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Home > Publications > 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.
Showing 1-5 of 26 Abstracts search results
Document:
SP12
Date:
January 1, 1965
Author(s):
Sponsored by: ASCE, ACI, Univ of FL-College of Engrg, and NSF
Publication:
Symposium Papers
Volume:
12
Abstract:
SP12 Contains the proceedings of the 1964 International Symposium on Flexural Mechanics of Reinforced Concrete. In addition to providing a more basic understanding of the complex, non-ideal flexural behavior of reinforced concrete, this publication aims to further both immediate and long-range objectives in improving the analytical and statistical basis for the flexural design of reinforced concrete.
DOI:
10.14359/14064
SP12-07
H. E. H. Roy and Mete A. Sozen
With discussion by P. R. Barnard, S. Stockl, Vitelmo Bertero and C. Felippa, and H. E. H. Roy and Mete A. Sozen. In the application of limit design to reinforced concrete structures, it is essential to know the rotation capacity of the connections. The rotation capacity seldom limits complete moment redistribution in moderately reinforced members subjected to transverse loads. However, it may prove to be a limitation for overreinforced members or members subjected to combined axial and transverse loads. Usually the rotation capacity of the section is governed by the ductility of the concrete which can be improved with the use of transverse reinforcement. This paper reports and discusses the effect of rectangular ties on the load-deformation characteristics of concrete.
10.14359/16718
SP12-04
A. L. L. Baker and A. M. N. Amarakone
With discussion by E. Burnett, D. B. Beal, R. H. Wood, and A. L. L. Baker. The moment-rotation results are presented of tests on beams carried out by a number of laboratories working under the auspices of the European Concrete Committee. Idealized diagrams are plotted for comparison, and the basis of these diagrams is given as defining fundamental moment curvature relationships which may be used in ultimate load calculations of frameworks. A simple trial and adjustment method of design is explained in which compatibility of bending moment values and end-slopes can be established by joint by joint procedure. Simplification is effected by separating the sway angle from the total rotation at hinges. This simplification can either be made by joint trial and adjustment procedure or by using the Miiller-Breslau compatibility equations, separating the sway angle, which greatly simplifies these equations.
10.14359/16715
SP12-05
Alan H. Mattock
With discussion by Chan W. Yu and M. T. Soliman, and Alan H. Mattock. Limit design theories for reinforced concrete statically indeterminate structures require a knowledge of the rotational capacity of hinging regions in reinforced concrete members. An investigation is reported of this rotational capacity in reinforced concrete beams. Thirty-seven beams were tested involving the following variables: concrete strength, depth of beam, distance from point of maximum moment to point of zero moment, and amount and yield point of reinforcement. The data are analyzed and a method is proposed whereby the rotational capacity of a hinging region in a reinforced concrete beam may be calculated.
10.14359/16716
SP12-24
M. Z. Cohn
Along with the recent developments in the field, certain doubts were expressed on the practical value of limit design in structural concrete, with particular reference to the following aspects: 1. Limited redistribution in concrete structures due to the variable strength design of members. 2. Lack of economic advantages if additional reinforcement is required at plastic hinges to increase their ductility. 3. More critical service conditions than for structural steel. 4. Special service considerations leading to more complicated analytical work. Similar doubts marked the discussions of the CEB Committee XI at the Monaco Session of the European Concrete Committee in 1961. All these problems can, probably, be summarized as follows: Are there any reasons at all for developing nonlinear analysis and design methods for concrete structures? This writer believes the only reasonable answer to the above question is a straight "of course"! With this he assumes an analysis or design method obviously has to reflect as closely as possible the actual behaviour of the structure. The arguments to follow are but a brief justification of this answer, illustrating the reasons for a nonlinear design of structural concrete from both theoretical and practical considerations.
10.14359/16735
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