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

该项目由NSF资助。 第90-23号公告， “修复和康复研究 抗震性能 结构. " 本项目研究的技术， 维修和 加强钢结构。 额外 强度和 可通过增加覆盖层来获得延展性 板，焊接，或 其他相对不显眼的技术， 允许 虽然大多数国家的 建筑遗迹 在使用中。 该项目作为一项联合研究进行 先河 华盛顿大学 明尼苏达州和 Preece，Goudie and Associates 大学 华盛顿作为协调 机构。 的 研究解决了 预测 旧混凝土的强度、刚度和延性 钢框架 通过实验和 分析研究。 的 本研究的目的是开发 理性 方法和准则，用于预测 抗震性能 旧的（如建造的）钢框架。 重点 将放在 的强度、刚度和延展性 建设和 它将集中在钢的类型， 结构中使用的 1900年至1950年的美国。 的 研究将提供 指导设计工程师选择 分析 地震预测程序 这些阻力 旧的结构，因此，它将 导致经济 修复旧的钢结构。

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.