Equivalent Frame Analysis for Lateral Loads

by M. Daniel Vanderbilt, (M.ASCE), Prof. of Civ. Engrg.; Colorado State Univ., Ft Collins, Colo.,

Serial Information: Journal of the Structural Division, 1979, Vol. 105, Issue 10, Pg. 1981-1998

Document Type: Journal Paper


The equivalent frame method for analyzing reinforced concrete buildings described in the ACI Building Code Requirements (ACI 318-77) is suitable for analyzing single stories for gravity loading only. A new procedure that permits using the equivalent frame concepts for the analysis of multistory buildings for both lateral and gravity loads is described. Limited verification studies show the method predicts lateral deflections that generally agree with measured deflections. Comparisons of the new analytical procedure with conventional plane frame analyses made using effective slab widths are given. Problems and limitations in applying the method in plane frame and space frame analyses are reviewed.

Subject Headings: Lateral loads | Gravity loads | Space frames | Concrete frames | Frames | Structural analysis | Load factors | Reinforced concrete

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