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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 25 Abstracts search results
Document:
SP63-24
Date:
August 1, 1980
Author(s):
L. Bogue Sandberg and Fred W. Beaufait
Publication:
Symposium Papers
Volume:
63
Abstract:
The results of a study of the behavior of a shear wall stair shaft are summarized. Comparisons are made between deflections of a 1/24 scale Plexiglas model and predicted deflections from beam theory and finite element analyses. Both lateral loads and torsion are considered. Stair system stresses from a finite element analysis of a full scale, concrete prototype of the model are summarized. It is concluded that beam theory tends to over-estimate shear wall stiffness, and than an effort must be made to prevent damage to the stair system from severe shear wall deformations.
DOI:
10.14359/6667
SP63-08
M. lqbal and A. T. Derecho
This paper presents briefly the methodology and summarizes the results of ananalytical investigation of the dynamic inelastic response of isolated reinforced concrete structural walls to earthquake motions. Considered in particular is the distribution of inertial forces along the height of the struc-ture. Results of the analyses are compared with the design force distributions specified by the Uniform Building Code (UBC) and Applied Technology Council (ATC). Suggested modifications to the code force distributions, as these apply to isolated structural walls, are presented.
10.14359/6651
SP63-11
R. G. Oesterle, A. E. Fiorato, J. D. Aristizabal-Ochoa, and W. G. Corley
Results of an experimental investigation to determine inelastic load-deformation character istics of reinforced concrete structural walls are reported. Sixteen large structural walls have been tested. These tests show that structural walls possess signif icant rotational ductility when subjected to reversing loads. In addition, it was found that shear distortions within the hinging region of a wall are coupled to flexural rotations. Therefore, inelastic shear distortions should be considered in structures designed to utilize the inelastic capacity of struc-tural walls for earthquake resistant construction.
10.14359/6654
SP63-17
Chris D. Poland
Numerous computer analysis techniques for use in the seismic design of reinforced concrete structures are available to the design engineer and are finding general use. Unfortunately, these techniques are not "exact". Rather, they are forced to make a large number of questionable assumptions about earthquake characteristics and building behavior. To the practicing engineer, whose complex structures and structural elements defy symmetry, regularity and simplicity, the valid use of such technique depends on a complete understanding of the analysis limitations and inaccuracies and requires constant review of the results for analysis generated errors. This paper, while presenting a practical analysis application, addresses the serious difficulties and the inherent inaccuracies encountered in applying the most commonly used computer analysis techniques to concrete shear wall buildings. It is based on the actual computer analyses of a variety of middle-rise concrete shear wall buildings performed over the past few years at H. J. Degenkolb & Associates. This paper, while it addresses and identifies the invalid results that can be easily produced, believed and designed for, in concrete shear wall building analysis, also provides usable techniques for identifying, adjusting and correcting the problems that are encountered. As such, it provides the practicing engineer with additional insight and understanding of his computer analysis techniques.
10.14359/6660
SP63-03
Jun Yamazaki and Neil M. Hawkins
Results are reported of the correlation between finite element predictions of the strength and behavior of flat slab to interior column connections transferring moment and response observed in tests on such connections. Predictions of the elastic response of the connections were made using a general elasticity program and a plate bending program. Although the general elasticity program considered shear deformations, it did not provide a markedly better correlation with the test data than the plate bending program. The plate bending analysis was extended into the inelastic range using an incremental procedure that recognized variations in stiffness and yielding of the slab with the directions of the reinforcement and principal moments. While the measured strains in the reinforcement and concrete were in reasonable agreement with the predictions, the measured deflections were about twice the predicted deflections. That discrepancy was found to be caused by bond slip of the reinforcement passing through the column and the inability of the program to correctly assess the torsional cracked section stiffness of reinforced concrete.
10.14359/6646
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