Retrofitting Method for Reinforced Concrete Structures with Externally Prestressed Carbon Fiber Sheets
Retrofitting Method for Reinforced Concrete Structures with Externally Prestressed Carbon Fiber Sheets
复制标题
体外预应力碳纤维布加固混凝土结构的改造方法
DOI：
10.14359/5669
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
T. Kanda
中科院分区：
文献类型：
--
作者：
Zhishen Wu;T. Matsuzaki;K. Yokoyama;T. Kanda
本文基于预应力技术的概念，提出了一种在混凝土表面粘贴碳纤维布(CFS)的新方法，即先施加预应力再粘贴到混凝土表面。首先设计了一种适用于加固既有混凝土结构的预应力体系。通过试验验证了梁在提高抗弯强度、延性、刚度和抗裂性等方面的加固效果。为避免在释放过程中出现端部剥离破坏，还讨论了先张法和锚固处理的效果。并对CFS合理预应力水平的确定和配筋结构的优化进行了探讨。
In this paper, a new method to use Carbon Fiber Sheets (CFS) which is prestressed before they are bonded to the concrete surfaces based on the concept of prestressing technique is developed. A prestressing system is first designed to be suitable for strengthening existing concrete structures. An experimental program is carried out to verify the reinforcement effects of beams such as on the improvements of flexural strength, ductility, stiffness and crack resistance. To avoid the debonding failure near the ends upon releasing the pre-tensioned methods and the effects of anchorage treatments are also discussed. An effort is also made to investigate the determination of appropriate prestressing stress level of CFS and structural optimization of reinforcement.