Attention is focused on the effective length of compression members in double-layer grids. An attempt to account for the end fixity resulting from various types of employed jointing systems and the effect of other members meeting at the same joint is made. A theoretical model for calculating the effective length is presented and is applied to a wide-range of cases. The goal is to suggest using this model for assessing the effective length of compression members in double-layer grids and to make recommendations for various effective length factors for a wide range of practical cases which would then increase the efficiency of designs that are presently based on conservative estimates.
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References
1.
LeeH.G. and MakowskiZ.S., “Study of Factors Affecting Stress Distribution in Double-Layer Grids of the Square-and-Diagnonal Type”, Architectural Science Review, 20, No. 4, December1977, pp 90-102.
2.
ButterworthJ.W., “Analysis of Double-Layer Grids”, Course on Analysis, Design and Construction of Double-Layer Grids, University of Surrey. Vol.1, 1978. pp 53-80.
3.
GoelS.C. and El-TayemA.A., “Cyclic Load Behavior of Angle X-Bracing”, Journal of the Structural Division, ASCE, 112, No.11, November, 1986.
4.
JainA.K.GoelS.C. and HansonR.D., “Hysteresis Cycles of Axially Loaded Steel Members”, Journal of Structural Divison, ASCE, 106, No.ST8. August, 1980.
5.
Various Examples of Existing Double-Layer Grid Structures.
6.
Specifications for the Use of Structural Steel in Buildings, BS 449: Part 2, 1969. British Standards Institute.
