坝强度的不良影响,达到提高坝体横缝的抗拉能力以及减震、优化高拱坝结构设计的目的。数值解计算反映出,拱坝横缝间附加弹簧、阻尼对于改善地震动作用下高拱坝结构整体的应力分布状况具有较明显效果。
A finite element combined-model is proposed and employed for the seismic response of high arch-dams with vertical contraction joints connected by aseismic springs and dampers. First a dynamic nonlinear contact combined-model of vertical contraction joints with pull-resistance capability is formulated for the mechanical state of high arch dams under seismic excitation, taking into consideration of the process of the opening and friction of pull-off joints. Using the penalty method, subjecting to contact constraint conditions for pull-off joints, a numerical model is then proposed for vertical contraction joints connected with aseismic springs and dampers. The negative seismic effects to the strength of arch dams may be reduced by connecting portions of arch dams with aseismic springs and dampers, thus enhancing the pull-and earthquake-resistance capability, and optimizing the construction of arch dams.
A finite element combined-model is proposed and employed for the seismic response of high arch-dams with vertical contraction joints connected by aseismic springs and dampers. First a dynamic nonlinear contact combined-model of vertical contraction joints with pull-resistance capability is formulated for the mechanical state of high arch dams under seismic excitation, taking into consideration of the process of the opening and friction of pull-off joints. Using the penalty method, subjecting to contact constraint conditions for pull-off joints, a numerical model is then proposed for vertical contraction joints connected with aseismic springs and dampers. The negative seismic effects to the strength of arch dams may be reduced by connecting portions of arch dams with aseismic springs and dampers, thus enhancing the pull-and earthquake-resistance capability, and optimizing the construction of arch dams.
引文
[1]楼梦麟,王东静.设有纵缝的重力坝地震反应分析方法[J].水利学报,1997,(3):78-83(Lou Menglin,Wang Dongjing.The seismic response analysis method for gravity dams with contraction joints[J].Journal of Hydraulic Engineering,1997,(3):78-83(in Chinese))
[2]李南生,周晶,林皋.有横缝高拱坝的动力接触模型及其数值解[J].水利学报,1999,(12):17-22(Li Nansheng,Zhou Jing,Lin Gao.The dynamic contact model for high arch dams with contraction joints and its numerical solution[J].Journal of Hydraulic Engineering,1999,(12):17-22(in Chinese))
[3]涂劲,陈厚群,杜修力.高拱坝非线性地震反应分析中横缝模拟方案研究[J].水力发电学报,2001,(2):18-25(Tu Jin,Chen Houqun,Du Xiuli.A study on the simulation scheme of joints in the nonlinear seismic response analysis of high arch dam[J].Journal of Hydroelectric Engineering,2001,(2):18-25(in Chinese))
[4]林皋,胡志强.拱坝横缝影响及有效抗震措施的研究[J].世界地震工程,2004,20(3):1-7(Lin Gao,Hu Zhiqiang.Studies of the effect of contraction joints and the effective earthquake-resistant measures of arch dams[J].World Earthquake Engineering,2004,20(3):1-7(in Chinese))
[5]王海波,李德玉.拱坝抗震设计理论与实践[M].北京:中国水利水电出版社,2006(Wang Haibo,Li Deyu.Aseismic Design of Arch Dam:Theory and Practice[M].Beijing:China Waterpower Press,2006(in Chinese))
[6]李南生.分缝结构高拱坝的动接触模型计算和工程中几个非线性力学问题的研究[D].大连:大连理工大学,1999
[7]王品江,王进廷,周元德,等.强震区高拱坝抗震措施比较[J].水利水电科技进展,2006,26(4):15-18(Wang Pinjiang,Wang Jinting,Zhou Yuande,et al.Comparative analysis of aseismic measures for high arch dams in meizoseismal area[J].Advances in Science and Technology of Water Resources,2006,26(4):15-18(in Chinese))
[8]陈观福,徐艳杰,张楚汉.强震区高拱坝横缝配筋抗震措施[J].清华大学学报:自然科学版,2003,43(2):266-269(Chen Guanfu,Xu Yanjie,Zhang Chuhan.Reinforcements across contraction joints of high arch dams to resist strong earthquakes[J].Journal of Tsinghua University:Science and Technology,2003,43(2):266-269(in Chinese))
[9]Fenves G L,Mojtahedi S,Reimer R B.Parameter study of joint opening effects on earthquake response of arch dams[R].Report No.UCB/EERC-92/05,Earthquake Engineering Research Center,College of Engineering,University of California at Berkeley,1992
