This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 Excerpt: ...division of the load-line, thus obtaining the curve E G D. The second half of the curve was obtained by spacing off 0'-3 to the left. 101. ...Read MoreThis historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 Excerpt: ...division of the load-line, thus obtaining the curve E G D. The second half of the curve was obtained by spacing off 0'-3 to the left. 101. Practical Application.--Having at hand a wooden model of an arch-ring, representing the voussoirs, or stones, of a semicircular arch, we tried some experiments as tests of the accuracy of this method of analysis and of the correctness of these results. The arch is represented by Fig. 26, and consisted of forty-two independent voussoirs. The span, AB, of the middle line of the ring, 18 inches, was 13.09 times the thickness of the ring, and the structure would apparently-just stand alone when left to itself: a slight additional weight at the crown would cause that part to sink, the haunches to move outwards, and the ring to fall in pieces. Considering that this arch, so long as it rested squarely on the faces at A and B, was fixed in direction, or not free to turn at the ends, we laid off at A E and B D the value of yx obtained in the last section, and drew the equilibrium polygon, as just described, on the centre line of the ring, beginning at D with a line parallel to 0-4. It will be noted that no line is used from 0 to 1; for the weight represented by 1-4 is directly supported at B; while the amount 4-5 is the weight concentrated on the first vertical just above D. As the arch is a continuous ring, the weights may properly be concentrated at a greater number of points; so that finally the true equilibrium curve will pass through the vertices of the poly gon we have just constructed: the difference between the two is unimportant, however, and is only appreciable near the crown. The bending moment at any point has been proved to be equal to H multiplied by the vertical ordinate between the centre line and the equilibrium ...Read Less
New. This book, "Trusses and Arches Analyzed and Discussed by Graphical Methods, Volume 3", by Charles Ezra Greene, is a replication. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.
Copyright in bibliographic data and cover images is held by Nielsen Book Services Limited, Baker & Taylor, Inc., or by their respective licensors, or by the publishers, or by their respective licensors. For personal use only. All rights reserved. All rights in images of books or other publications are reserved by the original copyright holders.