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LRFD Steel Design AASHTO LRFD Bridge Design Specifications Slide Shows

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Abstract
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This document focuses on the design specifications for LRFD steel bridges according to AASHTO standards, emphasizing the considerations for both redundant and non-redundant structural components. It discusses various factors that influence the design and economy of steel bridges, including girder spacing, span arrangements, and material selection, while providing insights into reducing life-cycle costs through effective planning and construction methods.

Figures (499)
Detour length applies to the shortest, emergency detour route.
Detour length applies to the shortest, emergency detour route.
No multiple presence factors are used in the Fatigue Loading, the distribution factors are based on one lane loaded, and load modifiers (ny) are taken as 1.00.
No multiple presence factors are used in the Fatigue Loading, the distribution factors are based on one lane loaded, and load modifiers (ny) are taken as 1.00.
ODOT Exception: For interior beam DF, include monolithic wearing surface and haunch in e, and K, when this increases the DF.
ODOT Exception: For interior beam DF, include monolithic wearing surface and haunch in e, and K, when this increases the DF.
More about fatigue categories in a minute...
More about fatigue categories in a minute...
Table 6.6.2-2 Fracture Toughness Requirements
Table 6.6.2-2 Fracture Toughness Requirements
Table 6.6.2-2 Fracture Toughness Requirements
Table 6.6.2-2 Fracture Toughness Requirements
Yielding of the member in the gross section is considered a limit state because it could lead to excessive elongation of the member that could compromise the stability or safety of the structure.
Yielding of the member in the gross section is considered a limit state because it could lead to excessive elongation of the member that could compromise the stability or safety of the structure.
The AISC provisions are now found in Article D3.3 of the 2005 13% Ed.
The AISC provisions are now found in Article D3.3 of the 2005 13% Ed.
A section is a “Plate Girder” only when it has a slender web.
A section is a “Plate Girder” only when it has a slender web.
ODOT: Don’t include the sacrificial wearing surface or the haunch ii when computing composite section properties.
ODOT: Don’t include the sacrificial wearing surface or the haunch ii when computing composite section properties.
For curved bridges, P must include radial forces as wel
For curved bridges, P must include radial forces as wel

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