Multi-Objective Reliability-Based Optimum Design and Upgrading of Seismic-Resistant RC Structures for Cost- Effectiveness

基于多目标可靠性的抗震 RC 结构优化设计和升级，实现成本效益

• 批准号: 9703725
• 负责人: Franklin Cheng
• 金额: $ 31万
• 依托单位: Missouri University of Science and Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-05-15 至 2000-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9703725&HistoricalAwards=false
• 关键词: Multi; Objective; Reliability; Based; Optimum

This project will develop a systematic approach to integrating optimization algorithms, seismic reliability engineering and scio-economics for determination of target reliabilities and formulation of cost-effectiveness design and upgrading of earthquake-resistant reinforced concrete structures. Cooperative research will be carried out at the University of Missouri-Rolla (UMR) and the University of California, Irvine (UCI). The following tasks will be conducted at UCI. (1) Approach for determination of optimal target reliability to revise and extend a platform for the systematic integration of the technical and scio-economic aspects of earthquake engineering: (2) Appraisal of current seismic criteria to examine the cost-effectiveness of specific existing criteria for earthquake-resistant design from the standpoint of minimum expected life-cycle cost; and (3) Critical examination and development of cost models to review and examine the available scio-economic models and information, including calibration and validation with recent earthquake damage data, and develop new or revised models for the proposal of reliability-based optimum design and upgrading of seismic resistant structures. At UMR the following five tasks will be considered. (1) Development of multi-objective optimization with fuzzy logic and genetic algorithm for target reliability constraints; (2) Development of computer program with building code requirements such as UBC 1994 for optimum design and upgrading of reinforced concrete structures; (3) Numerical studies of typical low-rise and high-rise office and apartment buildings for various seismic zones and target reliabilities; (4) Damage control of optimal-designed structures through nonlinear analysis; and (5) Assessment of design building code requirements and recommendations. Through collaboration and integration the joint effort is expected to establish a systematic procedure for determining optimal target reliability or acceptable risk for the design or upgrading of a specific structure or class of structures; (2) advance optimization technique with multi-objective function, robust and global convergence, target reliability as well as minimum expected life-cycle costs; and (3) make recommendation of optimal building code requirements to the professional community and building code writers.

该项目将开发一种系统方法，将优化算法、地震可靠性工程和社会经济学相结合，以确定目标可靠性并制定抗震钢筋混凝土结构的成本效益设计和升级。 合作研究将在密苏里大学罗拉分校 (UMR) 和加州大学欧文分校 (UCI) 进行。 以下任务将在 UCI 进行。 (1) 确定最佳目标可靠性的方法，以修订和扩展地震工程技术和社会经济方面系统集成的平台： (2) 评估当前地震标准，以检查特定现有标准的成本效益从最小预期生命周期成本的角度进行抗震设计； (3) 严格审查和开发成本模型，以审查和审查现有的社会经济模型和信息，包括使用最近的地震破坏数据进行校准和验证，并开发新的或修订的模型，以提出基于可靠性的优化设计和抗震结构升级改造。 UMR 将考虑以下五项任务。 (1) 发展针对目标可靠性约束的模糊逻辑和遗传算法多目标优化； (2) 开发符合UBC 1994等建筑规范要求的计算机程序，用于钢筋混凝土结构的优化设计和升级； （3）各地震带典型低层、高层办公楼、公寓楼及目标可靠度的数值研究； (4)通过非线性分析优化设计结构的损伤控制； (5) 设计建筑规范要求和建议的评估。 通过协作和整合，预计共同努力建立一个系统程序，以确定特定结构或结构类别的设计或升级的最佳目标可靠性或可接受的风险； (2) 先进的多目标函数、鲁棒性和全局收敛性、目标可靠性以及最小预期生命周期成本的优化技术； (3) 向专业团体和建筑规范编写者提出最佳建筑规范要求的建议。