A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Parametric Effects on Evaluation of an Impact-Damaged Prestressed Concrete Bridge Girder Repaired by Externally Bonded Carbon-Fiber-Reinforced Polymer Sheets
AbstractThis paper investigates the evaluation procedure of an AASHTO Type 3 precast-prestressed girder that was extensively damaged by truck impact and then repaired using externally bonded fiber-reinforced polymer (FRP) composites. Results of this study can be applied to bridges having similar vehicle impact incidents. Parameters whose effects were investigated on the evaluation procedure include (1) the effect of horizontal resistance of elastomeric bearing supports, (2) the presence of barrier wall and sidewalk, and (3) live load distribution factors obtained from finite-element analysis (FEA) compared with the simplified method prescribed by other codes. FEA showed that support horizontal resistance has negligible effects on live load distribution factors for shear, Fv, while it has considerable effect on live load distribution factors for moment, Fm. The live load distribution factors Fm and Fv calculated from the simplified method of analysis prescribed by other codes were observed to all be greater than those obtained from FEA, showing that the approach taken by other codes is conservative for the studied bridge. The Fm and Fv of external girders obtained by FEA were as much as 30 and 40% less than those of other codes. Inclusion of barrier wall and sidewalk in the analysis showed an additional 18% reduction for Fm, with insignificant effect on Fv. The live load capacity factor as the safety indicator in the bridge evaluation was calculated analytically by the load and resistance factor method and the mean load method and then correlated with experimental findings of proof load test on the repaired girder.
Parametric Effects on Evaluation of an Impact-Damaged Prestressed Concrete Bridge Girder Repaired by Externally Bonded Carbon-Fiber-Reinforced Polymer Sheets
AbstractThis paper investigates the evaluation procedure of an AASHTO Type 3 precast-prestressed girder that was extensively damaged by truck impact and then repaired using externally bonded fiber-reinforced polymer (FRP) composites. Results of this study can be applied to bridges having similar vehicle impact incidents. Parameters whose effects were investigated on the evaluation procedure include (1) the effect of horizontal resistance of elastomeric bearing supports, (2) the presence of barrier wall and sidewalk, and (3) live load distribution factors obtained from finite-element analysis (FEA) compared with the simplified method prescribed by other codes. FEA showed that support horizontal resistance has negligible effects on live load distribution factors for shear, Fv, while it has considerable effect on live load distribution factors for moment, Fm. The live load distribution factors Fm and Fv calculated from the simplified method of analysis prescribed by other codes were observed to all be greater than those obtained from FEA, showing that the approach taken by other codes is conservative for the studied bridge. The Fm and Fv of external girders obtained by FEA were as much as 30 and 40% less than those of other codes. Inclusion of barrier wall and sidewalk in the analysis showed an additional 18% reduction for Fm, with insignificant effect on Fv. The live load capacity factor as the safety indicator in the bridge evaluation was calculated analytically by the load and resistance factor method and the mean load method and then correlated with experimental findings of proof load test on the repaired girder.
Parametric Effects on Evaluation of an Impact-Damaged Prestressed Concrete Bridge Girder Repaired by Externally Bonded Carbon-Fiber-Reinforced Polymer Sheets
Azimi, Hossein (author) / Sennah, Khaled
2015
Article (Journal)
English
| British Library Online Contents | 2015
| British Library Online Contents | 2008