Theory and methods of global stability analysis for high arch dam  

作　　者：REN QingWen 1,LI Qiang 1,JIANG YaZhou 2 & JIANG XiaoLan 3 1 Department of Engineering Mechanics,Hohai University,Nanjing 210098,China 2 College of Water Conservation and Hydropower Engineering,Hohai University,Nanjing 210098,China 3 Changjiang Academy of Sciences,Wuhan 430010,China 

出　　处：《Science China(Technological Sciences)》2011年第S1期9-17,共9页中国科学（技术科学英文版）

基　　金：supported by the National Basic Research Program of China("973" Project)(Grant No.2007CB714104);the National Natural Science Foundation of China(Grant No.51079045)

摘　　要：The global stability of high arch dam is one of the key problems in the safety study of arch dams,but no feasible method with theoretical basis is available.In this paper,based on the stability theory of mechanical system,it is demonstrated that the global failure of high arch dams belongs to a physical instability starting from local strength failure,which is the extreme point instability according to the characteristics of load-displacement curve obtained from the failure process of dam-foundation system. So the global failure of dam-foundation system should be studied with the stability theory of mechanical system.It is also pointed out that the current stability analysis methods used in engineering are consistent with the stability theory,but not established according to the mechanical system stability theory directly.A perfect method can be obtained through the study of physical disturbance equations.The global stability of high arch dam is one of the key problems in the safety study of arch dams,but no feasible method with theoretical basis is available.In this paper,based on the stability theory of mechanical system,it is demonstrated that the global failure of high arch dams belongs to a physical instability starting from local strength failure,which is the extreme point instability according to the characteristics of load-displacement curve obtained from the failure process of dam-foundation system. So the global failure of dam-foundation system should be studied with the stability theory of mechanical system.It is also pointed out that the current stability analysis methods used in engineering are consistent with the stability theory,but not established according to the mechanical system stability theory directly.A perfect method can be obtained through the study of physical disturbance equations.

关 键 词：high ARCH DAM global stability PHYSICAL INSTABILITY EXTREME point INSTABILITY 

分 类 号：TV642.4[水利工程—水利水电工程] TV312