Presidential Young Investigators Award

该项目得到了总统青年研究人员奖励计划(PYI)的支持。该项目于91财年启动，为期5年。该项目的目标是进行以下研究：(A)分析更一般的类型基于钢的弹性和非弹性模型的碰撞，RC和砖石结构。将阐明各种结构参数和激励参数对碰撞响应和损伤的影响。开发一种非常简单和实用的工具来评估现有建筑或新设计的建筑的抗震性能，以防止可能的情况猛烈的事件。该方法将通过将其结果与现有建筑物的撞击破坏相关联来验证。制定减轻撞击的计划。基础隔震体系的碰撞研究。对相邻的钢结构、钢筋混凝土结构和砖石结构建筑物的冲击振动台试验。将对现有的试验模型进行修改和测试，以利用振动台研究撞击。(B)应用柔性连接(EBF)偏心支撑框架，以抵御风或中等地震。将进行真实尺寸的试验，以研究极限强度和变形、疲劳抗力、以及采用柔性连接的链路的故障模式。非线性分析连杆单元将被修改以模拟具有柔性连接的连杆的行为，并将研究使用该连接的EFB的全局行为。在此基础上，提出了柔性连接和EFB的设计方法。这项研究将通过开发将建模误差降至最低的技术来增强对城市背景下建筑物撞击的理解，并改进偏心支撑框架系统知识库。

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.