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THEORETICAL DISCUSSION. In 1833 Clapeyron stated his law of general work: “For any frame of constant temperature and acted on by loads which are gradually applied, the actual work produced during deformation is independent of the manner in which these loads are created and is always half as great as ths work otherwise produced by forces retaining their full end values during the entire act of deformation.” H.W. Coultas
In contrast to driving bearing piles for which the direct resistance below the point often becomes greater than the frictional value that the sides can afford, sheet steel piles encounter the greater proportion of their resistance through friction between the ground and their side surface which is very considerable compared with the sectional area of the solid steel pile which can, however, transmit a very high driving force without becoming deformed. A. Hiley
The authors have presented an interesting method for the rapid estimation of maximum bending moments in decks of suspension bridges. Their approximate analysis draws to a logical conclusion the more general method described by Bowen and Charlton (reference 3 of the paper). It is clear that the use of symmetry and antisymmetry offers a considerable computational advantage :two sets of three linear simultaneous equations are solved far more quickly than one set of six. F. Van der Woude, M.S. Gregory and H.I.A. Hegab