重力坝纵缝非连续接触地震反应分析
|
摘要
采用非线性动力时程分析方法,通过超载响应分析,初步研究了设纵缝重力坝的抗震能力.运用弥散裂缝模型模拟混凝土在强震下的开裂行为,采用基于罚函数法的接触模型模拟纵缝在动力荷载下的力学行为.对比不设纵缝的计算模型,结果表明纵缝改变了坝体应力分布,降低了坝体的抗震能力.通过对开裂比和抗滑安全系数的分析,判定该设纵缝重力坝段的极限抗震能力为0.6g.
The anti-seismic capacity of concrete gravity dam with longitudinal joints is preliminarily studied by using a nonlinear dynamic time-history procedure with overload response analysis.Smeared cracking model is employed to simulate the cracking of concrete during strong earthquake,and the mechanical behavior of the longitudinal joint under dynamic load is simulated by contact model based on penalty method.Comparing with the results of calculation model without longitudinal joints,it is found that the longitudinal joints have changed the distribution of stress in dam and the anti-seismic capacity of the dam is reduced.Based on the analyses of the cracking ratio and the anti-slide safety factor,the maximum anti-seismic capacity of the studied dam with longitudinal joints is evaluated as 0.6g.
The anti-seismic capacity of concrete gravity dam with longitudinal joints is preliminarily studied by using a nonlinear dynamic time-history procedure with overload response analysis.Smeared cracking model is employed to simulate the cracking of concrete during strong earthquake,and the mechanical behavior of the longitudinal joint under dynamic load is simulated by contact model based on penalty method.Comparing with the results of calculation model without longitudinal joints,it is found that the longitudinal joints have changed the distribution of stress in dam and the anti-seismic capacity of the dam is reduced.Based on the analyses of the cracking ratio and the anti-slide safety factor,the maximum anti-seismic capacity of the studied dam with longitudinal joints is evaluated as 0.6g.
引文
[1]林皋,陈健云.混凝土大坝的抗震安全评价[J].水利学报,2001(2):8-15.LIN Gao,CHEN Jian-yun.Seismic safetyevaluation of large concrete dams[J].Journal ofHydraulic Engineering,2001(2):8-15.(in Chinese)
[2]林皋.汶川大地震中大坝震害与大坝抗震安全性分析[J].大连理工大学学报,2009,49(5):657-666.LIN Gao.Performance of dams suffered inWenchuan earthquake and seismic safety analysis ofdams[J].Journal of Dalian University ofTechnology,2009,49(5):657-666.(in Chinese)
[3]Rashid Y R.Ultimate strength analysis ofprestressed concrete pressure vessels[J].NuclearEngineering and Design,1968,7(4):334-344.
[4]Rots J G,De Borst R.Analysis of mixed modefracture in concrete[J].Journal of EngineeringMechanics,1987,113(11):1739-1758.
[5]WANG Guang-lun,Pekau O A,ZHANG Chu-han,et al.Seismic fracture analysis of concrete gravitydams based on nonlinear fracture mechanics[J].Engineering Fracture Mechanics,2000,65(1):67-87.
[6]Mirzabozorg H,Ghaemian M.Non-linear behaviorof mass concrete in three-dimensional problemsusing a smeared crack approach[J].EarthquakeEngineering and Structural Dynamics,2005,34(3):247-269.
[7]沈怀至,周元德,王进廷.基于弥散裂缝模型的重力坝简化地震分析[J].水利学报,2007,38(10):1221-1227.SHEN Huai-zhi,ZHOU Yuan-de,WANG Jin-ting.Simplified earthquake analysis of concretegravity dams using smeared crack approach[J].Journal of Hydraulic Engineering,2007,38(10):1221-1227.(in Chinese)
[8]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 Meng-lin,WANG Dong-jing.The seismicresponse analysis method for gravity dams withcontraction joints[J].Journal of HydraulicEngineering,1997(3):78-83.(in Chinese)
[9]涂劲,侯顺载,陈厚群.纵缝对重力坝地震反应影响的研究[J].水利学报,2000(12):53-58.TU Jin,HOU Shun-zai,CHEN Hou-qun.Influence of longitudinal joint on seismic response ofgravity dam[J].Journal of Hydraulic Engineering,2000(12):53-58.
