Minutes of Proceedings of the Institution of Civil Engineers Volume 54

Minutes of Proceedings of the Institution of Civil Engineers Volume 54

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1878 edition. Excerpt: ...formulae must both be considered as practically correct, for columns with fiat bearings at the ends, of diiferent lengths and shapes of cross-section, provided the ultimate strength of one column, made of the iron to be used be determined, so that the value of the constant f to be applied in the formulae may be calculated. This constant being very approximately proportional, but not equal to the ultimate strength of the iron, and not the same in the two formulae, being smaller for Rankine's than for Gordon's. " 4. For columns hinged on pins at the ends, Gordon's and Rankine's formulre for columns rounded at one end and fixed at the other, will give approximately correct results, provided f be determined as noted above. _ " 5. For swelled columns, the formulae are also applicable, provided the diameter at the end he used. " 6. It is of great importance for all built columns, and especially for open columns, that the several parts should be well riveted at the ends, and that true and even bearings at the ends be obtained. " In determining the sectional areas of the columns and struts for each structure, the foregoing conclusions were followed. " Tests Nos. 6 and 12 confirmed the fact already pointed out by some experimenter, but not universally admitted, that wrought-iron, when submitted to a pressure beyond that corresponding to its limit of elasticity, and allowed to rest, will afterwards possess a higher limit of elasticity. " The singular results given by tests 13 and 19, in which both columns bent in the direction giving the greatest radius of gyration, which for No. 13 is perpendicular to the plane of rotation around the end pin, can be explained by defective fittings at the ends, ...show more

Product details

  • Paperback | 164 pages
  • 189 x 246 x 9mm | 304g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236879813
  • 9781236879813