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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 15 Abstracts search results
Document:
SP127-11
Date:
October 1, 1991
Author(s):
Sharon L. Wood
Publication:
Symposium Papers
Volume:
127
Abstract:
The influence of the amount of reinforcement, axial stress, and loading history on the displacement capacity of slender reinforced concrete walls is discussed. Observations are based on the results of 27 laboratory tests of isolated walls. All walls sustained lateral displacements in excess of 1 percent of their height without appreciable loss in strength.
DOI:
10.14359/3024
SP127-07
Arnaldo T. Derecho and Arthur A. Huckelbridge
A brief discussion of soil-structure interaction, particularly in terms of its effects on structures subjected to earthquakes, is presented. Factors influencing the degree to which soil-structure interaction modifies the response of structures, when compared to the response of rigid-based structures, are listed. The distinction between inertial and kinematic components of soil-structure interaction is made and the generally beneficial effects of interaction on earthquake structural response is noted. Soil-structures interaction effects are most pronounced in rigid, massive structures founded on compliant soils. Brief mention is made of the uncertainties surrounding the determination of interaction effects on structural response, especially those associated with the effects of nonlinear soil behavior.
10.14359/3016
SP127-08
Finley A. Charney
Inelastic static and dynamic analysis of reinforced concrete structures is demonstrated with a specific example taken from the U.S.-Japan Cooperative Program on Earthquake Engineering. The analytical process is explained from a hierarchical perspective, starting with material constitutive relationships, progressing to cross-sectional and element modeling, and culminating with the assembly of the complete system. The computed static and dynamic inelastic response of the mathematical model is than compared to the behavior observed during shaking table tests of the 1/5-scale laboratory model. The paper concludes with a detailed discussion of the degree of correlation obtained, and suggestions for future coordinated analytical-experimental research.
10.14359/3018
SP127-09
Catherine Wolfgram French and Arturo E/ Schultz
In an effort to provide the structural design profession with an indication of the deformation capacity of reinforced concrete beams subjected to cyclic loading, results of 69 isolated reinforced concrete beam tests were assembled and interpreted. The influence of several parameters, including longitudinal reinforcement ratio, web reinforcement ratio, shear stress, shear span-to-depth ratio, axial load, floor slabs, loading rate, and loading history on deformation capacity were investigated. It was found that ductility factors in the range of two to nine reasonably may be expected from reinforced concrete beams. Of the parameters investigated, shear was identified as the single most important factor affecting deformation capacity. It was further determined that the effects of shear can be controlled most directly by limiting the demand placed on web reinforcement. To insure that beams exhibit ductility factors of at least five, it is recommended that the maximum shear force demand on web reinforcement be limited to 60 percent of its nominal capacity.
10.14359/3020
SP127-10
Murat Saatcioglu
Deformation capacity of reinforced concrete columns is investigated by examining the available test data. Tests of square columns, conducted under constant axial load and lateral displacement reversals, as well as those conducted under concentric compression, are considered. The test data are evaluated in terms of ductility and drift ratios. The results indicate that high axial compression, and high shear stress reversals, as well as high rates of loading, reduce column deformability. Confinement of core concrete improves column deformability significantly. This is achieved through the use of closely spaced transverse and longitudinal reinforcement, where the longitudinal reinforcement is laterally supported by closed hoops and crossties. The confinement action also improves with the volumetric ratio and yield strength of transverse reinforcement. The ACI 318-89 requirements for the amount of confinement reinforcement appear to be adequate for the columns evaluated in this paper.
10.14359/3022
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