ABSTRACT
Parallel monostrand stay cable systems are frequently subjected to transverse vibrations due to wind and traffic. The stay vibrations may lead to substantial relative movements between the monostrand wires (fretting) in the free span of the tendons and local bending stresses in the anchorage regions (Hobbs & Raoof 1994). Recent bending tests on pretensioned (45% of UTS) high-strength steel monostrands have shown that wire failures due to fretting and high localized bending stresses were concentrated in the cable anchorage and at the midspan (Wood & Frank 2010, Winkler et al. 2011) (Fig. 1).
