Techno Press
Techno Press

Structural Engineering and Mechanics
  Volume 4, Number 4, July 1996 , pages 365-381
DOI: https://doi.org/10.12989/sem.1996.4.4.365
 


Braced, partially braced and unbraced columns: Complete set of classical stability equations
AristizabalOchoa JD

 
Abstract
    Stability equations that evaluate the elastic critical axial load of columns in any type of construction with sidesway uninhibited, partially inhibited, and totally inhibited are derived in a classical manner. These equations can be applied to the stability of frames (unbraced, partially braced, and totally braced) with rigid, semirigid, and simple connections. The complete column classification and the corresponding three stability equations overcome the limitations and paradoxes of the well known alignment charts for braced and unbraced columns and frames. Simple criteria are presented that define the concept of partially braced columns and frames, as well as the minimum lateral bracing required by columns and frames to achieve non-sway buckling mode. Various examples are presented in detail that demonstrate the effectiveness and accuracy of the complete set of stability equations.
 
Key Words
    buckling, building codes, construction type, columns, computer applications, design, frames, loads, stability
 
Address
AristizabalOchoa JD, NATL UNIV,SCH MINES,MEDELLIN,COLOMBIA
 

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