General

Girder: Girder for code check

Station: Station along the PGL

Code Check Template: The code check template is utilized to extract global parameters, results from finite element analysis, and limit states employed in the design process.

Panel Type [InteriorPanel/EndPanel]: The terms "end panel" and "interior panel" are used to describe the sections of a steel girder plate that are positioned at the ends and interior sections of the girder, respectively, as depicted in the accompanying figure. The interior panels comprise the remaining segments of the girder that lie between the end panels.

Type of Construction [ShoredConstruction/UnshoredConstruction]: For steel I-girder bridges, unshored construction is commonly employed. In this method, any permanent load applied before the concrete deck has hardened or become composite is assumed to be borne entirely by the steel section, while any permanent load and live load applied after this stage are assumed to be supported by the composite section. In the case of shored construction, all permanent load is assumed to be applied after the concrete deck has hardened or become composite, and this information should be clearly stated in the contract documents.

Deck Reinforcement

In the computation of the sectional properties of a composite section for negative bending regions in a steel I-girder, deck reinforcement is taken into account.

Input Data Preference [Lumped/Detailed]: When computing the sectional properties of a composite section with deck rebars in a steel I-girder, only the vertical position and area are taken into account, and there are two available data entry methods. The first method involves lumping the total rebar area within the effective width and specifying its location. Alternatively, the detailed method enables the user to input transverse and longitudinal reinforcement as well as rebar spacing, with the OpenBrIM Library component calculating the lumped reinforcement area and its location within the effective width based on user inputs.

Deck Rebar Material: Enter a single material for both top and bottom reinforcement.

If “Lumped” selected

• Lumped Top Reinforcement Area within the Effective Width:

• Dist from the CL of top bars to deck top:

• Lumped Bottom Reinforcement Area within the Effective Width

• Dist from the CL of top bars to deck bottom

If “Detailed” selected

• Long. Deck Rebar Spacing(Top Layer)

• Long. Deck Rebar Spacing(Bottom Layer)

• Long. Deck Rebar Diameter(Top Layer)

• Long. Deck Rebar Diameter(Bottom Layer)

• Trans. Deck Rebar Diameter(Top Layer)

• Trans. Deck Rebar Diameter(Bottom Layer)

• Clear Cover(Top)

• Clear Cover(Bottom)

Concrete creep adjustment factor: To incorporate the effects of concrete creep in stress calculations that involve the application of long-term loads to the composite section in regions of negative flexure, the area of the longitudinal reinforcement can be conservatively adjusted by dividing it by the "Concrete creep adjustment factor." The concrete is assumed to transfer the force from the longitudinal deck steel to the rest of the cross-section, with concrete creep acting to reduce that force over time. It is important to note that assuming a value greater than 1 is a conservative approach and is not mandated by the AASHTO LRFD BDS. As such, it is not recommended to use this assumption in normal design practice. When using the default value of 1, the reinforcement area will remain unaltered.

Has Long. Stiffener [NO/YES]: Select "Yes" if the girder code check station is located between two transverse stiffeners.

Has Trans. Stiffener [NO/YES]: Select "Yes" if there is a longitudinal stiffener that passes through the girder code check station.

Stiffener Spacing Computation [Use Cross Frame Spacing/User Input]: As shown in the figure below, each cross frame is usually connected to a connection stiffener. If no additional intermediate stiffener is present, the user may simply use the cross frame spacing as the stiffener spacing. However, if there are additional stiffeners at the code check station, the user must manually enter the transverse stiffener spacing.

Transverse Stiffener Spacing: The spacing between the transverse stiffeners, as shown in the illustration below.

Long. stiff-comp. flange: The distance from the compression flange to the longitudinal stiffener.