[10]张贵科,徐卫亚.重力坝纵缝非连续接触的数值模拟[J].水利学报,2005,36(8):982-987.ZHANG Gui-ke,XU Wei-ya.Numerical simulationof discontinuous contact behavior of verticalconstruction joints in gravity dam[J].Journal ofHydraulic Engineering,2005,36(8):982-987.(inChinese)
[11]王刚,马震岳,张运良.考虑纵缝影响的重力坝静动力荷载组合作用分析[J].水利学报,2009,40(2):244-249.WANG Gang,MA Zhen-yue,ZHANG Yun-liang.Analysis on combined action of dynamic and staticloads of gravity dams in consideration of the effectof longitudinal joints[J].Journal of HydraulicEngineering,2009,40(2):244-249.(in Chinese)
[12]王刚,马震岳,张运良,等.考虑重力坝纵缝结合程度的非线性有限元数值模拟[J].水力发电学报,2009,28(2):41-46.WANG Gang,MA Zhen-yue,ZHANG Yun-liang,et al.Simulation of connecting degree oflongitudinal joints in gravity dams by nonlinearfinite element method[J].Journal of HydroelectricEngineering,2009,28(2):41-46.(in Chinese)
[13]Benson D J,Hallquist J O.A single surface-contactalgorithm for the post-buckling analysis of shellstructures[J].Computer Methods in AppliedMechanics and Engineering,1990,78(2):141-163.
[14]王勖成.有限单元法[M].北京:清华大学出版社,2003.WANG Xu-cheng.Finite Element Method[M].Beijing:Tsinghua University Press,2003.(inChinese)
[15]潘坚文,张楚汉,徐艳杰.强震输入方式与地基模型对重力坝反应的影响[J].岩土工程学报,2010,32(1):82-88.PAN Jian-wen,ZHANG Chu-han,XU Yan-jie.Influence of seismic input mechanism and foundationmodels on response of gravity dams[J].ChineseJournal of Geotechnical Engineering,2010,32(1):82-88.(in Chinese)
[16]江见鲸,陆新征,叶列平.混凝土结构有限元分析[M].北京:清华大学出版社,2005.JIANG Jian-jing,LU Xin-zheng,YE Lie-ping.Finite Element Analysis of Concrete Structures[M].Beijing:Tsinghua University Press,2005.(inChinese)
[17]范书立.混凝土重力坝的动力模型破坏试验及可靠性研究[D].大连:大连理工大学,2007.FAN Shu-li.Research on dynamic failure test andreliability of concrete gravity dam[D].Dalian:Dalian University of Technology,2007.(inChinese)
[18]王刚.长服役期重力坝整体安全性研究与加固施工数值仿真分析[D].大连:大连理工大学,2008.WANG Gang.Research of overall structural safetyand numerical simulation of reinforcing constructionfor long-term operating gravity dam[D].Dalian:Dalian University of Technology,2008.(inChinese)
[2]林皋.汶川大地震中大坝震害与大坝抗震安全性分析[J].大连理工大学学报,2009,49(5):657-666.LIN Gao.Performance of dams suffered inWenchuan earthquake and seismic safety analysis ofdams[J].Journal of Dalian University ofTechnology,2009,49(5):657-666.(in Chinese)
[3]Rashid Y R.Ultimate strength analysis ofprestressed concrete pressure vessels[J].NuclearEngineering and Design,1968,7(4):334-344.
[4]Rots J G,De Borst R.Analysis of mixed modefracture in concrete[J].Journal of EngineeringMechanics,1987,113(11):1739-1758.
[5]WANG Guang-lun,Pekau O A,ZHANG Chu-han,et al.Seismic fracture analysis of concrete gravitydams based on nonlinear fracture mechanics[J].Engineering Fracture Mechanics,2000,65(1):67-87.
