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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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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.
Title: Experimental and Analytical Modeling of Unbraced Multipanel Concrete Frames
Author(s): J. S. Ford, D. C. Chang, and J. E. Breen
Publication: Journal Proceedings
Appears on pages(s): 21-35
Keywords: axial loads; bending moments; columns (supports); frames;
columns; reinforced concrete; research; structural analysis; tied columns.
Abstract:This paper summarizes the physical and analytical modeling of a series of unbraced multipanel concrete frames. These frames had four columns of unequal stiffnesses and were loaded with beam, column, and lateral loads. The objectives of the test series were to study the behavior and redistribution capability of highly indeterminate concrete frames under realistic loading corn bina tions, to assess the applicability and accuracy of current design procedures, and to develop correct analytical modeling techniques for the nonlinear analysis of frames. This paper documents the experimental test procedures, the data interpretation methods, and the nonlinear analysis program used to model the frames. The data interpretation and nonlinear analysis relied heavily on axial load-moment-curvature (P-M-o) relationships , verified in a companion series of isolated columns tested under controlled deformation loading. The analytical modeling procedure approximated the demonstrated ductile rotations in critical column regions by inserting equivalent plastic hinges. Overall, the analytical program accurately predicted the load-deflection behavior, yield locations, sequence of yielding, and load levels at yielding.
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