Concrete Girder Load Rating T [PIG]

General

Strength (Load Rating Combination): The load rating combination table serves as the basis for all finite element analysis results used in the load rating equations. It maps the analysis result cases and their corresponding factors to the template for the strength limit state.
Service (Load Rating Combination): The load rating combination table serves as the basis for all finite element analysis results used in the load rating equations. It maps the analysis result cases and their corresponding factors to the template for the service limit state.

Design Parameters

Resistance Factor for Tension-Controlled Section: By default, 0.9 is used and can be changed according to user preferences. In the screenshot below, you can see the related section of AASHTO.

Resistance Factor for Compression-Controlled Section: By default, 0.75 is used and can be changed according to user preferences. In the screenshot below, you can see the related section of AASHTO.

Resistance Factor Shear and Torsion in Section: By default, 0.9 is used and can be changed according to user preferences. In the screenshot below, you can see the related section of AASHTO.

Condition Factor [Good or Satisfactory / Fair / Poor] : The condition factor provides a reduction to account for the increased uncertainty in the resistance of deteriorated members, as outlined in the relevant specifications. Please refer to the table below for the factor values corresponding to the represented conditions. Users can specify this parameter using the available options, and the condition factor will be incorporated into the calculations accordingly.

System Factor: This parameter can be used to define the system factor of a bridge, which serves as a multiplier that accounts for the overall reliability and performance of the entire structural system.
Compression Check [0.65f’ci / 0.45f’c / 0.6f’c]:
Tensile Stress Limit:
Procedure for Shear Parameters β and θ [Simplified / General (Equation) / Appendix B5 (Table)]: The simplified method follows the AASHTO 5.7.3.4.1 standard and uses fixed values of 2.0 for β and 45 degrees for θ. Large-scale experiments (Shioya et al., 1989) have shown that using fixed values of β and θ, such as 2 and 45 degrees, can be seriously unconservative for large members without transverse reinforcement. As a result, it is important for users to exercise caution when using the general procedure. The preferred method for computing β and θ may be determined either through the general procedure or through the provisions outlined in AASHTO Appendix B5. When the user selects the general procedure, the computation follows AASHTO 5.7.3.4.2 to calculate the values of β and θ. The method outlined in Appendix B5 utilizes tabulated values of β and θ instead of using equations 5.7.3.4.2-1, 5.7.3.4.2-2, and 5.7.3.4.2-3 to compute these values.
Time-Dependent Losses Calculation Method [Approximate / Refined] :
Humidity (%) (Approximate Method): If the "Time Dependent Losses Calculation Method" parameter is defined with the option "Refined," this parameter cannot be specified and will appear as "Not Applicable (N/A)." Otherwise, humidity can be specified and will be taken into account for load rating.

Section Analysis

Include Deck Reinforcement? (No / Yes): If deck reinforcement is required for load rating, this parameter should be set to Yes. Otherwise, it should be set to No.
Ignore Rebar and Tendon in Section Property Calculation? (No / Yes): When calculating section properties such as inertia, this parameter specifies whether the properties should be calculated with or without considering the reinforcement and tendons.
Effective Width Calculation (Shear) [Use Non-Composite Section to Compute / Use Composite Section to Compute / Override with User Input]:
Section Analysis Refinement (Total Fiber Count):

Report

Support Lines Used for Span Length Calculation [All / Selection]: In some projects, the support line object can be used as an extra bearing point. In such cases, the span length calculation may not be done correctly. It is important to manually select the support lines that define the spans.
Selected Support Lines: Manual support line selection for span length calculation.