U.S.-Korea Cooperative Research on Reliability-Based Rehabi-litation of Civil Structures Against Natural Hazards

本提案请求资金允许阿尔弗雷多·h·s博士。伊利诺斯大学土木工程系的Ang博士和普林斯顿大学土木工程与运筹研究部的Masanobu Shinozuka博士，与汉阳大学和韩国军事学院土木工程系的赵孝南博士和韩国科学技术院土木工程系的Yun Chung-Bang博士一起，为期24个月的基于可靠性的土木结构抵御自然灾害重建合作研究项目。这些研究人员将开发钢和钢筋混凝土结构的定量损伤模型，并使用它们来评估现有土木结构的损伤程度和/或恶化程度。他们还将为现场试验开发无损检测和基于知识的专家系统。这些活动的结果将用于制定对桥梁和其他结构的可靠性进行评级的战略。然后，这些评级可用于建议更换或修复。土木结构接近其原有设计寿命时，必须评估其受损及/或恶化的程度，以决定是否需要修复或更换。该评估还可以用于(1)确定它们在遭受极端载荷（如繁忙的交通和自然灾害（大风和地震））时的可靠性，以及(2)决定修复程度或是否需要更换。这个项目所解决的问题是共同的问题，解决这些问题对美国和韩国都有好处。该项目与美韩合作科学项目的目标相关，该项目旨在通过科学信息、思想、技能和技术的交流以及在互利问题上的合作，提高美韩科学家和工程师之间的合作水平。

This proposal requests funds to permit Dr. Alfredo H-S. Ang, Department of Civil Engineering, University of Illinois, and Dr. Masanobu Shinozuka, Department of Civil Engineering and Operations Research, Princeton University, to pursue with Dr. Hyo-Nam Cho, Department of Civil Engineering, Hanyang University and Korea Military Academy, and Dr. Chung-Bang Yun, Department of Civil Engineering, Korea Advanced Institute of Science and Technology, for a period of 24 months, a program of cooperative research on reliability-based rehabilitation of civil structures against natural hazards. These researchers will develop quantitative damage models for steel and reinforced concrete structures and use them to assess the degree of damage and/or deterioration of existing civil structures. They also will develop nondestructive tests and knowledge-based expert systems for field experimentation. The results of these activities will be used to develop a strategy for rating the reliability of bridges and other structures. The ratings then may be used to recommend replacement or rehabilitation. As civil structures approach their original intended design life, the degree of damage and/or deterioration must be assessed in order to determine if they need to be rehabilitated or replaced. This assessment also can be used to (1) determine their reliability when subjected to extreme loads such as heavy traffic and natural hazards (high winds and earthquakes) and (2) reach decisions on the degree of rehabilitation or whether replacement is required. The problems addressed by this project are common ones whose solution would be beneficial to the United States and Korea. This project is relevant to the objectives of the U.S.-Korea Cooperative Science Program which seeks to increase the level of cooperation between U.S. and Korean scientists and engineers through the exchange of scientific information, ideas, skills, and techniques and through collaboration on problems of mutual benefit.