1 Introduction
2 Background
2.1 Bridge Deck Description
2.2 Problem Statement
3 Experimental Program
Test specimen | Edge tendon type | Concrete type |
---|---|---|
ST-NC | Steel | Normal |
ST-FRC | Steel | FRC |
ECT-NC | Epoxy-coated steel | Normal |
ECT-FRC | Epoxy-coated steel | FRC |
CFRP-NC | CFRP | Normal |
CFRP-FRC | CFRP | FRC |
Concrete compressive strength | Concrete tensile strength | Concrete modulus of rupture | Tendon f
y
| Tendon f
u
| ||||
---|---|---|---|---|---|---|---|---|
ST | Epoxy-coated steel | ST | Epoxy-coated steel | CFRP | ||||
ST-NC | 37.2/6,360 | 3.36 | 31,342/600 | 1,737/2.52 × 105 | – | 1,889/2.74 × 105 | – | – |
ST-FRC | 32.6/5,580 | 3.08 | 29,357/855 | 1,737/2.52 × 105 | – | 1,889/2.74 × 105 | – | – |
ECT-NC | 34.5/5,900 | 3.20 | 30,187/765 | 1,793/2.6 × 105 | 1,882/2.73 × 105 | 1,924/2.79 × 105 | 1,999/2.9 × 105 | – |
ECT-FRC | 37.8/6,460 | 3.40 | 31,587/745 | 1,793/2.6 × 105 | 1,882/2.73 × 105 | 1,924/2.79 × 105 | 1,999/2.9 × 105 | – |
CFRP-NC | 40.9/700 | 3.58 | 32,881/620 | 1,793/2.6 × 105 | – | 1,924/2.79 × 105 | – | 2,576.5 |
CFRP-FRC | 37.4/6,390 | 3.37 | 31,416/585 | 1,793/2.6 × 105 | – | 1,924/2.79 × 105 | – | 2,576.5 |
4 Modeling Approach
4.1 Material Models
4.1.1 Concrete Constitutive Model and Damage Indices
4.1.2 Other Data of Concrete Models
4.1.3 Prestressing Tendons
4.2 Finite Element Model Description
4.2.1 Symmetry
4.2.2 Element Type and Meshing Scheme
4.2.3 Bonding Between Reinforcement and Concrete
4.2.4 Boundary Conditions
4.2.5 Prestressing Effect
4.2.6 Convergence Considerations
5 Validation of FE Model
5.1 Force–Displacement Relationships
Failure load | Midspan displacement at failure load | |||||
---|---|---|---|---|---|---|
P
Test
(kN) | P
FE
(kN) | P
Test
/P
FE
| δTest (mm) | δFE (mm) | δTest/δFE | |
ST-NC | 98.21 | 101.4216 | 0.97 | 54.31 | 51.82 | 1.05 |
ST-FRC | 90.55 | 88.1972 | 1.03 | 42.75 | 34.8868 | 1.23 |
94.4248a | 0.96a | 42.5018a | 1.01a | |||
ECT-NC | 82.51 | 88.3596 | 0.93 | 27.46 | 34.8623 | 0.79 |
85.5892a | 0.96a | 29.4543a | 0.93a | |||
ECT-FRC | 94.36 | 93.43 | 1.01 | 44.02 | 41.05 | 1.07 |
CFRP-NC | 93.39 | 99.5872 | 0.94 | 36.45 | 45 | 0.81 |
91.4712a | 1.02a | 33.4368a | 1.09a | |||
CFRP-FRC | 92.85 | 97.0472 | 0.96 | 44.11 | 40.00 | 1.10 |