T. Yoshimura et al., A DEVICE FOR SUPPRESSING WAKE GALLOPING OF STAY-CABLES FOR CABLE-STAYED BRIDGES, Journal of wind engineering and industrial aerodynamics, 49(1-3), 1993, pp. 497-505
An experimental study of wake galloping of a pair of parallel stay-cab
les for cable-stayed bridges was conducted in two wind tunnels to deve
lop a new device for suppressing the instability. In its early stage,
the following device was examined: A pair of parallel cables is connec
ted rigidly to each other with spacers so that the cables form a SINGL
E MEMBER with or without a GAP between the cables. It was determined f
rom the tests that the member without a gap is stable for all wind ang
les of attack with the exception being around 5 deg. Based on the expe
rimental results, an alternative device was developed consisting of a
pair of cables stranded helically. The strand was found to be stabiliz
ed aerodynamically as only a small portion of the cables is exposed to
the unstable wind angles of attack around 5 deg.