Innovative Techniques for Strengthening RC Frame Systems

该项目的目的是研究一种修复方案的性能，该方案可用于纠正框架系统中的“薄弱环节”，但将简化施工过程，减少与大多数修复项目相关的时间和不便。该程序是基于使用预制墙段来弥补柱和楼板之间的填充物，并通过使用后张筋垂直延伸到柱处的结构来补充现有柱的轴向拉伸能力。​本研究分为三个部分。第一部分研究了面板闭合条的构造技术和对其性能的评价。第二部分是针对在填充板-现有框架界面传递力的各种方法的研究。最后，将构建一个包含多层填充结构的大型模型，以验证性能并提供整体系统响应的数据。本项目是“结构抗震修复与重建”研究计划的一部分。

The objective of this project is to study the performance of a rehabilitation scheme which can be used to correct the "weak links" in a frame system, but will simplify the construction process and reduce the time and inconvenience associated with most rehabilitation projects. The procedure is based on the use of precast wall segments to make up the infill between columns and floors and to supplement the axial tensile capacity of the existing columns through the use of post-tensioned tendons extending vertically through the structure at the columns. The research is divided into three parts. The first part involves a study of techniques for constructing the panel closure strips and evaluating their performance. The second part is directed toward a study of various methods for transferring forces at the infill panel-existing frame interface. Finally, a large-scale model comprising several stories of the structure with infills will be constructed to verify performance and provide data on overall system response. This project is a part of research initiative on "Seismic Repair and Rehabilitation of Structures."