The Structural Engineer > Archive > Volume 57 (1979) > Issues > Issue 13 > Design of Multistorey Frames to Sway Deflection Limitations
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Design of Multistorey Frames to Sway Deflection Limitations

A method is presented for the minimum cost design of multistorey rectangular steel frames to limiting values of horizontal sway deflection. The frame is rendered statically determinate by assuming points of contraflexure. Realistic expressions for steelwork cost are obtained in terms of the moments of inertia of the members. These expressions are used, together with slopedeflection analysis, to derive equations for design. The equations are suitable for hand calculations, and their accuracy is found to be good by comparison with computer analysis. Account can be taken of restrictions on section size and change of section, and of the lack of a continuous range of rolled sections. D. Anderson and M.A. Islam