抄録
While the use of plate bonding method to repair or strengthen steel structures started to be accepted, the influence of temperature state of steel members on the reinforcing effect of plate bonding method and endurance of bonding are concerned. In this research, steel and CFRP plates are bonded on to the lower surface of bottom flange in main girder and onto the lower surface of orthotropic steel deck plate in service, and strains on the patch plates during the adhesive curing and applying the traffic loading were measured. As a result, it was found that the adhesive layer were completely cured under the service. Furthermore, it could be observed that the strain transfer ratio in the case of bonded patch plates on the bottom flange was constant through the season, while the strain transfer ratio in the case of bonded patch plates on the deck plate was depended on the season.
