Abstract
The effectiveness of FRP jackets for increasing the shear capacity and the flexural ductility of reinforced concrete (RC) columns was demonstrated in many studies. However, for smaller axial loads, the contribution of FRP jackets to flexural strength is minimal. Using FRP sheets in the direction of a column with end anchorage to improve its flexural capacity at the base is not easily achieved. This paper reports on a research project aimed at upgrading the flexural capacity of RC piers using near-surface mounted (NSM) FRP rods. Flexural strengthening and testing to failure of the piers were carried out on a bridge that was scheduled for demolition during the Spring of 1999. Three of the four piers of the bridge were strengthened with different configurations using FRP rods and jackets. The flexural strengthening was achieved using NSM carbon FRP rods that were anchored into the footings. The piers were tested under static push/pull load cycles. An analytical model was developed to determine the net forces acting on a bridge pier at a given load level based on the measured response. Strengthening techniques, test results, modes of failure, and sample analytical results of tested bridge piers are described and the effectiveness of this technology is demonstrated.
| Original language | English |
|---|---|
| Title of host publication | Structures Congress 2000: Advanced Technology in Structural Engineering |
| Volume | 103 |
| DOIs | |
| State | Published - Dec 1 2004 |
| Externally published | Yes |
| Event | Structures Congress 2000: Advanced Technology in Structural Engineering - Philadelphia, PA, United States Duration: May 8 2000 → May 10 2000 |
Other
| Other | Structures Congress 2000: Advanced Technology in Structural Engineering |
|---|---|
| Country | United States |
| City | Philadelphia, PA |
| Period | 5/8/00 → 5/10/00 |
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Keywords
- Bridge piers
- Carbon fibers
- Fiber Reinforced Polymer (FRP)
- Flexural strengthening
- Near-surface mounted (NSM) reinforcement
- Structural modeling
ASJC Scopus subject areas
- Civil and Structural Engineering
- Mechanics of Materials
- Safety, Risk, Reliability and Quality
- Building and Construction
Cite this
Flexural strengthening of bridge piers using FRP composites. / Alkhrdaji, Tarek; Nanni, Antonio.
Structures Congress 2000: Advanced Technology in Structural Engineering. Vol. 103 2004.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Flexural strengthening of bridge piers using FRP composites
AU - Alkhrdaji, Tarek
AU - Nanni, Antonio
PY - 2004/12/1
Y1 - 2004/12/1
N2 - The effectiveness of FRP jackets for increasing the shear capacity and the flexural ductility of reinforced concrete (RC) columns was demonstrated in many studies. However, for smaller axial loads, the contribution of FRP jackets to flexural strength is minimal. Using FRP sheets in the direction of a column with end anchorage to improve its flexural capacity at the base is not easily achieved. This paper reports on a research project aimed at upgrading the flexural capacity of RC piers using near-surface mounted (NSM) FRP rods. Flexural strengthening and testing to failure of the piers were carried out on a bridge that was scheduled for demolition during the Spring of 1999. Three of the four piers of the bridge were strengthened with different configurations using FRP rods and jackets. The flexural strengthening was achieved using NSM carbon FRP rods that were anchored into the footings. The piers were tested under static push/pull load cycles. An analytical model was developed to determine the net forces acting on a bridge pier at a given load level based on the measured response. Strengthening techniques, test results, modes of failure, and sample analytical results of tested bridge piers are described and the effectiveness of this technology is demonstrated.
AB - The effectiveness of FRP jackets for increasing the shear capacity and the flexural ductility of reinforced concrete (RC) columns was demonstrated in many studies. However, for smaller axial loads, the contribution of FRP jackets to flexural strength is minimal. Using FRP sheets in the direction of a column with end anchorage to improve its flexural capacity at the base is not easily achieved. This paper reports on a research project aimed at upgrading the flexural capacity of RC piers using near-surface mounted (NSM) FRP rods. Flexural strengthening and testing to failure of the piers were carried out on a bridge that was scheduled for demolition during the Spring of 1999. Three of the four piers of the bridge were strengthened with different configurations using FRP rods and jackets. The flexural strengthening was achieved using NSM carbon FRP rods that were anchored into the footings. The piers were tested under static push/pull load cycles. An analytical model was developed to determine the net forces acting on a bridge pier at a given load level based on the measured response. Strengthening techniques, test results, modes of failure, and sample analytical results of tested bridge piers are described and the effectiveness of this technology is demonstrated.
KW - Bridge piers
KW - Carbon fibers
KW - Fiber Reinforced Polymer (FRP)
KW - Flexural strengthening
KW - Near-surface mounted (NSM) reinforcement
KW - Structural modeling
UR - http://www.scopus.com/inward/record.url?scp=74949122184&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=74949122184&partnerID=8YFLogxK
U2 - 10.1061/40492(2000)174
DO - 10.1061/40492(2000)174
M3 - Conference contribution
AN - SCOPUS:74949122184
SN - 0784404925
SN - 9780784404928
VL - 103
BT - Structures Congress 2000: Advanced Technology in Structural Engineering
ER -