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Steel and Composite Structures   Volume 1, Number 2, June 2001, pages 213-230
Practical design guidlines for semi-continuous composite braced fremes
J.Y. Richard Liew, K.L Looi(Singapore) and Brian Uy(Australia)

Abstract     [Buy Article]
    This paper presents a simplified approach for the design of semi-continuous composite beamsrnin braced frames, where specific attention is given to the effect of joint rotational stiffness. A simplerncomposite beam model is proposed incorporating the effects of semi-rigid end connections and the nonprismaticrnproperties of a ?racked?steel-concrete beam. This beam model is extended to a sub-frame inrnwhich the restraining effects from the adjoining members are considered. Parametric studies are performedrnon several sub-frame models and the results are used to show that it is possible to correlate the amount ofrnmoment redistribution of semi-continuous beam within the sub-frame using an equivalent stiffness of thernconnection. Deflection equations are derived for semi-continuous composite beams subjected to variousrnloading and parametric studies on beam vibrations are conducted. The proposed method may be appliedrnusing a simple computer or spreadsheet program.
Key Words
    semi-rigid connections; connection stiffness; moment capacity; sub-frame analysis; plastic hinge; non-prismatic; composite beam; moment redistribution.
J.Y. Richard Liew?and K.L. Looi, Department of Civil Engineering, National University of Singapore, Blk E1A, #07-03, 1 Engineering Drive 2, Singapore 117576rnBrian Uy, School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW, 2052, Australia

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