混凝土重力坝沿建基面滑动的尖点突变模型研究
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摘要
应用突变理论,根据混凝土重力坝的特点,建立了一个考虑裂隙介质应变软化和水致弱化的尖点突变模型,并对混凝土重力坝沿建基面滑动的机理进行了分析,指出发生突变的必要条件取决于系统的内部特性,外部因素的影响起触发作用.也根据突变模型给出了系统突变时的临界位移值和临界外力.
According to characters of concrete gravity dam,a cusp catastrophe model of concrete gravity dam sliding along the contact surface between dam and foundation is established considering strain softening and water-permeating softening characters of the crack.Sliding mechanism of concrete gravity dam is analyzed.The authors point out that inner properties of the system is the main factor of instability of sliding while the action of outside environment will trigger the catastrophe.By analyzing the model,the critical displacement and force of the system corresponding to the catastrophe are presented.
According to characters of concrete gravity dam,a cusp catastrophe model of concrete gravity dam sliding along the contact surface between dam and foundation is established considering strain softening and water-permeating softening characters of the crack.Sliding mechanism of concrete gravity dam is analyzed.The authors point out that inner properties of the system is the main factor of instability of sliding while the action of outside environment will trigger the catastrophe.By analyzing the model,the critical displacement and force of the system corresponding to the catastrophe are presented.
引文
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[4]龙辉,秦四清,万志清.降雨触发滑坡的尖点突变模型[J].岩石力学与工程学报,2002,21(4):502-508.LONG Hui,QIN Si-qing,WAN Zhi-qing.Catastrophe analysisof rainfall—induced landslides[J].Chinese Journal of RockMechanics and Engineering,2002,21(4):502-508.
[5]刘军,秦四清,张倬元.缓倾角层状岩体失稳的尖点突变模型研究[J].岩土工程学报,2001,23(1):42-44.LIU Jun,QIN Si-qing,ZHANG Zhuo-yuan.Study on catas-trophic model with cusp point for failure of stratified rock masswith a gentle inclination[J].Chinese Journal of GeotechnicalEngineering,2001,23(1):42-44.
[6]潘越,解金玉.关于“缓倾角层状岩体失稳的尖点突变模型研究”的讨论[J].岩土工程学报,2001,23(4):516-518.PAN Yue,XIE Jin-yu.Discussion on“study on catastrophicmodel with cusp point for failure of stratified rock mass with agentle inclination”[J].Chinese Journal of Geotechnical Engi-neering,2001,23(4):516-518.
[7]秦四清,何怀锋.狭窄煤柱冲击地压失稳的突变理论分析[J].水文地质工程地质,1995(5):17-20.QIN Si-qing,HE Huai-feng.Catastrophe analysis for instabilityof impact area of narrow coal pillar[J].Hydrogeology and En-gineering Geology,1995(5):17-20.
[8]邓跃进,董兆伟,张正禄.大坝变形失稳的尖点突变模型[J].武汉测绘科技大学学报,1999,24(2):170-173.DENG Yue-jin,DONG Zhao-wei,ZHANG Zheng-lu.A cuspcatastrophe model of large dam deformation destabilization[J].Journal of Wuhan Technical University of Surveying and Map-ping,1999,24(2):170-173.
[9]秦四清,张倬元,王士天.非线形工程地质学导引[M].西安:西安交通大学出版社,1993.22-68.QIN Si-qing,ZHANG Zhuo-yuan,WANG Shi-tian.Introduc-tion of nonlinear engineering geology[M].Xi’an:Press of Xi’an Communication University,1993.22-68.
[10]殷有泉,杜静.地震过程中的燕尾型突变模型[J].地震学报,1994,10(4):416-422.YIN You-quan,DU Jing.Swallowtail catastrophe model ofearthquake process[J].Acta Seismologica Sinica,1994,10(4):416-422.
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