Abstract: Presently,there are very few researches and definitive conclusions on the anchorage system of CFRP-strenghtened RC beam-column joints.ACI440.2R emphasized that special attention should be paid to the anchorage of CFRP laminates,and only proposed some conceptual anchorage measures.GB50367-2013 suggested quantitative anchorage measures,which were lack of theoretical and experimental support.To investigate the reliability and effectiveness of an anchorage system,this study tested six CFRP-strenghtened RC beam-column joints with different anchorage systems.The experimental results show that the anchorage measures suggested by the codes cannot ensure the safety of a strenghtened member,that mechanical anchorage system is reliable and effective,that the foot-plate length and stiffness of the anchorage have significant effects on its anchoring effectiveness,and the suitable foot-plate length of the anchorage is no more than 100 mm,and that the external anchorage does not destroy the original structure and can improve the shear capacity of the column,and is preferred in engineering application.

Key words: reinforced concrete(RC), beam-column joints, carbon fiber reinforced polymer (CFRP), anchorage system, reliability, effectiveness