Steel Code Check

AASHTO-LRFD02, AASHTO-LFD96, AASHTO-ADS96, AISC-LRFD2K, AISC-LRFD93, AISC-ASD89

Using the analysis results and the specified strength verification data, the member capacities of steel members are examined according to the following Steel Structures Design Criteria: AASHTO-LFRD02 (American Association of State Highway and Transportation Officials,Section 6 - Steel Structures, 2002), AASHTO-LFD96, AASHTO-ADS96, AISC-LRFD2K, AISC-LRFD93, AISC-ASD89. KSCE-ASD96 and JTJO25-86 are available upon request.

The module verifies strength of overall steel members reflecting live load reduction factors, correction factors for seismic loads and moving loads. It also reanalyzes and reevaluates strength for selected members due to varying design properties and criteria. It provides an optimal section design feature.

From the Main Menu select Design > Steel Design > Steel Code Check.

Shortcut key: [F8]

Strength verification results are produced by elements or sectional properties coupled with the maximum stress ratios (combined strength ratios) and the corresponding load combinations.

The user selects the unit system for the strength verification results.

1. AASHTO-LFRD02

Cb: Bending coefficient for bending moment about the member's strong axis

B1y, B1z: Moment magnification factors for moments about the member's strong and weak axes due to vertical load in the steel frame prevented from sidesway

B2y, B2z: Moment magnification factors for moments about the member's strong and weak axes due to horizontal load in the steel frame unprevented from sidesway

Pu: Axial force of member

Muy, Muz: Bending moments about the member's strong and weak axes respectively

phiPn: Nominal axial strength of member

phiMny, phiMnz: Nominal bending strengths about the member's strong and weak axes respectively

Common Control

 : Display the applicable code for strength verification.

Display the strength verification results for the maximum combined stress ratios (combined strength ratios) by elements or properties.

Sorting by Property displays the strength verification results of the element producing the maximum combined stress ratio (combined strength ratio) among the members of the same property.

Once Property is selected, SEL controls all the elements of the same properties.

 : Display the unit system selected by the user.

When the strength verification results that accompany the maximum combined stresses (strength) are to be produced by elements, the results are sorted by section numbers or element numbers in an ascending order. 

 : Select all the members

: Cancel the selection of all the members

Redesign the selected members.

When the redesign is executed from the results displayed by section properties all the elements attributed to the same sections are included.

Check in the option to select and highlight the selected members in Model View.

 : Display detail strength verification results

 : Display simplified strength verification results

 : Produce the strength verification results in the form of summary calculations for the selected members.

 : Produce the strength verification results in the form of detail calculations for the selected members.

 : Produce a summary list of strength verification results for the selected members.

When the results are sorted by properties, the member design results are produced for the member with the maximum combined stress (strength).

All: Produce all the strength verification results in the Checking Results dialog box

OK: From the strength verification results, display only the design results that have met the design requirements (OK) in the Checking Results dialog box

NG: From the strength verification results, display only the design results that have not satisfied the design requirements (NG) in the Checking Results dialog box

Produce strength verification results for all the load combinations for the selected members.

 : Close the dialog box

Section change

 : Propose sections satisfying the selected element conditions.

Member Name: Section name internally stored by the program

CHK: Display the strength verification results by sections

= "OK": Stress (required strength) of the section is within the allowable stress range (design strength)

= "NG": Stress (required strength) of the section exceeds the allowable stress range (design strength)

SEL: Select the sections to be changed.

LCB: Load combination number which produces the maximum combined stress ratio (combined strength ratio)

COM: Maximum Combined Stress Ratio (combined strength ratio)

SHR: Stress ratio (strength ratio) for shear force = shear stress/Allowable shear stress (Required shear strength/Design shear strength)

H: Height of the section

B: Width of the section

Area: Area of the section

 : Select the property number to be changed

 : Open an MGB file to be used as the section DB

(The MGB file containing section data saved by the user can be used ; only DB/User Section is included in the DB construction)

 : Select a DB for the change of sections

 : Select a section shape to which the section is to be changed

Specify the range of sectional dimensions within which the section is to be changed.

Select the Checkbox if the range of the section dimensions is to be partially identical to the current section in use. To specify the range, enter the dimensions corresponding to the units used in From and To.

Enter the dimensions only in the From fields when the new section is pre-defined with known dimensions.

 : Specify the range of combined stress ratios (combined strength ratios) for the section to be changed.

 : Verify strength and produce results for the section satisfying the design conditions.

 : Select the sorting preference for section strength verification results.

 : Verify the strength of the selected section, save the changed results in the steel strength verification file (.GD1) and close the dialog box.

 : Perform strength verification for the changed section and save the changed results in the steel strength verification file (.GD1).

 : Close the dialog box.

Update Changed Properties

 : Update the modeling properties with the changed sections after performing strength verification.

Properties Before Change represents the sectional properties used in the analysis.

Properties After Change represents the changed sectional properties subsequent to performing the final strength verification.

 : Auto-select only the changed properties.

 : Cancel all the selections

: Update the properties in the model with the selected sections.

 : Close the dialog box

Plot strength verification results in graphs

Plot the graphs for strength verification results by materials, sections and members.

 : Select all

 : Cancel all the selections

Select the sorting option for graphic output. (Define a table output reference for SEL selection)

Select a graphic output option. (Select Line or Vertical Bar)

Specify the load combination for graphic output (All signifies the load combination which produces the maximum ratio among all the load combinations)

 : Select a ratio type for output

 : Enter the ratio range for output

Select elements satisfying Sorting Option, Load Combinations for Steel Code Checking, Ratio and Ratio Limit in Model View.

Check in the box to produce the graph on the existing View. (If unchecked, a new View is selected)

Produce the strength verification result ratios on a graph for members satisfying the selected conditions

 : Close the dialog box