Properties Design Of Reinfor

Author : Nathaniel Martin
Publisher :
ISBN 13 : 9781332537082
Total Pages : 168 pages
Book Rating : 4.5/5 (37 download)

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Download or read book The Properties and Design of Reinforced Concrete written by Nathaniel Martin and published by . This book was released on 2015-08-09 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Properties and Design of Reinforced Concrete: Instructions, Authorised Methods of Calculation, Experimental Results and Reports by the French Government Commissions on Reinforced Concrete The rapidity of the development of reinforced concrete structures, the principle of which was indicated by Monier in 1877, is well known. Thanks to the initiative of some bold and skilful constructors, a considerable number of applications of Reinforced Concrete had already been made when on December 19, 1900, the French Minister of Public Works instituted a Commission to study the question from the point of view of his Administration. Notwithstanding the already numerous experiments, the properties of the new material were still imperfectly known, and the methods of calculation followed by different constructors presented essential differences and even absolute contradictions. The elementary properties of Reinforced Concrete were incompletely investigated, and it was unknown in what measure these properties permitted application to the new material of the principles and the results which had been laboriously acquired for metallic structures, and which constituted the classic science of the Resistance of Materials. The Commission decided that they ought first to study the elementary properties of Reinforced Concrete, reserving for later research, in the light of these properties, the interpretation of the complex phenomena arising in structures. The following are some of the facts established and results obtained by the Commission: - Experiments of several months duration have shown the importance of the contraction, denied by certain constructors, which occurs in concrete, not only at the end of the period of setting but also during a long period of hardening, and which influences the distribution of the stresses between the concrete and the metal. The constructor ought to make the necessary arrangements to avoid the undesirable consequences this contraction may produce. The study of elasticity is the basis of that of stress. The Commission made an important contribution to the former, and verified for the first time the exactitude of the law announced by one of its members concerning concrete under tension. The modulus of elasticity of concrete under tension varies according to a straight line law up to a certain limit, and afterwards becomes almost rigorously constant till rupture. The stronger the reinforcement with bars well distributed in the tension areas, the longer is rupture postponed. The laws of elasticity of concrete in compression had already been the object of numerous experiments. The Commission made additional experiments without revealing any new facts. Attention has been drawn to the fact that in compression members, the longitudinal bars necessarily produce resistances proportional to the shortenings which the concrete with which they are associated supports without crushing. Thus arises the idea of the importance of the ductility of the concrete. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.