Beam Column - General (Gittleman Method)

Analyzes beam-columns subjected to combined axial compression and lateral loading using the Gittleman Method. This tool handles columns composed of multiple segments, where each segment has constant properties (E, I) but different segments may have different properties. The analysis includes multiple concentrated and distributed lateral loads, applied end moments, and initial eccentricity, accounting for axial load magnification effects on bending moments through second-order P-δ analysis.

  • Multiple column segments, each with constant cross-section (E, I, length) but varying between segments

  • Combined axial compression at ends (PA, PB) with intermediate axial loads along the column

  • Multiple lateral point loads, distributed loads, and concentrated moments applied at segment boundaries

  • Applied end moments (MA, MB) and initial eccentricity effects

  • Second-order analysis including P-δ effects and axial load magnification

Note: The Gittleman Method uses a transfer matrix approach to solve the differential equations for laterally loaded columns under axial compression. Each segment must have constant properties (E, I) throughout its length, but properties can change between segments. Input column segments from end A to end B, with loads and properties defined at each segment boundary. Manufacturing tolerances (such as L/400 initial eccentricity) should be included in the analysis.

General Beam-Column Properties and Loading Input

Unit System: /

General Beam-Column

General Beam-Column Loading

End Loads






Load Case (optional)


Column Properties and Loads
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References

Gittleman, W . "Laterally Loaded Non-Uniform Struts", Aircraft Engineering, Feb. 1953, p. 56.

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