CRITICAL SOFTENING PARAMETERS AND FULL-RANGE ANALYSIS FOR INDETERMINATE BEAMS

When the failure load for an indeterminate reinforced concrete structure is defined as the maximum or collapse load, then flexural softening may occur in some regions of high bending moment before failure. It is proposed to take this into account by computing critical softening parameters which define the third portion of trilinear elastic- plastic-softening approximations to moment-curvature curves, and using these for full-range analyses of indeterminate beams. Results from the simplified method compare well with those from tests by Ghosh on propped cantilevers. A number of critical softening parameters are identified and calculated for a twice indeterminate beam following different paths to failure. Generalizing, it is concluded that it should be possible to modify existing computer programs for frame analysis to incorporate softening parameters, and thereby both to simplify computations for collapse loads and to make them more realistic. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0867461403
• Corporate Authors:

  Monash University

  Department of Civil Engineering
  Clayton, Victoria  Australia  3800
• Authors:
  • Darvall, P L
• Publication Date: 1982

Media Info

• Features: Figures; References; Tables;
• Pagination: 25 p.
• Serial:
  • Publication of: Monash University, Australia
  • Publisher: Monash University
  • ISSN: 1445-4467

Subject/Index Terms

• TRT Terms: Beams; Bending; Bending moments; Computer programs; Curvature; Deflection; Elastoplasticity; Failure; Loads; Mechanical elasticity; Plasticity; Reinforced concrete; Softening point; Structural analysis
• Uncontrolled Terms: Elastic plastic analysis; Loading
• Old TRIS Terms: Failure theory
• ITRD Terms: 3472: Beam; 5586: Deflection; 5912: Elasticity; 5520: Failure; 5567: Load; 5922: Plasticity; 4794: Reinforced concrete; 5272: Softening
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00385380
• Record Type: Publication
• Source Agency: ARRB
• ISBN: 0 86746 140 3
• Report/Paper Numbers: 2-1982 Monograph
• Files: ITRD, TRIS, ATRI
• Created Date: May 30 1984 12:00AM