R/R: Strengthening and Repair of Nonductile Reinforced Concrete Frames Using External Steel Jackets and Plates (Collaborative Research)

R/R：使用外部钢套和钢板加固和修复非延性钢筋混凝土框架（合作研究）

• 批准号: 9016828
• 负责人: Michael Engelhardt
• 金额: $ 24.33万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-08-15 至 1994-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9016828&HistoricalAwards=false
• 关键词: Strengthening; Repair; Nonductile; Reinforced; Concrete

This project is supported under NSF Announcement NO. 90-23, "Repair and Rehabilitation Research for Seismic Resistance of Structures." The need to strengthen existing buildings with inadequate seismic resistance is an urgent problem in the field of earthquake engineering. A major class of existing structures identified as posing one of the greatest seismic hazards are nonductile concrete frames. A number of strengthening techniques for concrete frames include addition of structural walls, addition of steel bracing, and enlarging of columns and beams using reinforced concrete jackets. An alternative approach to concrete jackets is the use of external steel jackets and plates attached to the existing members. Steel jackets may offer significant advantages of reduced labor, reduced cost, and reduced disruption to existing facilities, as compared to the use of concrete jackets. The proposed research program will investigate critical issues associated with the use of external steel jackets and plates for strengthening nonductile concrete frames. The project consists of a number of interrelated tests, divided into three major phases: I - behavior of steel-to-concrete connections; II - behavior of individual members strengthened with steel jackets; and III - behavior of beam-column subassemblages strengthened with steel jackets. The overall objective of the project is to develop design guidelines for the effective implementation of steel jackets as a strengthening and repair technique. This project is one part of a collaborative research activity involving an academic institution and two professional engineering offices in a common effort to implement research results into practice.

该项目在NSF公告号下支持。 90-23，“对结构的地震抗性的修复和康复研究”。 在地震工程领域，以不足的地震抵抗力来加强现有建筑物是一个紧迫的问题。 一类主要的现有结构被确定为构成最大的地震危害之一是非统一的混凝土框架。 混凝土框架的许多加强技术包括添加结构壁，添加钢制饰板以及使用钢筋混凝土夹克扩大柱和梁的扩大。 混凝土夹克的另一种方法是使用附着在现有成员身上的外套和板。 与使用混凝土夹克相比，钢夹克可以提供降低人工，降低成本和减少对现有设施的干扰的显着优势。 拟议的研究计划将调查与使用外套和板相关的关键问题，以增强非载体混凝土框架。 该项目由许多相互关联的测试组成，分为三个主要阶段：I-钢与结合连接的行为； II-用钢夹克加强的个别成员的行为；和III-横梁柱亚汇编的行为，用钢夹克加强。 该项目的总体目的是制定设计指南，以有效实施钢夹克作为加强和维修技术。 该项目是涉及学术机构和两个专业工程办公室的协作研究活动的一部分，以实践实施研究结果。