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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:
SP127-14
Date:
October 1, 1991
Author(s):
James Robert Harris and Gene R. Stevens
Publication:
Symposium Papers
Volume:
127
Abstract:
Current building standards contain complex sets of rules for detailing reinforced concrete structures to resist earthquakes. The rules are intended to deliver reliable post-elastic energy dissipation. This is necessary because structures are designed to yield at levels of motion that are only a fraction of the real motions in a strong earthquake. The detailing rules are intended to prevent brittle modes of failure, such as shear and unconfined compression of concrete, while encouraging widespread flexural yielding. The rules also take into account two other distinctive characteristics of earthquake loading reversal of direction and repetitive cycles. This paper attempts to set forth the rationale for these detailing rules that will allow the designer to see the overall design philosophy and to relate a particular design to the intended performance.
DOI:
10.14359/3029
SP127-13
Mark Fintel and S. K. Ghosh
An alternative to the empirical code approach for earthquake-resistant design of building structures is proposed. The suggested procedure uses carefully selected earthquake accelerograms as loading and dynamic inelastic response history analysis to determine member forces and deformations. A number of analyses make it possible to design into the structural elements a desirable balance between flexural strength, shear capacity, and ductility. The amount of allowable ductility in a yielding member depends on selected serviceability criteria and on the deformational capacity of the member. The design approach makes it possible to predetermine the sequence in which inelasticity spreads to various designated structural members. A structure needs to be provided with special ductility details only in the predetermined hinging regions.
10.14359/3028
SP127-12
Richard E. Klingner
Discusses the relationship between the topics covered previously in this publication and modern design codes for reinforced concrete. Three modern code-type documents are discussed: the 1988 Uniform Building Code; the Building Seismic Safety Council's 1988 NEHRP document; and the 1982 New Zealand National Standard for Reinforced Concrete Design. The principal requirements of each document with respect to the seismic design of reinforced concrete buildings are summarized, and the philosophical bases of those requirements are reviewed.
10.14359/3026
SP127-11
Sharon L. Wood
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.
10.14359/3024
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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