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This paper presents a method for the analysis of rectangular hyperbolic paraboloid shells with any combination of fixed and simply supported edges. The method consists of expressing the displacement functions as double series in characteristic functions
satisfying the boundary conditions exactly. The differential equations are satisfied using the orthogonality property of these functions. This results in three infinite sets of simultaneous equations, the solution of which gives the undetermined parameters. The convergence of the deflection, membrane forces and moments have been studied and they are compared with other published results.
K.T. Sundara Raja Iyengar and R.S. Srinivasan
Formulation of Organic Coatings, by N. I. Gaynes, G. N. Danziger and F. C. Kinsler
(Princeton, New Jersey, USA and London: D. Van Nostrand, 1967) 9 1/4 x 6 in., 386 + xii pp., £5 7s 6d.
Mr. William G. Baird writes :
' Professor Sawko has presented a paper which will be of interest to all engineers who seek a quick and simple solution to the complex problem of analysing the loads and moments carried by a group of piles. However, some doubt exists as to the reliability of the method when it is applied to physical problems. '