Research in Support of a Transparent Seismic Design Methodology

支持透明抗震设计方法的研究

• 批准号: 9322524
• 负责人: Helmut Krawinkler
• 金额: $ 14.99万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-10-01 至 1998-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9322524&HistoricalAwards=false
• 关键词: Research; Support; Transparent; Seismic; Design

9322524 Krawinkler This research project will develop basic data needed to formalize and implement a demand/capacity based seismic design methodology that explicitly considers the inelastic response characteristics of structures. The objective is to make the design process transparent and equally applicable to the seismic evaluation of existing structures and seismic designs of new structures, using conventional structural systems as well as new structural systems, materials, and innovative energy dissipation or base isolation systems. The design objective is to provide a structure with sufficient strength, stiffness, and ductility such that the deformation demands imposed by design earthquakes do not exceed the deformation capabilities associated with design limit states (e.g. serviceability, collapse safety). It is intended to achieve a consistent level of seismic protection for structures of different configurations and structural systems, which may be located in regions of different seismicity. The proposed research is directed towards achieving this goal by focusing on the following objectives: (1) evaluate, refine, modify, and develop (if needed) the basic concepts on which a consistent and transparent seismic design methodology can be based; (2) develop a comprehensive set of information on seismic demand parameters for inelastic SDOF systems, which will form the basis for the design of MDOF structures; (3) develop the knowledge needed to modify the SDOF demand parameters in a manner that accounts for multi-mode effects present in real MDOF structures; (4) investigate the effects of ground motion characteristics for expected cumulative damage effects; and (5) formalize and test the proposed seismic design methodology in order to make it useful for the engineering profession. The information on demands and capacities created in the project will have an impact on the state of knowledge and will facilitate and accelerate the adoption of more realistic and transparent design procedures. ***

9322524 Krawinkler该研究项目将开发出形式化和实施基于需求/容量的抗震设计方法所需的基本数据，该方法明确考虑了结构的非弹性响应特征。目标是使设计过程透明，并同样适用于现有结构的抗震评估和新结构的抗震设计，使用传统的结构体系，以及新的结构体系，材料和创新的能量耗散或基础隔离系统。设计目标是提供具有足够强度、刚度和延展性的结构，从而使设计地震施加的变形要求不超过与设计极限状态（例如可使用性、倒塌安全性）相关的变形能力。它旨在对可能位于不同地震活动性区域的不同构型和结构体系的结构实现一致的抗震防护水平。拟议的研究旨在通过关注以下目标来实现这一目标：(1)评估、完善、修改和发展（如果需要的话）作为一致和透明的抗震设计方法基础的基本概念；(2)建立一套完整的非弹性单自由度体系抗震需求参数信息，为多自由度结构的设计提供依据；(3)开发修改SDOF需求参数所需的知识，以解释实际mof结构中存在的多模态效应；(4)研究地震动特性对预期累积损伤效应的影响；(5)将提出的抗震设计方法形式化并进行测试，以使其对工程专业有用。关于项目中产生的需求和能力的资料将对现有的知识状况产生影响，并将促进和加速采用更现实和透明的设计程序。＊＊＊