U.S.-Singapore Cooperative Research: Experimental and Ana- lytical Studies of Nonlinear Structural Systems Under Earth-quake Loads

本提案请求拨款，允许南加州大学土木工程系Mihran S. Agbabian博士、Sami F. Masri博士和James C. Anderson博士与新加坡国立大学土木工程系Seng-Lip Lee博士、Somsak swaddiwudhiong博士、Ser-Tong Quek博士、Chi Young Liaw博士和Thambirajah Balendra博士进行为期24个月的研究。地震荷载作用下非线性结构体系的实验与分析协同研究方案。本文将研究三个研究课题：短周期钢框架的延性需求；钢框架在竖向和水平方向地震作用下的性能和梁柱弯矩连接适用于强震。该项目的主要目标是评估在与梁的连接处的箱形柱中加入更硬板的必要性，评估当前单元规范预测极限荷载下节点处发生的非线性行为的能力。并准确预测建筑结构抵抗破坏性地震运动而不破坏或倒塌的能力。这项研究将为美国国家科学基金会资助的南加州大学（USC）正在进行的研究增加国际合作的维度。ECE8617623。提出的合作研究将为地震工程专业研究结构对剧烈地震的反应提供有价值的数据。这个合作项目将为南加州大学的团队提供一个大规模的测试设施，在这个设施上可以测试全尺寸的建筑组件，而不是像南加州大学那样进行半尺寸的测试。比较两个设施取得的结果将提供有关这类试验的结垢效应的宝贵资料。该项目与“发展中国家科学项目”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，提高美国科学家和工程师与发展中国家同行之间的合作水平。两组合作者都是备受尊敬的科学家，他们在提案的领域有富有成效的出版记录。

This proposal requests funds to permit Dr. Mihran S. Agbabian, Dr. Sami F. Masri, and Dr. James C. Anderson, Department of Civil Engineering, University of Southern California, to pursue with Dr. Seng-Lip Lee, Dr. Somsak Swaddiwudhipong, Dr. Ser-Tong Quek, Dr. Chi Young Liaw, and Dr. Thambirajah Balendra, Department of Civil Engineering, National University of Singapore, for a period of 24 months, a program of cooperative experimental and analytical research on nonlinear structural systems under earthquake loads. The following three research topics will be studied: ductility demand for short period steel frames; behavior of steel frames subjected to earthquake motions in both vertical and horizontal directions; and beam-column moment connections for severe earthquakes. The main goals of this project are to evaluate the need to include stiffer plates in box columns at the connection to beams, to evaluate the ability of current element codes to predict the nonlinear behavior occurring at the joint under limit loads, and to accurately predict the capacity of building structures to resist damaging earthquake motions without failure or collapse. The research will add an international cooperative dimension to ongoing research at the University of Southern California (USC) supported by the National Science Foundation under Grant No. ECE8617623. The proposed cooperative research should provide valuable data to the earthquake engineering profession on structural response to severe earthquake shaking. This cooperative project will make available to the USC team a large scale test facility on which full-size building components can be tested rather than half-scale, as at USC. Comparison of results obtained at the two facilities would provide valuable information on scaling effects in such tests. This project is relevant to the objectives of the Science in Developing Countries Program which seeks to increase the level of cooperation between U.S. scientists and engineers and their counterparts in developing countries through the exchange of scientific information, ideas, skills, and techniques and through collaboration on problems of mutual benefit. Both groups of collaborators are highly respected scientists who have productive publication records in the field of the proposal.