Ultimate Strength of Reinforced Concrete Arches

ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Ultimate Strength of Reinforced Concrete Arches

Author(s): O.P. Jain

Publication: Journal Proceedings

Volume: 57

Issue: 12

Appears on pages(s): 697-714

Keywords: none

Date: 12/1/1960

Abstract:
As the load on an arch increases gradually, the portion of the rib near the section of maximum moment starts show- ing plastic deformations which result in an increase of horizontal thrust in the arch above that given by the elastic theory. This causes a reduction of maximum positive mo- ment and an increase of maximum negative moment and thus the maximum moment in the arch is reduced resulting in a greater load bearing capacity of the arch. It is found that the actual ultimate strength of two-hinged arches of uniform section for various patterns of loading is 50 to 100 percent greater than the ultimate strength given by elastic theory. A method of calculation is presented which takes into account these plastic deformations. Complete agree- ment is found between the theoretical and test results. Although the calculations refer only to a single concen- trated load on the arch, the same approach can be applied to find the ultimate strength for other loading patterns (including dead load).