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Volume 30 Issue 2
Apr.  2017
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Journal of Southwest Jiaotong University  > 2017  >  30(2): 239-246.
HE Guangjie, ZHAO Yiding, XIN Yazhou, LIU Chengqing, NI Xiangyong. Simplified Calculation Method and Experimental Verification for Flexural Failure Skeleton Curve of RC Columns[J]. Journal of Southwest Jiaotong University, 2017, 30(2): 239-246. doi: 10.3969/j.issn.0258-2724.2017.02.005
Citation: HE Guangjie, ZHAO Yiding, XIN Yazhou, LIU Chengqing, NI Xiangyong. Simplified Calculation Method and Experimental Verification for Flexural Failure Skeleton Curve of RC Columns[J]. Journal of Southwest Jiaotong University, 2017, 30(2): 239-246. doi: 10.3969/j.issn.0258-2724.2017.02.005
shu

Simplified Calculation Method and Experimental Verification for Flexural Failure Skeleton Curve of RC Columns

doi: 10.3969/j.issn.0258-2724.2017.02.005
  • Received Date: 08 Dec 2015
  • Publish Date: 25 Apr 2017
    Abstract
  • In order to meet the requirements of performance-based seismic design and nonlinear dynamic analysis, it is necessary to explore the simplified calculation method for moment-rotation angle (M-) skeleton curve of flexural failure reinforced concrete (RC) columns. Firstly, the curve was simplified as three-linear line M- skeleton curve, which is represented by three feature points, i.e., yield point, peak point and ultimate point. Then, considering the effects of flexure, shear and steel bond-slip on the rotation of RC columns and based on the flexural theory of RC columns and plane section assumptions, the iterative method was used to obtain stress and strain distribution on cross section, and the values of moment (M) and rotation angle () for each feature point were obtained according to the moment-curvature relation of cross section. Then, a simplified calculation method of M- skeleton curve was proposed. Finally, the calculated and test results of six cases were analyzed, and the ratio S between the calculated and test values was calculated. The coefficients of variation for each feature point ratio S are less than 15%, which show good agreement between the calculated and test results, and validate the proposed simplified calculation method.

     

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