Cyclic Shear and Flexural Behavior of L- and T-Columns

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Title: Cyclic Shear and Flexural Behavior of L- and T-Columns

Author(s): Yu-Chen Ou and An-Nhien Truong

Publication: Structural Journal

Volume: 115

Issue: 6

Appears on pages(s): 1603-1613

Keywords: effective shear area; flexural strength; L-column; reinforced concrete columns; shear strength; T-columns

Date: 11/1/2018

Abstract:
Seven full-scale L- and T-columns were tested using lateral cyclic loading in this research to investigate their shear and flexural behavior. Based on the test observations, a new way of calculating the effective shear area that includes the contribution of the overhanging flange was proposed for L- and T-columns. The proposed effective shear area combined with the shear strength equations for columns of the ACI Code not only produced shear strengths that were more reasonably conservative but also showed less scatter than the current ACI Code method. The L- and T-columns that were designed with a sufficient amount of shear reinforcement determined by the proposed shear strength equations showed flexural, ductile behavior with ductility capacities ranging from 6.1 to 7.6. Based on the test results of these flexural columns, it was found that the ACI 318 code was conservative for the nominal flexural strength but unconservative for the maximum probable moment strength.