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

该项目得到了美国国家科学基金会第90-23号公告“结构抗震修复与恢复研究”的支持。本项目研究钢框架的修复和加固技术。可通过添加盖板、焊接、或其他相对不显眼的技术，允许在建筑物大部分保留的情况下进行加固在使用中。该项目是华盛顿大学、明尼苏达大学和普里斯共同开展的研究工作。Goudie and Associates与华盛顿大学作为协调机构。这项研究解决了强度预测的问题，通过试验和分析相结合的方法研究了旧钢框架的刚度和延性。这项研究的目的是开发合理的方法和指南来预测抗震性能。旧的(已建成的)钢框架。重点将放在建筑的强度、刚度和延性上，它将重点介绍1900年至1950年期间美国使用的钢结构类型。这项研究将为设计工程师选择预测地震的分析方法提供指导这些较老的结构的阻力，因此，它将导致对较老的钢结构进行经济修复。

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.