预应力CFRP加固混凝土结构

Concrete structures strengthened with prestressed CFRP reinforcement

混凝土结构是使用范围最广的结构形式,由于混凝土碳化、钢筋腐蚀、保护层脱落等问题,导致混凝土结构承载力不足,影响继续使用。对结构进行加固维修使其满足安全性、耐久性要求。传统的表面粘贴碳纤维增强复合材料(CFRP)加固混凝土结构未能充分利用CFRP的强度。为了进一步提高混凝土梁的抗弯性能,抑制梁的变形和裂缝开展,充分利用CFRP特点,引入预应力的概念,将预应力混凝土梁的概念应用到碳纤维增强复合材料上。为今后开展相关的研究和应用提供一定的帮助与借鉴。

Concrete structure is the most widely used structural form.Due to the problems such as carbonation of concrete, corrosion of steel bar and concrete cover separation, the load carry capacity of concrete structure is insufficient,which affects the use of concrete structure.The structure is strengthened to meet the requirement of the safety and durability.The traditional strengthening method of concrete structure is external bonded carbon fiber reinforced polymer （CFRP） fails to make full use of the strength of CFRP.In order to improve the flexural performance of concrete beams, restrain the deformation and cracks of the beam, and make full use of the characteristics of CFRP, the concept of prestressing has been introduced, and provide some help and reference for future research and application.