The Influence Of Bond Deterioration Zone On Tension Stiffening Of Flexural Members On Short-term Deflection

The bond between concrete and steel bars is of fundamental importance torndeformation characteristics of cracked concrete structures. It has been studied forrnmany years. But the results of the studies seem to be inadequate for concreternstructure analysis. They are not reflected in engineering practice and codes. Thisrnaffects the load caring capacity and deformational behavior of a beam. Moreover,rnthe present design trend introduces the use of higher strength concrete andrnreinforcement which leads to longer spans and smaller depth of beams, for this caserndeformations are often the governing design criteria. rnIn this study, the impacts of bond degradation on tension stiffening are examined inrnan analytical model. A method for calculating short-term deflection is proposed byrnconsidering these impacts. Also available experimental data is assessed whichrnconfirmed the theoretical predictions.

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