[6]Mirzabozorg H,Ghaemian M.Non-linear behaviorof mass concrete in three-dimensional problemsusing a smeared crack approach[J].EarthquakeEngineering and Structural Dynamics,2005,34(3):247-269.
[7]沈怀至,周元德,王进廷.基于弥散裂缝模型的重力坝简化地震分析[J].水利学报,2007,38(10):1221-1227.SHEN Huai-zhi,ZHOU Yuan-de,WANG Jin-ting.Simplified earthquake analysis of concretegravity dams using smeared crack approach[J].Journal of Hydraulic Engineering,2007,38(10):1221-1227.(in Chinese)
[8]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 Meng-lin,WANG Dong-jing.The seismicresponse analysis method for gravity dams withcontraction joints[J].Journal of HydraulicEngineering,1997(3):78-83.(in Chinese)
[9]涂劲,侯顺载,陈厚群.纵缝对重力坝地震反应影响的研究[J].水利学报,2000(12):53-58.TU Jin,HOU Shun-zai,CHEN Hou-qun.Influence of longitudinal joint on seismic response ofgravity dam[J].Journal of Hydraulic Engineering,2000(12):53-58.
[10]张贵科,徐卫亚.重力坝纵缝非连续接触的数值模拟[J].水利学报,2005,36(8):982-987.ZHANG Gui-ke,XU Wei-ya.Numerical simulationof discontinuous contact behavior of verticalconstruction joints in gravity dam[J].Journal ofHydraulic Engineering,2005,36(8):982-987.(inChinese)
[11]王刚,马震岳,张运良.考虑纵缝影响的重力坝静动力荷载组合作用分析[J].水利学报,2009,40(2):244-249.WANG Gang,MA Zhen-yue,ZHANG Yun-liang.Analysis on combined action of dynamic and staticloads of gravity dams in consideration of the effectof longitudinal joints[J].Journal of HydraulicEngineering,2009,40(2):244-249.(in Chinese)
[12]王刚,马震岳,张运良,等.考虑重力坝纵缝结合程度的非线性有限元数值模拟[J].水力发电学报,2009,28(2):41-46.WANG Gang,MA Zhen-yue,ZHANG Yun-liang,et al.Simulation of connecting degree oflongitudinal joints in gravity dams by nonlinearfinite element method[J].Journal of HydroelectricEngineering,2009,28(2):41-46.(in Chinese)
[13]Benson D J,Hallquist J O.A single surface-contactalgorithm for the post-buckling analysis of shellstructures[J].Computer Methods in AppliedMechanics and Engineering,1990,78(2):141-163.
[14]王勖成.有限单元法[M].北京:清华大学出版社,2003.WANG Xu-cheng.Finite Element Method[M].Beijing:Tsinghua University Press,2003.(inChinese)
[15]潘坚文,张楚汉,徐艳杰.强震输入方式与地基模型对重力坝反应的影响[J].岩土工程学报,2010,32(1):82-88.PAN Jian-wen,ZHANG Chu-han,XU Yan-jie.Influence of seismic input mechanism and foundationmodels on response of gravity dams[J].ChineseJournal of Geotechnical Engineering,2010,32(1):82-88.(in Chinese)
[16]江见鲸,陆新征,叶列平.混凝土结构有限元分析[M].北京:清华大学出版社,2005.JIANG Jian-jing,LU Xin-zheng,YE Lie-ping.Finite Element Analysis of Concrete Structures[M].Beijing:Tsinghua University Press,2005.(inChinese)
[17]范书立.混凝土重力坝的动力模型破坏试验及可靠性研究[D].大连:大连理工大学,2007.FAN Shu-li.Research on dynamic failure test andreliability of concrete gravity dam[D].Dalian:Dalian University of Technology,2007.(inChinese)
[18]王刚.长服役期重力坝整体安全性研究与加固施工数值仿真分析[D].大连:大连理工大学,2008.WANG Gang.Research of overall structural safetyand numerical simulation of reinforcing constructionfor long-term operating gravity dam[D].Dalian:Dalian University of Technology,2008.(inChinese)
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