Behavior of Multi-Outrigger Braced Tall Building Structures


  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal


Title: Behavior of Multi-Outrigger Braced Tall Building Structures

Author(s): B. Stafford Smith and I. 0. Nwaka

Publication: Special Publication

Volume: 63


Appears on pages(s): 515-542

Keywords: bending moments; bracing; columns (supports) ; high-rise buildings; lateral pressure; loads (forces); mathematical models; structural analysis

Date: 8/1/1980

A study is made of the forces and displacements in multi-outrigger tall building structures. Simplified general equations are developed for the restraining moment of the out-riggers, the reduction in drift and the optimum location of the outriggers for maximum drift reduction. The efficiencies of various optimum and evenly spaced outrigger systems are presented. The assumptions used make the method of analysis suitable only for preliminary design guidance; however, some valuable general conclusions relating to the number and location of outriggers are drawn.