Folded Plates with Intermediate Flexible Supports

by Abubakr A. Wahab, Post-Doctoral Research Assoc.; Northwestern Univ., Evanston, Ill.; on leave from Univ. of Khartoum, Khartoum, Sudan,
Adam M. Mousa, Dir.; Sibdo Engrg. Consultancy, Khartoum, Sudan,

Serial Information: Journal of the Structural Division, 1979, Vol. 105, Issue 10, Pg. 2091-2109

Document Type: Journal Paper


In the suggested approach the intensity of the reactions on intermediate supports is approximated by uniform step functions in the normal and transverse directions and expanded into double Fourier Series. Correct values of these reactions are determined by satisfying compatibility conditions at the center of each step reaction between the plate structure and flexible frames. Two examples were solved to illustrate the procedure of analysis and to facilitate comparison with folded-plate theory and with experimental analysis. Results indicate that stress resultants in the longitudinal direction are substantially affected by the stiffness of the middle supports while those in the transverse direction remain with little change. The results given by the proposed method accord reasonably well those calculated by the folded-plate theory and with the experimental results.

Subject Headings: Folded plates | Fourier analysis | High-rise buildings | Frames | Comparative studies | Stiffening

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