Practical Nonlinear Seismic Analysis of Arch Dams

拱坝实用非线性地震分析

• 批准号: 9101690
• 负责人: John Hall
• 金额: $ 4.63万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-06-15 至 1993-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9101690&HistoricalAwards=false
• 关键词: Practical; Nonlinear; Seismic; Analysis; Arch

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.

该项目将产生一个计算机程序 用于混凝土的实际非线性分析 地震荷载作用下的拱坝 垂直 收缩缝和水平裂缝 平面将近似表示为 用一个外壳进行“涂抹”程序， 单元厚度离散 方向 该计划将实现一个 平衡各种重要性 问题的参数（打开、关闭 以及接缝和裂缝的滑动， 水动力相互作用，基础 互动等）以及精确到 他们是模范。 准确度将 足以使更明确 关于地震安全性的结论 比目前可能的拱坝， 线弹性分析 计算 要求将足够小， 程序可以作为实用工具。 由于对混凝土进行了许多地震评估， 拱坝是不令人满意的基础上 线弹性分析结果，a 需要实用的非线性分析工具。