A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Experimental investigation of seismic repair and retrofit of bridge columns by composite jackets
This paper summarizes the results of comprehensive experimental studies on half-scale bridge columns repaired and retrofitted with composite-material jackets. The experimental program was composed of two interrelated subprograms. Initially, a total of fourteen half-scale squat circular and rectangular reinforced concrete columns were tested under fully reversed cyclic shear in a double bending configuration. In order to provide a basis for comparison, a total of three as-built columns were tested. Another ten column samples were tested after being retrofitted with different composite-jacket systems. One circular as-built column was repaired after failure. The repair process involved both crack injection, as well as addition of carbon/epoxy composite jacket. The repaired column was then retested and evaluated. Experimental results showed that all as-built columns developed an unstable behavior and failed in brittle shear mode. The common failure mode for all retrofitted samples was due to flexure with significant improvement in the column ductility. The repaired column demostrated ductility enhancement over the as-built sample. In the second subprogram, a total of thirteen half-scale circular and square column models were constructed with short lap-splice details at the base, and were tested in flexure under lateral cyclic loading. Three as-built columns were tested and a total of ten columns were tested after being retrofitted with different composite-jacket systems. In general, the common mode of failure for the as-built samples was a brittle failure due to bond deterioration of the lap-spliced longitudinal reinforcement. The jacketed circular columns demonstrated a significant improvement in their cyclic performance . However, tests conducted on square jacketed columns showed a very limited improvement in clamping on the lap splice region and for enhancing the ductility of the column.
Experimental investigation of seismic repair and retrofit of bridge columns by composite jackets
This paper summarizes the results of comprehensive experimental studies on half-scale bridge columns repaired and retrofitted with composite-material jackets. The experimental program was composed of two interrelated subprograms. Initially, a total of fourteen half-scale squat circular and rectangular reinforced concrete columns were tested under fully reversed cyclic shear in a double bending configuration. In order to provide a basis for comparison, a total of three as-built columns were tested. Another ten column samples were tested after being retrofitted with different composite-jacket systems. One circular as-built column was repaired after failure. The repair process involved both crack injection, as well as addition of carbon/epoxy composite jacket. The repaired column was then retested and evaluated. Experimental results showed that all as-built columns developed an unstable behavior and failed in brittle shear mode. The common failure mode for all retrofitted samples was due to flexure with significant improvement in the column ductility. The repaired column demostrated ductility enhancement over the as-built sample. In the second subprogram, a total of thirteen half-scale circular and square column models were constructed with short lap-splice details at the base, and were tested in flexure under lateral cyclic loading. Three as-built columns were tested and a total of ten columns were tested after being retrofitted with different composite-jacket systems. In general, the common mode of failure for the as-built samples was a brittle failure due to bond deterioration of the lap-spliced longitudinal reinforcement. The jacketed circular columns demonstrated a significant improvement in their cyclic performance . However, tests conducted on square jacketed columns showed a very limited improvement in clamping on the lap splice region and for enhancing the ductility of the column.
Experimental investigation of seismic repair and retrofit of bridge columns by composite jackets
Experimentelle Untersuchung der erdbebensicheren Reparatur und Ausrüstung von Brückenpfeilern mit Umhüllungen aus Verbundwerkstoffen
Haroun, M.A. (author) / Mosallam, A.S. (author) / Feng, M.Q. (author) / Elsanadedy, H.M. (author)
Journal of Reinforced Plastics and Composites ; 22 ; 1243-1268
2003
26 Seiten, 30 Bilder, 4 Tabellen, 6 Quellen
Article (Journal)
English
Brücke (Bauwerk) , Pfeiler , Stahlbeton , Reparatur , erdbebensicheres Bauwerk , Ausrüstungsoptimierung , Umhüllung , carbonfaserverstärkter Kunststoff , Epoxidharz , experimentelle Untersuchung , zyklische Prüfung , Scherstabilität , Verbesserung , Überlappstoß , Versagensart , Verbundwerkstoffmechanik , Säule , Duktilität
Experimental Investigation of Seismic Repair and Retrofit of Bridge Columns by Composite Jackets
| British Library Online Contents | 2003
Experimental Investigation of Seismic Repair and Retrofit of Bridge Columns by Composite Jackets
| British Library Conference Proceedings | 2001
Composite Jackets for the Seismic Retrofit and Repair of Bridge Columns
| British Library Conference Proceedings | 2002
Seismic Retrofit of Bridge Columns with CFRP Jackets
| British Library Conference Proceedings | 2001
| British Library Conference Proceedings | 1999