The object of the present study is a viaduct, known as "Fornello", of the Orte-Ravenna highway (E45), Italy, managed by the National Organization for Highways (ANAS). This study was developed in co-operation with ANAS, Division of Emilia-Romagna. The highway structures, built in the early seventies, present damage problems due to freeze-thaw cycles and to abundant use of salt during the winter season, together with lack of maintenance. In the Fornello viaduct particular case, the R/C slab exhibited serious structural deficiencies and, therefore, was destined to demolition and subsequent reconstruction. Cut parts of the removed slab (approximately 500 x 200 x 1700 mm3) were carried to the LAPS Laboratory of the University of Bologna, Italy, in order to assess a possible strengthening technique for repair. A number of 10 pieces of slab were considered in this study; 8 of them were subjected to concrete restoration, 6 of which were also strengthened with FRP bonded on either the original concrete (lower side of the slab) or the restored concrete (upper side of the slab). The slabs were finally all subjected to four-point bending tests up to failure.
Repair and strengthening with FRP of damaged bridge R/C slabs
APRILE, Alessandra;PELA', Luca;
2007
Abstract
The object of the present study is a viaduct, known as "Fornello", of the Orte-Ravenna highway (E45), Italy, managed by the National Organization for Highways (ANAS). This study was developed in co-operation with ANAS, Division of Emilia-Romagna. The highway structures, built in the early seventies, present damage problems due to freeze-thaw cycles and to abundant use of salt during the winter season, together with lack of maintenance. In the Fornello viaduct particular case, the R/C slab exhibited serious structural deficiencies and, therefore, was destined to demolition and subsequent reconstruction. Cut parts of the removed slab (approximately 500 x 200 x 1700 mm3) were carried to the LAPS Laboratory of the University of Bologna, Italy, in order to assess a possible strengthening technique for repair. A number of 10 pieces of slab were considered in this study; 8 of them were subjected to concrete restoration, 6 of which were also strengthened with FRP bonded on either the original concrete (lower side of the slab) or the restored concrete (upper side of the slab). The slabs were finally all subjected to four-point bending tests up to failure.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
