Transcription of CHAPTER 3. COMPRESSION MEMBER DESIGN 3.1 …
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CHAPTER 3. COMPRESSION MEMBER DESIGN 3.1 …
CE 405: DESIGN of Steel Structures Prof. Dr. A. Varma CHAPTER 3. COMPRESSION MEMBER DESIGN INTRODUCTORY CONCEPTS COMPRESSION Members: Structural elements that are subjected to axial compressive forces only are called columns. Columns are subjected to axial loads thru the centroid. Stress: The stress in the column cross-section can be calculated as AP=f ( ) where, f is assumed to be uniform over the entire cross-section. This ideal state is never reached. The stress-state will be non-uniform due to: - Accidental eccentricity of loading with respect to the centroid - MEMBER out-of straightness (crookedness), or - Residual stresses in the MEMBER cross-section due to fabrication processes.
CE 405: Design of Steel Structures – Prof. Dr. A. Varma - If λc is less than or equal to 1.5, inelastic buckling occurs and use Equation (3.3) • Note that the column can develop its yield strength Fy as λc approaches zero. • • 3.5 COLUMN STRENGTH In order to simplify calculations, the AISC specification includes Tables.
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