1 Introduction
2 Objectives
3 Geometric and Structural Properties
Set | L (m) |
N
B
|
N
L
|
W
r
|
W
Total
| d′ | d″ |
d
w
|
L
c
|
---|---|---|---|---|---|---|---|---|---|
1 | (30.5, 45.75, 61, 76.25, 91.50) | 2, 3 | 1, 2 | 9.10 | 13.00 | 0.20 | 0.15 | 0.10 | 0.61 |
2 | 2, 3, 4 | 1, 2, 3 | 14.0 | 16.70 | 0.20 | 0.15 | 0.10 | 1.20 | |
3 | 3, 4, 5, 6 | 2, 3, 4 | 17.1 | 24.00 | 0.20 | 0.15 | 0.10 | 1.45 |
4 Bridge Prototype Modeling
4.1 Field-Testing Study on Tsing Yi South Bridge
Mode number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
---|---|---|---|---|---|---|---|---|
Ashebo et al. (2007) | ||||||||
SAP2000 | 4.54 | 4.81 | 6.70 | 7.53 | 10.40 | 10.78 | 14.72 | 16.34 |
Field test | ||||||||
1st | 4.46 | * | 6.25 | 7.82 | * | 10.87 | 13.67 | 15.74 |
2nd | 4.61 | * | 6.22 | 7.73 | * | 10.81 | 13.30 | 15.74 |
3rd | 4.58 | * | 6.39 | 7.76 | * | 11.11 | 13.31 | 15.73 |
Control traffic | 4.58 | * | 6.15 | * | * | * | * | * |
CSIbridge | 4.47 | 4.88 | 6.45 | 7.62 | 10.22 | 11.07 | 14.33 | 16.03 |
4.2 Scaled Two-box Bridge Under Concentrated Loads
5 Loading Conditions
6 Live Load Distribution Factor (LDF)
7 Discussion of Results
7.1 Effect of the Number of Boxes
7.2 Effect of the Number of Lanes
7.3 Effect of Span Length
7.4 Comparison of Analytical Results with Current Specifications
8 Empirical Formulae for the Stresses and the Deflection
8.1 Positive Stress Distribution Factor
8.2 Negative (Compression) Stress Distribution Factor
8.3 Distribution Factor for Deflection
9 Verification of the Proposed Equations
Distribution factor (DF) | AVG | STD | Variance |
---|---|---|---|
Positive (tensile) stress distribution factor, Eq. (14) | 1.0530 | 0.0640 | 0.00410 |
Negative stress distribution factor, Eq. (16) | 1.0220 | 0.0610 | 0.00380 |
Deflection distribution factor, Eq. (18) | 1.0030 | 0.0710 | 0.00500 |