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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:
SP12-05
Date:
January 1, 1965
Author(s):
Alan H. Mattock
Publication:
Symposium Papers
Volume:
12
Abstract:
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.
DOI:
10.14359/16716
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
SP12-10
Leonard L. Jones
With discussion by Manuel Xanthakis and Leonard L. Jones. This paper reports certain aspects of the work carried out on yield line analysis at four research centres in Great Britain. Conditions governing the upper bound moment distribution along the yield lines are established and from these nodal force values are obtained. The values obtained agree with those given by Johansen but new restrictive rules are revealed. These rules allow the known anomalies in the equilibrium method for patterns with straight line characteristics to be resolved. By direct appeal to the work method it has also been possible to establish new governing rules for nodal forces at yield line junctions which have moments specified in more than three independent directions. Nodal force values which should be inserted at reinforcement discontinuities are also obtained. These new developments are applied to several specific problems in order to demonstrate their use.
10.14359/16721
SP12-17
A. A. Gvozdev
h accordance with recent views that have been clearly expressed in the 1954 and 1962 Building Codes of the USSR [ 1], [ 2] ,2 the 1963 recommendations of the CEB, and to some degree in other building codes of the world, the purpose of the calculations described herein is to evaluate whether a structure will attain some limiting state that would render its normal utilization impossible, or improbable. The different limit states are: (1) Failure (Loss of strength, impaired endurance, loss of stability) ; ( 2) excessive deformations; (3) excessive vibrations; or (4) excessive cracking that would reduce the durability or adversely affect the appearance.
10.14359/16728
SP12-12
Antoni Sawczuk
Plastic analysis is applied to evaluation of the membrane action in transversally loaded reinforced concrete slabs with edges restrained against lateral movement. Relations of the large deflection theory of flexure together with the yield condition, appropriate for reinforced concrete slabs, are used in order to obtain the load-deflection curves both in the compressive and tensile membrane action. The membrane action is found to influence considerably the actual carrying capacities of slabs. The developed method yields a continuous transition from the compressive membrane response to the tensile one.
10.14359/16723
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