Steel Tub Girder Code Check T [STG]

Code Parameters

Load Combination Table: The load combination table is used to map the analysis result cases and their corresponding factors to the template, along with the limit states. It serves as the basis for all finite element analysis results used in the code check equations.
Check For[StrengthServiceFatigue/Construtibility]: The code check component only allows for either a constructibility or a strength-service-fatigue limit state check in a single run. Therefore, if the user intends to perform a constructibility check, the finite element results that need to be mapped will likely differ significantly from those required for a strength-service-fatigue limit state check.
Include Haunch For Section Properties[Yes/No]: According to DOT requirements, haunch area may or may not be included in the sectional property computations. When haunch is included, it increases the inertia and section modulus and decreases the stress values, making the calculation less conservative. When the option "Include Haunch for Section Properties" is set to "No", the dimensions of the haunch are still used to determine the locations of the deck and girder sections. As a result, entering a larger haunch depth can lead to a higher section modulus, even though the option to include the haunch is set to "No".
Mlat Comp Method[FEA/AASHTO_Eqn_C4_6_1_2_4b_1/EnvelopeofFEAandAASHTOeqn]: If the user selects the FEA option, the lateral bending moments are calculated using finite element analysis. The OpenBrIM model divides the steel I-girder into three finite elements, using a beam for the top and bottom flanges and a shell for the web. This approach provides the user with a more accurate way to calculate realistic lateral bending values. However, if the user prefers to use the AASHTO equation, which converts the major axis bending moment to lateral bending, it may result in a more conservative approach. OpenBrIM provides an additional option for the user called "Envelope of FEA and AASHTO equation" which selects the larger value between the FEA and AASHTO equation results.

Fatique Parameters

ADTT: The annual daily truck traffic is a parameter used in fatigue checks.
Number of lanes available to truck: Number of lanes available to truck is a parameter used in fatigue checks.