DESIGN OF SLENDER CONCRETE COLUMNS - REVISITED

Revisions are proposed to Sections 10.10 and 10.11 of the ACI Building Code to simplify the design of slender columns and to recognize the u se of second-order analyses. These changes are undergoing letter ballo t in ACI Committee 318 and if accepted will appear in the 1995 ACI Cod e. Major changes include the listing of a series of El values for use in second-order frame analyses, a test for sway and nonsway frames, a flat psi value for stability calculations, new slenderness limits, and the method of combining and magnifying the nonsway and sway moments.