Abstract
Increase in traffic volume and load on highway bridges requires replacement of the bridge superstructure or adoption of a structural strengthening system. Strengthening of existing prestressed concrete bridges with conventional construction materials results in an increase in dead load. In addition, it may also result in decrease in bridge clearance. The use of Carbon fiber reinforced polymer (CFRP) composites is considered a practical alternative for flexural strengthening of prestressed concrete bridge girders. However, the effectiveness of the CFRP depends on several factors, which have not been quantified well. AASHTO type II prestressed girder is one of the most popular girders carrying highway bridge decks, in the U.S.A. This paper presents a finite element analysis of CFRP strengthened AASHTO type II prestressed girder. Several variables were investigated: concrete strength, ratio of prestressing strands, and ratio of CFRP composites. For CFRP strengthened PC girders, the results of this investigation suggest that for the same amount of CFRP, the lower the ratio of prestressing strands, the higher the percentage increase in flexural strength. In addition, strengthened girders exhibit comparable ductility as un-strengthened PC girders.
| Original language | English (US) |
|---|---|
| Title of host publication | Proceedings of the 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016 |
| Publisher | Department of Civil and Environmental Engineering and Research Institute for Sustainable Urban Development, The Hong Kong Polytechnic University |
| Pages | 307-312 |
| Number of pages | 6 |
| ISBN (Electronic) | 9789881448026 |
| State | Published - Jan 1 2016 |
| Event | 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016 - Hong Kong, China Duration: Dec 14 2016 → Dec 16 2016 |
Other
| Other | 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016 |
|---|---|
| Country | China |
| City | Hong Kong |
| Period | 12/14/16 → 12/16/16 |
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Keywords
- CFRP composites
- Finite element analysis
- Flexural strength
- Highway bridges
- Prestressed girders
ASJC Scopus subject areas
- Civil and Structural Engineering
- Polymers and Plastics
Cite this
Strength and ductility of CFRP strengthened highway PC girders : An fem investigation. / Bai, T.; Yan, B.; Ataei, H.; Aboutaha, Riyad S.
Proceedings of the 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016. Department of Civil and Environmental Engineering and Research Institute for Sustainable Urban Development, The Hong Kong Polytechnic University, 2016. p. 307-312.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Strength and ductility of CFRP strengthened highway PC girders
T2 - An fem investigation
AU - Bai, T.
AU - Yan, B.
AU - Ataei, H.
AU - Aboutaha, Riyad S
PY - 2016/1/1
Y1 - 2016/1/1
N2 - Increase in traffic volume and load on highway bridges requires replacement of the bridge superstructure or adoption of a structural strengthening system. Strengthening of existing prestressed concrete bridges with conventional construction materials results in an increase in dead load. In addition, it may also result in decrease in bridge clearance. The use of Carbon fiber reinforced polymer (CFRP) composites is considered a practical alternative for flexural strengthening of prestressed concrete bridge girders. However, the effectiveness of the CFRP depends on several factors, which have not been quantified well. AASHTO type II prestressed girder is one of the most popular girders carrying highway bridge decks, in the U.S.A. This paper presents a finite element analysis of CFRP strengthened AASHTO type II prestressed girder. Several variables were investigated: concrete strength, ratio of prestressing strands, and ratio of CFRP composites. For CFRP strengthened PC girders, the results of this investigation suggest that for the same amount of CFRP, the lower the ratio of prestressing strands, the higher the percentage increase in flexural strength. In addition, strengthened girders exhibit comparable ductility as un-strengthened PC girders.
AB - Increase in traffic volume and load on highway bridges requires replacement of the bridge superstructure or adoption of a structural strengthening system. Strengthening of existing prestressed concrete bridges with conventional construction materials results in an increase in dead load. In addition, it may also result in decrease in bridge clearance. The use of Carbon fiber reinforced polymer (CFRP) composites is considered a practical alternative for flexural strengthening of prestressed concrete bridge girders. However, the effectiveness of the CFRP depends on several factors, which have not been quantified well. AASHTO type II prestressed girder is one of the most popular girders carrying highway bridge decks, in the U.S.A. This paper presents a finite element analysis of CFRP strengthened AASHTO type II prestressed girder. Several variables were investigated: concrete strength, ratio of prestressing strands, and ratio of CFRP composites. For CFRP strengthened PC girders, the results of this investigation suggest that for the same amount of CFRP, the lower the ratio of prestressing strands, the higher the percentage increase in flexural strength. In addition, strengthened girders exhibit comparable ductility as un-strengthened PC girders.
KW - CFRP composites
KW - Finite element analysis
KW - Flexural strength
KW - Highway bridges
KW - Prestressed girders
UR - http://www.scopus.com/inward/record.url?scp=85049883143&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85049883143&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85049883143
SP - 307
EP - 312
BT - Proceedings of the 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016
PB - Department of Civil and Environmental Engineering and Research Institute for Sustainable Urban Development, The Hong Kong Polytechnic University
ER -