许多工程师认为面板堆石(Concrete-faced rockfill,简称CFR)坝本身具有抗震的性质,但大都是从理论上的考虑，然而至今尚无一座CFR坝经受过强震的考验来证明这个特性。现有的规范上缺少与CFRD相关的基于地震方面特性的考虑。其抗震特性一直受到人们的关注。在国外, 面板坝动力计算较多的是采用有限元法, 并在等价线性的假定下进行, 计算中一般都忽略基岩与坝体间的动力相互作用，对面板及面板与堆石体之间的相互作用等问题都没有处理。如何合理的模拟无限的地基对坝体抗震的影响，如何更好的仿真坝体堆石料的动力特性，一直是面板坝动力有限元计算的难点和热点。 本文首先介绍了一种改进的Higdon人工边界，此边界通过引入多个辅助变量简化了人工边界偏微方程的求解，并通过适当的变换形式将其在通用有限元软件上实现。最后通过数值实验验证了这种方法具有良好的稳定性和计算精度，并且实施简单方便，其他人工边界条件可参照本文方法，通过变换形式在通用有限元程序中实现。 目前常用的土动力应力应变关系有等价线性化本构模型和基于Masing准则的真非线性模型两类。基于Masing准则的非线性本构模型应用较广，虽然各种修正使之与多数材料都比较符合，但高维问题的加卸载判断仍然没有得到妥善的解决。 针对上述困难提出一种实用Masing准则土体动力本构模型。其特点是采用八面体应力应变统一各维问题，应用偏应变增量与偏应变能方法判断应力的加卸载，尤其关键的是采用剪应变积分来反映加载路径的影响。模型简单，实现方便，非常适应有限元应用。最后，将前面提到的改进的人工边界条件和提出的实用Masing准则用于堆石坝动力有限元分析。并对分析实践中遇到的各种接触问题、静力本构条件、动力本构参数的选取等问题做了一定的考虑，相应提出了一些解决方法。希望这些经验能对后来的研究提供一些有价值的参考。关键词：面板堆石坝，有限元，人工边界条件，动力本构，Masing准则，接触分析，抗震稳定

Many engineers have argued that the Concrete-faced rockfill dams (CFRD) if inherently safe against potential seismic damage ，but most conclusion are in theory. It is pointed out that,to date, no modern CFR dam has been tested under strong seismic shaking to prove or disprove the adequacy of its various design features . In fact, most CFR dams have been built in areas of extremely low seismicity, such as Australia and Brazil ,and it seems that some of the design concepts and features have envolved with no consideration to their seimic performance.On abroad, most seismic analysis of CFR dams took use of finite element methods(FEA),and under the assumption that the rockfill behavior follow equivalent linear under seismic. Notwithstanding , in the analysis ,the interact between the rock base and then dam body are ignored ,so is the contacts between concrete faces and the rockfill. It is always the focus and difficult problems that how to exactly simulate the interacts between infinite rock base and the dam ,and how to reasonably simulate the dynamic properties of the rockfills. In practical computation ,it is often essential to truncate the unbounded medium in order to render the computational domain finite and apply absorbing boundary conditions at the computational boundary . A new method based on Higdon’s absorbing boundary (HK ABCs) is introduced,which simplifies the computation procedure of the HK ABCs’ partial equation by introducing a number of auxiliary variables. Then appropriately transforming the simplified equations to the form that is feasibly applied to commercial finite element code.In the transformation of the FEA discrete equations , the cohesive forces which derived from the ABCs is moved to the right of the equation,treated as the boundary forces.In the resultant application , we can use any order of the ABCs in the FEA computation, meanwhile,keep FEA code running stably . Numerical examples are presented to illustrate the effectiveness of the method.Current limitations and possible extensions are also discussed. Nowadays, the frequently used soil dynamic cohesive and elastic strain -stress relations could be grouped into two types include equivalent linear model and genius nonlinear model .The former uses average shear modulus, though which could exactly predicts the peak response , it couldn’t trace the response of the structures over the entire history. Moreover , it need compute damp coefficients through frequency analysis; The genius nonlinear model uses current tangent modulus, and represent material damping through hysteresis curves .Therefore , the genius nonlinear is very appropriate for nonlinear time history analysis. Genius nonlinear material model which base on the Masing criteria enjoy a widely application in projects, and many modifications has enable it to reasonable simulate many material’s properities. However ,when apply to high dimensions ,it still has some constraints. Currently ,researchers seldom directly use cohesive-elastic model base on masing criteria to high dimensions. The thesis invent a New Modified Masing (NMM) Soil Dynamic Model. It uses the octahedral shear strain to unify 1D,2D and 3D problems, uses partial strain increments and partial strain energy increments to judge upload, unload and reload. Moreover, the key properities it have is representing the response history through integration of octahedral shear strain. Numerical experiments prove the exact, simple and feasible to FEA application features of the material model. In the last part, the application of the ABCs and the NMM model in the project are also considered. The ABCs are used combined with the modified masing criteria to simulate the behavior of BaiSha CFR dam under the assumed seismics. In the application, some details are also considered. Such as the contacts between concrete faces and the rockfills, the modifications of Duncan-Chang static material model and the selection of the parameters for the NMM model. From the application,a good of experiences are presented, and will be a valuable reference to the future projects. Key Words: concrete-faced rockfill dam, finite element ,artificial boundary conditions ,dynamic strain-stress model, Masing criteria, contact analysis, seimic stability.