Practical Nonlinear Seismic Analysis of Arch Dams

该项目将为混凝土拱坝在地震荷载作用下的非线性分析提供实用的计算机程序。垂直收缩缝和水平裂缝面将近似地用在厚度方向上的单壳单元离散化的“涂抹”过程来表示。该程序将在问题的各种参数（接缝和裂缝的打开，关闭和滑动，水动力相互作用，基础相互作用等）的重要性与建模的准确性之间取得平衡。与目前的线性弹性分析相比，这种精度水平将足以对拱坝的地震安全性作出更明确的结论。计算需求将足够小，使程序可以作为实用工具。由于许多混凝土拱坝的地震评价都是基于线弹性分析的结果，因此需要一种实用的非线性分析工具。

The project will result in a computer program for practical nonlinear analysis of concrete arch dams under earthquake loading. Vertical contraction joints and horizontal cracking planes will be approximately represented by the 'smearing' procedure with a single shell element discretization in the thickness direction. The program will achieve a balance between the importance of various parameters of the problem (opening, closing and sliding of joints and cracks, hydrodynamic interaction, foundation interaction, etc.) and the accuracy to which they are modeled. The level of accuracy will be sufficient to make more definite conclusions regarding the seismic safety of arch dams than is currently possible with linearly elastic analysis. The computational requirements will be small enough so that the program can function as practical tool. Since many seismic assessments of concrete arch dams are unsatisfactorily based on results of linearly elastic analysis, a practical nonlinear analysis tool is needed.