FAILURE SURFACE FOR CONCRETE UNDER MULTIAXIAL LOAD - A UNIFIED APPROACH

A new unified five parameter failure surface has been proposed for use with normal strength, high strength, and steel fiber reinforced concrete (SFRC) under biaxial, triaxial, or asymmetric loads. The study covers concrete with strengths ranging from 20 to 130 MPa. The failure surface developed for plain concrete has been modified to account for the presence of steel fibers. The proposed failure surface was verified against experimental data of unconfined normal strength, high strength, and steel fiber reinforced concrete under multiaxial loads, as well as concrete confined by steel tubes. To facilitate the implementation of the failure surface into a finite element package, a closed form solution for predicting the state of stress in concrete has been developed. This failure criterion was successfully incorporated into constitutive models for plain and SFRC. Experiment of plain concrete cubes and SFRC plates under multiaxial loads, as well as SFRC beams under two-point load, were modeled to illustrate the application of the failure surface to a wide range of concrete under varying load conditions. Good agreement between analytical and experimental results is observed.

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  • English

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  • Accession Number: 00989480
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 2 2005 12:00AM