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

本提案申请资金，以允许南加州大学土木工程系的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的Lee Seng-Lip Lee博士、Somsak Swadiwudhiong博士、Ser-ong Quek博士、ChiYoung Liw博士和Thambirajah Balendra博士继续合作，为期24个月的地震作用下非线性结构体系的协同试验与分析研究项目。将对以下三个研究课题进行研究：短周期钢框架的延性需求；钢框架在竖向和水平向地震作用下的性能；以及严重地震下的梁柱弯矩连接。该项目的主要目标是评估在与梁的连接处在箱柱中加入加劲板的必要性，评估现有单元程序预测极限荷载下节点处发生的非线性行为的能力，并准确地预测建筑结构在不发生破坏或倒塌的情况下抵抗破坏性地震运动的能力。这项研究将为南加州大学(USC)正在进行的研究增加国际合作层面，该研究由美国国家科学基金会(National Science Foundation)资助。ECE8617623。建议的合作研究将为地震工程界在结构对强烈地震震动的反应方面提供有价值的数据。这个合作项目将为南加州大学团队提供一个大规模的测试设施，可以在那里测试全尺寸的建筑部件，而不是像在南加州大学那样进行一半规模的测试。比较在这两个设施中获得的结果将提供关于此类试验中的比例效应的宝贵信息。该项目与发展中国家科学计划的目标相关，该计划旨在通过交流科学信息、思想、技能和技术，以及通过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。这两组合作者都是备受尊敬的科学家，在该提案领域拥有多产的出版记录。

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.