Performance-Optimized Reliability Analysis of Structural Systems

结构系统性能优化的可靠性分析

• 批准号: 8814695
• 负责人: Ross Corotis
• 金额: $ 16.51万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-12-01 至 1991-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8814695&HistoricalAwards=false
• 关键词: Performance; Optimized; Reliability; Analysis; Structural

The objective is to develop practical procedures whereby characterization of limit state consequences can be incorporated into an analysis for reliability-constrained structural system optimization. Multiobjective mathematical programming will be used to identify the limit state surface for multiple, independently varying loads. The identification of consequence for each region of the limit surface, rather than simply the traditional "failure" or "success," will permit the performance/reliability tradeoff to be studied. For a ductile frame with randomness in both loads and moment capacities, a linear program efficiently produces failure mode characteristics. For this case, it is possible to associate discrete load space regions with individual failure modes, and to assess the extent of structural distress for each mode. Efficient methods of combining Monte Carlo directional simulation with mathematical programming, and especially linear programming, will be utilized to permit a comprehensive assessment of structural system reliability. The procedures developed in this project will permit improved safety and economy of structures by considering design of the structural system as an entire entity. Powerful mathematical techniques now accessible to structural engineers can be used to optimize the structure as a whole, taking into account the reliability of performance and limit state consequences.

目的是制定切实可行的程序， 极限状态结果的特征可以被合并 引入可靠度约束结构体系分析 优化. 多目标数学规划将是 用于识别多个， 独立变化的负载。 后果认定 对于极限表面的每个区域，而不是简单地 传统的“失败”或“成功”，将允许 性能/可靠性权衡研究。 对于韧性 荷载和弯矩均具有随机性的框架， 线性规划有效地产生失效模式 特色 在这种情况下，可以将 具有单独失效模式的离散载荷空间区域，以及 评估每种模式的结构损坏程度。 结合蒙特卡罗方向模拟的有效方法 数学规划，特别是线性规划， 将用于全面评估 结构系统可靠性 在此过程中开发的程序 该项目将通过以下方式提高结构的安全性和经济性： 将结构体系的设计作为一个整体来考虑。 强大的数学技术，现在可以访问结构 工程师可以用来优化整个结构， 考虑到性能和极限的可靠性 国家后果。