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Structural Research Series 539PDF


Title:Nonlinear Analysis of Plane Stress State Reinforced Concrete Under Short Term Monotonic Loading
Author(s):Hu, H-T.; Schnobrich, William C.
Subject(s):Reinforced concrete
nonlinear analysis
Strains and stresses -- Plane
Finite element analysis
Abstract:Reinforced concrete demonstrates a highly nonlinear behavior caused by cracking, aggregate interlock, bond slip, dowel action, shrinkage, creep, etc. Because its behavior can involve so many nonlinear phenomena interacting with one another, the formulation of rational analytical procedures is very difficult. Today with the help of computer, the finite element method offers a powerful tool for studying reinforced concrete structures. However, the success of such analyses depends on thorough understanding and modelling of the composite material behavior. In this study, an elastic strain hardening plastic model is derived for concrete. The stress-strain behavior for reinforcement is modeled as an idealized bilinear curve. Dowel action of steel is neglected and perfect bond is assumed between concrete and steel. For cracked reinforced concrete, the smeared crack system is adopted. Two types of crack models, fixed crack model and rotating crack model, are formulated and tension stiffening, stress degrading effect parallel to crack direction and shear retention have all been included. Through a layering approach these material models are further extended to model the flexural behavior of reinforced concrete structures. These reinforced concrete material models have been tested against the experimental results and it is demonstrated that they are suitable to model the behavior of reinforced concrete structures.
Issue Date:1988-04
Publisher:University of Illinois Engineering Experiment Station. College of Engineering. University of Illinois at Urbana-Champaign.
Series/Report:Civil Engineering Studies SRS-539
Genre:Technical Report
Sponsor:National Science Foundation Research Grant CEE 83-00226
Date Available in IDEALS:2009-11-04

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