Abstract
Traffic vibration of highway bridges often leads to fatigue cracking at the bases of tubular columns with signboards. This paper deals with the application of carbon fiber sheets and non-shrinkable mortar to improve the fatigue life at the tubular column bases. Fatigue experiments are completed on the tubular column bases with CF sheets and/or NS mortar provided. It is shown that CF sheets improve the life when cracks propagate under CF sheets, while NS mortar increases the life until cracks reach CF sheets.
