Collaborative Research: Strengthening of Nonductile Moment Resisting Frames

非延性钢筋混凝土框架 二十多年前建造的，被认为是 与缓解有关的最紧迫的问题之一， 现有建筑物中的危险。 在过去的六 多年来，各种修复和加固技术， 钢筋混凝土框架已被调查，包括 增加结构墙、夹套或扩大柱 和/或梁，并增加钢支撑。 这项研究计划扩展了以前在 德克萨斯大学 该程序由框架测试组成， 以及对加强程序的关键细节进行测试， 非延性抗弯框架。 该项目分为 两个主要任务：（1）与添加有关的问题 结构墙到非延性框架，包括改进 柱的拼接性能，顶部界面缺陷的研究， 墙，界面剪切传递试验（轴向荷载和 （2）增加以下内容： 钢筋混凝土框架的钢支撑系统，包括 连续性连接详图，带支撑的系统 具有高的细长比，以及具有支架的系统， 细长比低。 这是一个合作研究项目， 德克萨斯州奥斯汀和H。J. Degenkolb Associates。 这 研究项目代表了大学的参与 得克萨斯州。

Nonductile reinforced concrete moment-resisting frames constructed twenty or more years ago have been indentified as one of the most pressing problems associated with mitigating hazards in the existing building inventory. During the past six years a variety of repair and strengthening techniques for reinforced concrete frames have been investigated and includes addition of structural walls, jacketing or enlarging columns and/or beams, and addition of steel bracing. This research program extends previous work conducted at the University of Texas. The program consists of frame tests as well as tests on critical details of strengthening procedures for nonductile moment-resisting frames. The project is divided into two major tasks: (1) Problems associated with addition of structural walls to nonductile frames, including improvement of column splice performance, study of interface flaws at top of wall, interface shear transfer tests (influence of axial load and dowels), and frame tests with infill walls; and (2) Addition of steel bracing systems to reinforced concrete frames including detailing of connections for continuity, systems with braces having high slenderness ratios, and systems with braces having low slenderness ratios. This is a collaborative research project between the University of Texas at Austin and H. J. Degenkolb Associates. This research project represents the participation by the University of Texas.