Presidential Young Investigators Award

总统青年研究员奖

• 批准号: 9157942
• 负责人: Kazuhiko Kasai
• 金额: $ 21.25万
• 依托单位: Illinois Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-07-15 至 1993-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9157942&HistoricalAwards=false
• 关键词: Presidential; Young; Investigators; Award

This project is supported under the Presidential Young Investigator Award Program (PYI). The project is initiated in FY 91 for a 5-year period. The objectives of the project are to conduct the following studies: (a) Analysis of more general types of pounding based on elastic and inelastic modeling of steel, RC, and masonry structures. The effect of various structural and excitation parameters on pounding response and damage will be clarified. Development of a very simple and practical tool to assess seismic performance of already existing buildings or newly designed buildings against possible pounding incidents. The method will be verified by correlating its results with pounding damage of existing buildings. Development of pounding mitigation scheme. Study on pounding of base isolation system. Shaking table tests for pounding of adjacent buildings of steel, R.C., and masonry construction. Existing test models will be modified and tested to study pounding using shake table. (b) Application of flexible connections for (EBF) Eccentrically Braced Frames to resist winds or moderate earthquakes. Real size experiments will be conducted to investigate ultimate strength and deformation, fatigue resistance, and failure modes of the link employing the flexible connection. Nonlinear analysis link element will be modified to simulate the behavior of the link with the flexible connection, and global behavior of an EFB employing the connection will be studied. Based on these, design method for the flexible connection as well as the EFB will be proposed. This research will enhance the understanding of building pounding in the urban context by developing techniques which minimize modelling inaccuracies and improve the knowledge base on eccentrically braced frame systems.

该项目由总统青年研究者奖励计划（PYI）支持。该项目于1991财年启动，为期5年。该项目的目的是进行以下研究：(a)基于钢、钢筋混凝土和砖石结构的弹性和非弹性模型分析更一般类型的冲击。阐明了不同结构参数和激励参数对冲击响应和损伤的影响。开发一种非常简单实用的工具，以评估现有建筑物或新设计建筑物的抗震性能，防止可能发生的撞击事件。将该方法的计算结果与既有建筑的冲击损伤进行比较，验证了该方法的有效性。冲击缓解方案的制定。基础隔震系统冲击的研究。相邻钢、钢筋混凝土和砖石结构建筑物冲击的振动台试验。将对现有的试验模型进行修改和试验，以研究振动台的冲击。(b)应用（EBF）偏心支撑框架的柔性连接，以抵御风或中等地震。将进行实际尺寸实验，以研究采用柔性连接的链接的极限强度和变形，疲劳抗力和破坏模式。将非线性分析连杆单元进行修改，以模拟具有柔性连接的连杆的行为，并研究采用柔性连接的EFB的整体行为。在此基础上，提出了柔性连接的设计方法和EFB的设计方法。这项研究将通过开发最小化建模不准确性的技术和改进偏心支撑框架的知识基础，增强对城市背景下建筑冲击的理解系统。