Evaluation of the Strength, Stiffness, and Ductility of Older Steel Frame Structures

本项目由国家自然科学基金公告第90-23号“结构抗震修复与修复研究”资助。本项目研究钢框架的修复和加固技术。额外的强度和延展性可以通过增加盖板，焊接，或者其他相对不显眼的技术，允许在建筑物大部分仍在使用的情况下进行加固。​这个项目是由华盛顿大学、明尼苏达大学和普利斯大学联合开展的，Goudie and Associates和华盛顿大学作为协调机构。本研究通过试验与分析相结合的方法，解决了老钢框架强度、刚度和延性预测问题。本研究的目的是开发合理的方法和指导方针来预测旧（建成）钢框架的抗震性能。重点将放在建筑的强度、刚度和延展性上，并将重点放在1900年至1950年间美国使用的钢结构类型上。这项研究将为设计工程师提供指导，帮助他们选择预测这些老结构抗震性能的分析方法。因此，它将导致旧钢结构的经济修复。

This project is supported under NSF Announcement No. 90-23, "Repair and Rehabilitation Research for Seismic Resistance of Structures." This project studies the techniques for repair and strengthening of steel frames. Additional strength and ductility can be obtained by adding cover plates, welding, or other relatively unobtrusive techniques that allow strengthening to proceed while most of the building remains in use. This project is conducted as a joint research effort between the University of Washington, University of Minnesota, and Preece, Goudie and Associates with the University of Washington serving as the coordinating institution. The research addresses the question of the prediction of the strength, stiffness and ductility of older steel frames through a combined experimental and analytical study. The objective of this research is the development of rational methods and guidelines for predicting the seismic performance of older (as built) steel frames. Emphasis will be placed on the strength, stiffness, and ductility of the building, and it will focus on the types of steel structures used in the United States between 1900 and 1950. The study will provide design engineers with guidance in selecting analytical procedures for predicting the seismic resistance of these older structures, and as a result it will lead to economical rehabilitation of older steel structures.