Time-dependent analysis of reinforced and prestressed concrete members

Sergio Eduardo Gutiérrez, Roberto Oscar Cudmani, Rodolfo Francisco Danesi

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

A new step-by-step method is proposed that allows the determination of the history of strain and stress distribution in concrete sections with prestressed and nonprestressed reinforcement. It considers time-dependent effects on concrete and prestressed steel independently of the cracked or uncracked state. The analysis is performed at different time intervals satisfying the strain compatibility between concrete and all layers of steel, as well as the equilibrium equations in sections subjected to normal forces and moments due to external loads. The development along the time of the creep coefficient, shrinkage, and relaxation loss is taken into account on the basis of prediciton models and equations that may be extracted from codes and recommendations. Numerical examples in reinforced, prestressed, and partially prestressed concrete sections, including different loading conditions, are used to demonstrate the applicability of the proposed method.

Original languageEnglish
Pages (from-to)420-427
Number of pages8
JournalACI Structural Journal
Volume93
Issue number4
StatePublished - Jul 1996

Keywords

  • Compatibility
  • Concretes
  • Creep
  • Curvature
  • Equilibrium
  • Interval
  • Prestressed loss
  • Relaxation
  • Shrinkage
  • Steels
  • Strain
  • Stress
  • Time discretization
  • Time-step method

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