Synopses & Reviews
Synopsis
Excerpt from Elements of Graphical Statics and Their Application to Framed Structures Framed
When engineers shall have become convinced Of the fact that there is in the continuous girder a theoretical saving of mate rial amounting usually to from 25 to 30 per cent. Per truss, and in the extreme case even reaching as high as 50 per cent, as compared with the simple girder; and that the main objection which can be urged - viz., the influence of small variations in level Of the supports - has, when properly considered, no force whatever, we shall probably hear less Often of designs contem plating many successive and independent spans of considerable length - such as, for instance, for a bridge over the Hudson at Poughkeepsie, consisting Of five separate spans Of 525 ft. Each.
The present work contains the only complete graphical an d analytical presentation of this subject in English professional literature, and should it succeed in directing more general attention to what has been done, will not have been in vain. Almost the whole of Chap. XIII. Is entirely new and consti tutss an important advance in the treatment Of the subject. Those acquainted with the Old method will, we think, be pleased with the simplicity and comprehensiveness of the new formulas.
By their aid, indeed, we can solve with ease problems which could hardly be attempted otherwise. In this connection the list of literature upon the continuous girder appended to Chap. XIII. May also be of service.
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