Advanced unified failure model on uniformly reinforced concrete annular section members

摘要

Based on traditional Nielsen model (Nielsen, Limit analysis and concrete plasticity, Prentice-Hall, Englewood Cliffs 1984), a unified failure model on uniformly reinforced concrete annular section members under combined forces of tension, compression, bending, shear and torsion is introduced. The advantages of this model are that the dowel action of reinforcements is considered and a reasonable adjustment on shear carrying capacity of concrete at failure surface is introduced, which should vary with the normal stress at the member failure surface. The theoretical results of this model are compared with a group of experimental results of annular section members. The comparison has verified that the advanced model is more accurate and feasible to be used for design of annular section members.