[10]Belytschko T,Neal M O.Contact-impact by the pinball algorithm with penalty and lagrangian methods[J].Int.J.Num.Meth.Eng.,1991,(31):547-572
[11]李南生,沙德松,孙焕纯,等.冲击接触问题增广Lagrangian双共轭梯度法[J].固体力学学报,1999,20(1):54-61(Li Nansheng,Sha Desong,Sun Huanchun,et al.Reduced augmented lagrangian bi-conjugate gradient method for impact-contact problems[J].Acta Mechanica Solida Sinca,1999,20(1):54-61(in Chinese))
[12]Zhong Z H,Nilsson L.A contact searching algorithm for general contact problems[J].Com.Struct.,1989,33(1):197-209
[13]李南生,沙德松,周晶.一类基于点-面模式的低阶单元接触搜索方法[J].力学季刊,2000,21(1):139-144(Li Nansheng,Sha Desong,Zhou Jing.A new kind of contact searching algorithm for the lower FE based on‘Master surface-Slave node model’[J].Chinese Quarterly of Mechanics,2000,21(1):139-144(in Chinese))
[14]Simo J C,Govindjee S.Non-linear B-stability&symmetry preserving return mapping algorithms for plasticity and visco-plasticity[J].Int.J.Numer.Meth.Engrg.,1991,31:151
[2]李南生,周晶,林皋.有横缝高拱坝的动力接触模型及其数值解[J].水利学报,1999,(12):17-22(Li Nansheng,Zhou Jing,Lin Gao.The dynamic contact model for high arch dams with contraction joints and its numerical solution[J].Journal of Hydraulic Engineering,1999,(12):17-22(in Chinese))
[3]涂劲,陈厚群,杜修力.高拱坝非线性地震反应分析中横缝模拟方案研究[J].水力发电学报,2001,(2):18-25(Tu Jin,Chen Houqun,Du Xiuli.A study on the simulation scheme of joints in the nonlinear seismic response analysis of high arch dam[J].Journal of Hydroelectric Engineering,2001,(2):18-25(in Chinese))
[4]林皋,胡志强.拱坝横缝影响及有效抗震措施的研究[J].世界地震工程,2004,20(3):1-7(Lin Gao,Hu Zhiqiang.Studies of the effect of contraction joints and the effective earthquake-resistant measures of arch dams[J].World Earthquake Engineering,2004,20(3):1-7(in Chinese))
[5]王海波,李德玉.拱坝抗震设计理论与实践[M].北京:中国水利水电出版社,2006(Wang Haibo,Li Deyu.Aseismic Design of Arch Dam:Theory and Practice[M].Beijing:China Waterpower Press,2006(in Chinese))
[6]李南生.分缝结构高拱坝的动接触模型计算和工程中几个非线性力学问题的研究[D].大连:大连理工大学,1999
[7]王品江,王进廷,周元德,等.强震区高拱坝抗震措施比较[J].水利水电科技进展,2006,26(4):15-18(Wang Pinjiang,Wang Jinting,Zhou Yuande,et al.Comparative analysis of aseismic measures for high arch dams in meizoseismal area[J].Advances in Science and Technology of Water Resources,2006,26(4):15-18(in Chinese))
[8]陈观福,徐艳杰,张楚汉.强震区高拱坝横缝配筋抗震措施[J].清华大学学报:自然科学版,2003,43(2):266-269(Chen Guanfu,Xu Yanjie,Zhang Chuhan.Reinforcements across contraction joints of high arch dams to resist strong earthquakes[J].Journal of Tsinghua University:Science and Technology,2003,43(2):266-269(in Chinese))
[9]Fenves G L,Mojtahedi S,Reimer R B.Parameter study of joint opening effects on earthquake response of arch dams[R].Report No.UCB/EERC-92/05,Earthquake Engineering Research Center,College of Engineering,University of California at Berkeley,1992
[10]Belytschko T,Neal M O.Contact-impact by the pinball algorithm with penalty and lagrangian methods[J].Int.J.Num.Meth.Eng.,1991,(31):547-572
[11]李南生,沙德松,孙焕纯,等.冲击接触问题增广Lagrangian双共轭梯度法[J].固体力学学报,1999,20(1):54-61(Li Nansheng,Sha Desong,Sun Huanchun,et al.Reduced augmented lagrangian bi-conjugate gradient method for impact-contact problems[J].Acta Mechanica Solida Sinca,1999,20(1):54-61(in Chinese))
[12]Zhong Z H,Nilsson L.A contact searching algorithm for general contact problems[J].Com.Struct.,1989,33(1):197-209
[13]李南生,沙德松,周晶.一类基于点-面模式的低阶单元接触搜索方法[J].力学季刊,2000,21(1):139-144(Li Nansheng,Sha Desong,Zhou Jing.A new kind of contact searching algorithm for the lower FE based on‘Master surface-Slave node model’[J].Chinese Quarterly of Mechanics,2000,21(1):139-144(in Chinese))
[14]Simo J C,Govindjee S.Non-linear B-stability&symmetry preserving return mapping algorithms for plasticity and visco-plasticity[J].Int.J.Numer.Meth.Engrg.,1991,31:151
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