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Analysis of steel beams subject to concentrated loads Design Excel Sheet

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This is a spreadsheet program written in MS-Excel for the purpose of analysis of steel beams subject to concentrated loads. Specifically, web yielding, web crippling, and web buckling criteria are checked to determine if web stiffeners are required to resist the concentrated load. If stiffeners are required, the stiffener size and weld requirements are determined.

This program is a workbook consisting of three (3) worksheets, described as follows:

  • Doc – Documentation sheet
  • Beam Stiffeners – Steel beam web stiffener analysis for concentrated loads
  • Beam Stiffeners (Table) – Steel beam web stiffener analysis for concentrated loads (table version)

All the worksheets are independent and self contained, so that you can move them from one workbook to another. All the worksheets are protected, but not with a password.

Program Assumptions and Limitations:
1. This program follows the procedures and guidelines of the AISC 9th Edition Allowable Stress (ASD) Manual for wide flange beams subjected to concentrated compressive loads per Chapter K, pages 5-80 to 5-83.

2. This program uses the database of member dimensions and section properties from the “AISC Shapes Database”, Version 3.0 (2001) as well as the AISC 9th Edition (ASD) Manual (1989).

3. For the purpose of determining the total composite section to be considered for resisting the compressive load, the program assumes a spacing of 3″ center-to-center between the stiffener pairs. Thus the total effective strips of web to be included in the composite section along with the stiffeners are as follows:

For interior condition (P or R > d/2):
1-pair:25*tw
2-pairs: 25*tw+3″
3-pairs: 25*tw+6″

For end condition (P or R <= d/2):
1-pair:12*tw
2-pairs: 12*tw+3″
3-pairs: 12*tw+6″

4. This program contains numerous “comment boxes” which contain a wide variety of information including explanations of input or output items, equations used, data tables, etc. (Note: presence of a “comment box” is denoted by a “red triangle” in the upper right-hand corner of a cell. Merely move the mouse pointer to the desired cell to view the contents of that particular “comment box”.)

Calculation Reference
AISC

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