Title: Interaction Surfaces for Prestressed Concrete I-Beams Under Combined Loading
Author(s): Bibiana M. Luccioni, Juan Carlos Reimundin, and Rodolfo F. Danesi
Publication: Structural Journal
Appears on pages(s): 106-112
Keywords: axial loads; beams (supports); bending moments; biaxial loads; combined stress; computer programs; failure mechanisms; flexural strength; I-beams; limit state design; prestressed concrete; reinforced concrete; shear strength; structural analysis; torsion;
Studies the ultimate stress behavior of prestressed concrete thin-walled open sections under combined actions. A method to construct interaction surfaces based on the theory of "limit planes" is proposed. The results obtained with a computer program developed for I-beams are also presented. Based on the numerical results, a design formula is proposed for reinforced and prestressed concrete I-members subjected to axial compression, or to tension, biaxial bending, and bimoment. Finally, a numerical example is illustrated and comparisons with test results are presented.