内嵌碳纤维增强复合材料加固梁的延性提升方法

A Method to Improve the Ductility of Near Surface Mounted Carbon Fiber Reinforced Polymers Strengthened Reinforced Concrete Beam

摘要:

提出一种新的内嵌碳纤维增强复合材料（CFRP）延性加固的方法，使CFRP在极限状态下发生稳定、有限度的滑移，在充分利用CFRP强度的同时，避免CFRP断裂，从而提高加固构件的延性.介绍了内嵌CFRP延性加固的设计方法，并通过CFRP嵌条的黏结滑移试验和内嵌CFRP加固钢筋混凝土梁的弯曲试验验证了加固方法及设计方法的有效性.

Abstract:

A novel method was proposed to enhance the ductility of the near surface mounted (NSM) carbon fiber reinforced polymers (CFRP) strengthening system. The principle of the proposed method is to enable stable and controlled slip of CFRP reinforcements in ultimate state, so as to significantly improve the bending ductility and simultaneously fully use the tensile strength of CFRP without rupture. The related design algorithm was introduced, and the bondslip tests on NSMCFRP system and the bending tests on NSMCFRP strengthened reinforced concrete (RC) beams were conducted to verify the effectiveness of the proposed method and the accuracy of the design algorithm.