Abstract
Concrete is a very popular material in civil engineering, although it exhibits somelimitations. The most crucial limitation is its low tensile strength, compared to itscompressive strength, which results from the propagation of micro-cracks. This may beprevented by using prestrained shape memory alloy wires that are embedded in theconcrete matrix. Upon activation, these wires regain their original shape, and consequentlyinitial compressive stresses are transmitted to the concrete matrix. In this study, athermomechanically micromechanical model of prestressed concrete reinforced by shapememory alloy fibers is presented and examined for different reinforcement aspects. Itwas found that there is a strong relation between the activation temperaturedeviation and the behavior of the prestressed concrete. The relation between thefiber’s volume fraction and the composite response and the effect of the shapeof the reinforcing fibers and residual strain orientations is examined in detail.
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