Cyclopedia of Civil Engineering; A General Reference Work on Surveying, Highway Construction, Railroad Engineering, Earthwork, Steel Construction, Spe (French Edition)

 
9781234933685: Cyclopedia of Civil Engineering; A General Reference Work on Surveying, Highway Construction, Railroad Engineering, Earthwork, Steel Construction, Spe (French Edition)

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. 1920 edition. Excerpt: ...not to consider J-the web area when designing flanges of floor-beams and stringers, and the design here given does not consider the web as taking any bending moment. The design of an intermediate floor-beam will now be made. The loads for which it is designed are the floor-beam reaction due to the live load (see Cooper,p. 32), the floor-beam reaction due to impact, the dead weight of the stringers and track, and the weight of the beam itself. The latter weight is distributed uniformly over the entire length of the beam, and the other loads act as concentrated loads spaced 6 feet 6 inches apart at equal distances from the center. The computation of the concentrated loads is as follows: Live Load= 68 000 pounds OAT) Impact = 68000 X (3? 30Q ) 60500" Dead Load of Stringer = 2 (21 X 2 X 8 ).. 3 320" 400 Dead Load of Track =--X 21 4 200' ' Total = 136 020 pounds. The moment at points under the loads (see Fig. 168) is 136 020 X 5.25 X 12 = 8 575 000 pound-inches. This is due to the concentrated loads only. The weight of one floor-beam may be approximately determined by the same formula as used to determine the weight of plate-girder spans; only, in place of the length of the span, the length of the panel must be substituted. The total weight of the above floor-beam, then, is: W = QA5 X (123.5 + 10 X 21) X 21 = 3 160 pounds. The dead-load moment at the center due to this weight will be: Wl = 3 160 X 17 X 12 8 8 = 80 700 pound-inches, making a total moment at the center of the beam of 8 575 000 + 80 700 = 8 655 700 pound-inches. Note that the dead-load moment at the center of the beam is added to the concentrated-load moment at the point where the concentrated load is applied. This will give the total moment at the center of the beam as...

Les informations fournies dans la section « Synopsis » peuvent faire référence à une autre édition de ce titre.

(Aucun exemplaire disponible)

Chercher:



Créez une demande

Si vous ne trouvez pas un livre sur AbeBooks, nous le rechercherons automatiquement pour vous parmi les livres quotidiennement ajoutés au catalogue.

Créez une demande