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. 1892 Excerpt: ...direction cuts the base. Let R be the resultant of P and V acting at some point T on the base. Let s represent the distance BSlt and t the distance CT. Let the point T be taken as a centre of moments, and let the lever-arm of P with and n will be known as soon as / is found. To do this the value of / is expressed in ...
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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. 1892 Excerpt: ...direction cuts the base. Let R be the resultant of P and V acting at some point T on the base. Let s represent the distance BSlt and t the distance CT. Let the point T be taken as a centre of moments, and let the lever-arm of P with and n will be known as soon as / is found. To do this the value of / is expressed in terms of /, thus: reference to it be p. The lever-arm of V is b--s--t, and that of R is zero. Then the equation of moments is Pp = V(b-s-t), (46) which is the fundamental formula for the investigation of retaining walls. This may be written Pp=Vb-Vs-Vt, (47) which is sometimes a more convenient form for use, since Vb and Vs can be treated like single quantities. To investigate a wall, the factor of security n is to be determined. From formula (45), In this formula V is the weight of one unit in length of the wall, or, for a trapezoid, V=frMa + S), (51) and Vs is the moment of that weight with respect to the inner edge B of the base. By considering the trapezoid ABCD as the difference between the rectangle AaCc and the two triangles AaB and CcD, this is found, by the help of the principles of statics, to be Vs = vh(c? + ab + F-(za + b)h cot 6), . (52) and, dividing by V, the distance s can be determined if it should be required. To investigate a wall, formulas (52) and ($i) are first used, then (50), and lastly (45). As an example, let the following data be taken: A sandstone wall retaining a level bank of earth; tp = 34 degrees, w--100 pounds per cubic foot, h = 18 feet, a--2 feet, b = 5 feet, 6 = 80 degrees, v = 140 pounds per cubic foot. The value of P, from Article 8, is 3570 pounds, z being zero. The weight V is found by (51) to be 8820 pounds. Vs is found by (52) to be 4405 pounds-feet. These inserted in (50) give t = 1.75 feet, which, being..
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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New. New Condition Reprint of the original publication. Minimal shelf wear from storage, Cover looks very nice. inside is like new clean and crisp, Looks great. 132 pages. Quantity Available: 1. Shipped Weight: Under 1 kilo. Category: History; ISBN: 0559517033. ISBN/EAN: 9780559517037. Pictures of this item not already displayed here available upon request. Inventory No: 1561060330.
