Strengthening of Reinforced Concrete Frame Structures

对升级和改造结构的需求，以满足目前的需求， 抗震标准不断提高，迫切需要制定规范 实践和方法来指导工程师完成这项艰巨的任务。 一般来说，目前的建筑规范不解决维修和 加固问题及维修加固成功率 设计方案也高度依赖于工程师的经验 作为整个施工质量过程。 本研究项目 将讨论与加强经加强的 混凝土框架结构 这些主题包括剪切传递 与用新的混凝土构件夹套现有混凝土构件相关的问题 混凝土，提高抗弯强度和延性 通过提供钢支撑系统来抵抗地震 荷载作用下，改善弱梁和弱梁框架的性能 柱通过护套的成员，并提供横向阻力 通过填充框架结构的单个隔间。

The demand for upgrading and retrofitting structures to meet current seismic standards is increasing and there is a pressing need for codes of practice and methodologies to guide engineers in this large task. Generally, current building codes do not address repair and strengthening problems and the success of repair and strengthening schemes is highly dependent on the experience of the engineer as well as the overall construction quality process. This research project will address specific topics related to the strengthening of reinforced concrete frame structures. These topics include shear-transfer problems associated with jacketing existing concrete members with new concrete, increasing the strength and ductility of moment-resisting frames by providing a system of steel braces to resist earthquake loads, improving the performance of frames with weak beams and weak columns by jacketing the members, and providing the lateral resistance by infilling single bays of frame structures.