| With the development of our national economic construction in China, the construction of hydropower development in an unprecedented flourishing period, batch of high dam had library construction, and in or near the building or construction of high dam in the library, the CFRD of considerable proportion, and in which there are many high rockfill dam in the earthquake, these high seismic design of high rockfill dam project design becomes a crucial link, therefore high rockfill dam seismic safety analysis and evaluation for engineering are also increasingly deep concern that.CFRD slope stability will directly affect the safety of construction projects and the economy, especially in the strong earthquake area of high rockfill dam construction, and adopt reasonable dam slope stability analysis method of CFRD slope stability analysis, according to the results of analysis guidance for engineering design are particularly important.In this paper, used finite element analysis method, combined with static and dynamic constitutive model of rockfill, presents a strong earthquake area of high CFRD slope stability analysis of static and dynamic finite element method. Combined with large-scale finite element software ADINA and the GEO-SLOPE characteristics of the dam structure calculation applied to the stress level as a bridge, study on a FEM analysis method of high CFRD dam slope stability through qualitative analysis and quantitative analysis of the idea of combining in the strong earthquake area. Specific studies on the content of the order include the following:(1)Several static and dynamic constitutive models that are widely used in the current are generally studied. Static rockfill material constitutive Duncan Chang E-B model and dynamic constitutive use of the Hardin-Drnevich hyperbolic constitutive model are used during this study, through a variety of static and dynamic rockfill constitutive model in the practical application of the comparative study.(2)Based on that predecessors had built structural dynamic analysis of unit dynamic equilibrium equation and dynamic equilibrium equations of structural systems, the dynamic equilibrium equation solving methods and steps which using dynamic time-history analysis method for dynamic analysis of CFRD are studied. Combined with the structural characteristics of CFRD, research and simulate finite element model rock fill dam body, face slab, contact face between face slab and rock fill and other components in the work state. When the calculation of stress and deformation of CFRD was running, grading load storage process and system damping of the simulation problems are discussed.(3)A variety of theories and methods of CFRD dam slope stability analysis that are used in the current are generally studied. Combined with ADINA and the GEO-SLOPE software characteristics of applications in stress and deformation and in the dam slope stability analysis of CFRD, a finite element analysis method are applied for high CFRD dam slope stable that it involved in the rockfill nolinear shearing strength characteristic are proposed and reararched. Firstly, according to the stress and deformation of CFRD three-dimensional finite calculation, the overall distribution of the dam stress level is obtained, and potential sliding failure stable cross-section location and the section within the search are sketched according to it under normal operating and circumstances encountered strong earthquake conditions. Secondly, methods and implementation steps that considered the non-linear shear strength characteristics of rockfill in the use of GEO-SLOPE software are studied. Finally, sliding resistance and safety factor for dynamic analysis of slope stability and the most dangerous slip surface search method are studied.(4)Combined with Zipingpu CFRD, using ADINA software had established its three-dimensional finite element model of static and dynamic finite element analysis and the GEO-SLOPE software had established its static and dynamic finite element model of slope stability respectively. Using the method for high CFRD slope stability that it is studieded in this paper, Zipingpu CFRD downstream and upstream dam slope had been calculated and analyzed. In this paper, through the analogy with other method and comparative analysis with earthquake measured data verified its reasonableness and accuracy.In this paper, above mentioned models and methods are of the theoretical exploration for the earthquake case study of high CFRD slope stability analysis methods in the strong earthquake areas and the high CFRD seismic stability and prediction, and the analysis calculation achievement also has an important reference and application value to the similar projects.
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