What I like about this Humber Bridge is the fact that the hanger cables are not vertically down as in the Tacoma Bridge, When the hanger cables are vertically down, then there are rectangles formed, and rectangles and squares can change their shape into a rhombus through changing their angles. This would permit the deck to oscillate a little reflecting the oscillation on the main catenary cables. This could lead to instability as standing waves can form along with the deck and along with the catenary cables acting as guitar strings. In the modern cable-stayed bridges they are full of triangles and with three sides the triangle is a geometrical figure that cannot change its shape, The Humber Suspension bridge did well to chose the hanger cables to be triangular rather than vertical as this added better stability, It would still oscillate a little but the triangulation of the hanger cables would damp this down much better than if the hanger cables were vertically upright as in many of the older suspension bridges. Well done to all the designers and the workers who had a hand at making this bridge, I would have added a few wider triangles from the main towers to the deck as the more modern cable-stayed bridges including the new one at Queensferry Scotland. That would enable the replacement of any cable, I saw the Forth Suspension Bridge being built at about 1960 and that has vertical hanger cables which I did not favor and did talk about it to the workmen but it remained at that level as I was only a young student at Newcastle University. The Forth suspension Bridge which was erected at about 1960 does not have a long life as the older cantilever bridge a few yards away from it. ua-cam.com/video/tgeFKVX2C-o/v-deo.html
What I like about this Humber Bridge is the fact that the hanger cables are not vertically down as in the Tacoma Bridge, When the hanger cables are vertically down, then there are rectangles formed, and rectangles and squares can change their shape into a rhombus through changing their angles. This would permit the deck to oscillate a little reflecting the oscillation on the main catenary cables. This could lead to instability as standing waves can form along with the deck and along with the catenary cables acting as guitar strings. In the modern cable-stayed bridges they are full of triangles and with three sides the triangle is a geometrical figure that cannot change its shape,
The Humber Suspension bridge did well to chose the hanger cables to be triangular rather than vertical as this added better stability, It would still oscillate a little but the triangulation of the hanger cables would damp this down much better than if the hanger cables were vertically upright as in many of the older suspension bridges.
Well done to all the designers and the workers who had a hand at making this bridge, I would have added a few wider triangles from the main towers to the deck as the more modern cable-stayed bridges including the new one at Queensferry Scotland. That would enable the replacement of any cable, I saw the Forth Suspension Bridge being built at about 1960 and that has vertical hanger cables which I did not favor and did talk about it to the workmen but it remained at that level as I was only a young student at Newcastle University. The Forth suspension Bridge which was erected at about 1960 does not have a long life as the older cantilever bridge a few yards away from it.
ua-cam.com/video/tgeFKVX2C-o/v-deo.html