LRFD Analysis Verification - Straight Steel I Girder Bridge

Example 2 consists of a two-span continuous plate girder analysis example using US units. The spans are identical, each with a length of 190' and four different cross-section types. The plate girder is an interior beam having a Penn DOT skew angle of 30°, The example assumes composite construction with three deck pouringstages and checks fatigue stresses in the reinforcing steel. A PHL-93 live loading is assumed with high average daily truck traffic. Flexure and shear rating factors are also computed for this problem.


Results


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BEAM WEIGHT ANALYSIS 
Reactions(kips)

Girder 5


Larsa ResultSTLFRD ResultOpenBrim Result
Pier 124.7024.66

24.7020

Pier 299.1699.1799.1535
Pier 324.7024.6624.7020
Total148.56148.49148.5575






PERMANENT INPUTTED DC1 ANALYSIS 
Reactions(kips)

Girder 5


Larsa ResultSTLFRD ResultOpenBrim Result
Pier 18.788.77

8.7768

Pier 231.8531.8631.7768
Pier 38.788.778.7768
Total49.4049.4049.3999












SLAB AND HAUNCH WEIGHT ANALYSIS 
Reactions(kips)

Girder 5


Larsa ResultSTLFRD ResultOpenBrim Result
Pier 164.964.9

64.963

Pier 2240.23240.32240.254
Pier 365.0364.964.963
Total370.15370.12370.18


TOTAL DC1 ANALYSIS 
Reactions(kips)

Girder 5


Larsa ResultSTLFRD ResultOpenBrim Result
Pier 198.3798.33

98.4418

Pier 2371.23371.35371.2538
Pier 398.598.3398.4418
Total568.11568.01568.1374


PERMANENT INPUTTED DC2 ANALYSIS (COMPOSITE)
Reactions(kips)

Girder 5


Larsa ResultSTLFRD ResultOpenBrim Result
Pier 111.5911.64

11.7499

Pier 240.4640.5640.3555
Pier 311.6311.6411.7471
Total63.6963.8463.8525







FUTURE WEARING SURFACE ANALYSIS (COMPOSITE)
Reactions(kips)

Girder 5


Larsa ResultSTLFRD ResultOpenBrim Result
Pier 115.0715.11

15.2468

Pier 252.652.6352.3661
Pier 315.1215.1115.2432
Total82.8082.8582.8561









DECK POUR 1 ANALYSIS
Reactions(kips)

Girder 5


Larsa ResultSTLFRD ResultOpenBrim Result
Pier 115.7415.75

15.7915

Pier 2103.57103.61103.5569
Pier 315.8315.7515.7915
Total135.14135.11135.1399


DECK POUR 2 ANALYSIS
Reactions(kips)

Girder 5


Larsa ResultSTLFRD ResultOpenBrim Result
Pier 147.9748.71

47.9585

Pier 238.6137.1138.6231
Pier 347.9748.7147.9585
Total134.54134.53134.5401


DECK POUR 3 ANALYSIS
Reactions(kips)

Girder 5


Larsa ResultSTLFRD ResultOpenBrim Result
Pier 11.191.631.213
Pier 298.0597.2298.074
Pier 31.231.631.213
Total100.47100.48100.50