Corbels are brackets that project from the faces of columns and are used extensively in precast concrete construction to support primary beams and girders. This paper proposes a softened strut-and-tie model for determining the shear strength of corbels. The proposed model originates from the strut-and-tie concept and satisfies equilibrium, compatibility, and the constitutive laws of cracked reinforced concrete. The shear strength predictions of the proposed model and the empirical formulas of American Concrete Institute (ACI) 318 are compared with the collected experimental data of 178 corbels. The comparison shows that the performance of the softened strut-and-tie model is better than the ACI 318 approach for all the parameters under comparison. The parameters reviewed include the concrete strength, the shear span-depth ratio, and the amount of horizontal hoop. It is therefore recommended that the current shear design procedures for corbels be reformed to incorporate the actual shear-resisting mechanisms as postulated by the softened strut-and-tie model.

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  • Supplemental Notes:
    • This research study was partially sponsored by the National Science Council of the Republic of China under Project NSC 88-2211-E-011-011.
  • Corporate Authors:

    American Concrete Institute (ACI)

    38800 Country Club Drive
    Farmington Hills, MI  United States  48331
  • Authors:
    • Hwang, S-J
    • Lu, W-Y
    • LEE, H-J
  • Publication Date: 2000-7


  • English

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Filing Info

  • Accession Number: 00797216
  • Record Type: Publication
  • Contract Numbers: NSC 99-2211-E-011-011, 59V-375, MSS-9021066
  • Files: TRIS
  • Created Date: Aug 7 2000 12:00AM