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SECOND CONGRESS ON LARGE DAMS Washington, d. c, 1936. COMMUNICATION MISCELLANEOUS OBERTIand BONFIOLI ITALY. RESEARCH ON THE STRESSES OF ARCH DAM RINGS

26 pp. (English).
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 Summary

26с.

1936

J f CONFERENCE EKOÖft OXLt]

ECOND CONGRESS

N LARGE DAMS

5* Washington, d. c, 1936

COMMUNICATION 'j MISCELLANEOUS

OBERTI_and BONFIOLI ITALY

RESEARCH ON THE STRESSES OF ARCH DAM RINGS

10

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G. Oberti and B. BonfioTJT

Civil Engineers Italy Part I

Wherever the topographical and geological conditions are suitable arch dams represent the best form of barrier for the creation of storage reservoirs, as they afford the maximum safety 1 combined with very efficient structure. Consequently, it is of the greatest importance to be able to know with increasing accuracy the distribution of the stresses in the interior of such dams, both stresses produced by hydraulic pressure as well as those produced by other factors such as temperature, shrinkage of concrete, etc. A like knowledge permits giving to the structures more appropriate forms and dimensions so as to obtain a higher degree of safety (that does not always follow an increase in thickness) or to realize some economy.

The technical calculations for defining such stresses have recently become more and more accurate but even at the present time it is necessary to depart from hypotheses which are not always a priori justifiable, and in order to overcome almost insoluble complications, further hypotheses have to be introduced for simplification.

To complete our knowledge of the subject it has been possible to deduce but little from direct measurements on the finished structures ; use has been made of small dams built for investigation purposes (as the notable one of Stevenson Creek and the more modest one built by Prof. Guidi at Turin), or of models, which are, however, limited to a few specific cases.

In solving the many problems connected with such structures, the contribution of modern research is, therefore, always useful and as a

* Recherchen sur les efforts dans les segments annulaires des barrages en voüte. Forschungen über Spannungen an Gewölberingen von Bogcndämmen. Imiestinacumes sobre los esfuerzos en los segmentvs (miliares de las }"resas bövedas. I dar has ever failed by reason of structural weakness of the arch.

f t «"-» ''M THE ITALIAN.)


 
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