ANALYSIS OF HYSTERETIC BEHAVIOR OF ANCHORED REINFORCING BARS

This paper presents the analysis of the hysteretic behavior of anchore d reinforcing bars with a new finite element model. The Smile element is based on the interpolation of the steel stress distribution and thu s, is flexibility-based. It is characterized by robust and stable nume rical behavior even in the presence of significant strength loss and s oftening as might be the case with reinforcing bats of insignificant a nchorage length. After a brief description of the salient features of the model, the paper establishes the validity of the model by correlat ion of analytical with experimental results on anchored reinforcing ba rs under severe load reversals. Several parametric studies are present ed in order to study analytical features of rite model, such as sensit ivity to mesh refinement and number of integration points. A second ob jective of the parametric studies is to investigate the effect of key material parameters on the hysteretic behavior of anchored reinforcing bars.