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논문 기본 정보

자료유형
학술저널
저자정보
Taborda, Catia S.B. (Department of Civil Engineering and Architecture, Centre of Materials and Building Technologies [C-Made], University of Beira Interior) Bernardo, Luis F.A. (Department of Civil Engineering and Architecture, Centre of Materials and Building Technologies [C-Made], University of Beira Interior) Gama, Jorge M.R. (Department of Mathematics, Center of Mathematics and Applications, University of Beira Interior)
저널정보
테크노프레스 Structural engineering and mechanics : An international journal Structural engineering and mechanics : An international journal 제67권 제5호
발행연도
2018.1
수록면
465 - 479 (15page)

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In a previous study, design charts where proposed to help the torsional design of axially restricted reinforced concrete (RC) beams with squared cross section. In this article, new design charts are proposed to cover RC beams with rectangular cross section. The influence of the height to width ratio of the cross section on the behavior of RC beams under torsion is firstly shown by using theoretical and experimental results. Next, the effective torsional strength of a reference RC beam is computed for several values and combinations of the study variables, namely: height to width ratio of the cross section, concrete compressive strength, torsional reinforcement ratio and level of the axial restraint. To compute the torsional strength, the modified Variable Angle Truss Model for axially restricted RC beams is used. Then, an extensive parametric analysis based on multivariable and nonlinear correlation analysis is performed to obtain nonlinear regression equations which allow to build the new design charts. These charts allow to correct the torsional strength in order to consider the favourable influence of the compressive axial stress that arises from the axial restraint.

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