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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: Analytical Study of Torsional Moment Induced by Shifting of Shear Center of RC Cross Sections
Author(s): H. Nakamura, Y. Yamamoto, A. Itoh, and T. Tanabe
Publication: Special Publication
Appears on pages(s): 177-188
Keywords: asymmetric-resistant mechanism; biaxial loading; fiber technique; induced torsional moment; shear center; shear flow
Abstract:For members with symmetric cross-sections, the geometric centroid and shear center are coincident. Thus, if lateral load is applied through the geometric centroid, a torsional moment is not induced. However, a RC cross sections typically develop an asymmetric resistance mechanisms, resulting in progressive movement of the shear center away from the geometric centroid as nonlinearity increases and the section responds to bi-axial loading. In this study, the mechanism causing shifting of the shear center for RC cross sections was investigated using frame elements with a fiber-type discretization of the member cross-section. Then, the effects of the torsional moment induced by the shifting of the shear center were discussed, and it was shown that the effect in not negligible in practical design.
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